What happens if your radiator fan is not working?

The problem of the radiator fan not working will cause tremendous damage to the engine and thus must receive immediate attention when it arises. Learn how a radiator and a radiator fan work, how to diagnose the issue of radiator fan not working and the common causes.

What to do if your a / C fan is not working?

The a/c button turns the fans on LOW only, and the fans will still work on high if the engine temperature gets too hot, above 107C actually, or 224F. The only way to fix this is to replace the defective fan.

What happens to the fans when the engine gets too hot?

Both fans always work in tandem. The resistor pack inside the fans will burn out and the fans will stop working on low speed but will still work on high speed when the engine gets too warm. The a/c button turns the fans on LOW only, and the fans will still work on high if the engine temperature gets too hot, above 107C actually, or 224F.

Why do you need a radiator fan in a car?

To stop the engine from overheating, we take the help of coolants that flow through a radiator into the engine. The radiator’s job is to keep the coolant cool so that when it returns back into the engine, it is able to absorb more heat. A radiator fan is thus used to keep the temperature of the coolant in check. Thus, it has an important job.

Why is the radiator not working on my Chevy Silverado?

If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your Silverado is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.

What causes a car cooling fan to stop working?

There’s many reasons why a cooling fan could stop working, such as a bad sensor, relay, fuse and more. DIY car repair with Scotty Kilmer, an auto mechanic for the last 42 years. 1. Bluetooth Scan Tool: http://amzn.to/2nfvmaD 2. Cheap Scan Tool: https://amzn.to/2D8Tvae 3. Professional Socket Set: http://amzn.to/2Bzmccg 4.

Why is the radiator fan not working on my Chevy Equinox?

Your Chevy Equinox ‘s radiator fan has one of the most important jobs on the vehicle. It is the last line of defense between you and an overheating engine. If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed.

Is there a way to test a radiator fan?

You can test the electrical radiator fans by taking a wire from the car battery, unplug the radiator fan connector, and put 12v+ and ground into the connector. This is the fastest and easiest way to test your radiator fans. Because the radiator fan is often drawing so much power, there is often a relay that is powering the coolant fan.

What are the signs of a bad cooling fan?

Common signs include the engine running hot and cooling fans either not functioning or running all the time. 1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

Why does my HVAC fan not work in cool mode?

Typical thermostats will energize the G terminal when in cool mode, or when the fan is turned to manual “always on” mode. It sounds to me like the G terminal is not being energized. It could be at your thermostat, or at the furnace. The G wire could be broken, open, disconnected somewhere.

What should I do if my car fan is not working?

Blower still does not work. Checked continuity of 40 amp blower fuse; it’s okay. Checked most fuses for continuity in the PDC and Junction Box and they are okay. Note, there is no burnt or corroded wiring.

Why is the radiator fan not working on my Chevy Sonic?

Your Chevy Sonic ‘s radiator fan has one of the most important jobs on the vehicle. It is the last line of defense between you and an overheating engine. If the radiator fan is not working, it’s a serious problem.

What does it mean when your air conditioner fan is not working?

If the fan blades don’t spin at all, it’s likely the condenser fan is not working and possibly burnt out, requiring replacement. In either case, we recommend calling a professional HVAC technician to diagnose and remedy the problem. Frozen Evaporator Coil. Air conditioner fans not working can be a sign of a frozen evaporator coil.

Why does my furnace not turn on the blower fan?

Not sure why that is, but it makes sense of what you are seeing. If the W terminal is energized, it turns on the heat and the fan at the furnace. If the Y terminal is energized, it turns on the a/c outside unit, but not the blower fan.

Is there a fan for heat and cool?

Since you haven’t told us the make and model of any of the equipment, there’s no way to be specific about what happens in your furnace. Some furnace control boards have terminals for HEAT, COOL, and FAN. While others may only have HEAT, and/or FAN.

A radiator fan is important as it helps to circulate air within the engine of your vehicle and keep the engine temperature down. If the fan isn’t working, it could lead to overheating and cause damage to the engine which could prove very costly.

How can I tell if my radiator fan relay is bad?

Another easy way you can check if the radiator fan switch relay is bad is to swap the radiator fan relay with the condenser fan relay. If the radiator fan begins working, this is an indication that the fan relay is bad. If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step.

How can I tell if my electric radiator is running?

An electric radiator has wires that connect it to the car’s electrical system. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Use the volt meter to test if there is power to the wires.

What does it mean when your radiator fan is not working?

This is what we call a blown fuse. A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan.

How can I tell if my engine cooling fan is working?

So, the easiest way to check it is visually. Check it for a continuous wire with no breaks. Using a multimeter is another good way. So, if you find a blown fuse replace it. That may be all you need to get back on the road. But, If The Fuse Is OK, Move On To The Next Step.

Why is the coolant sensor on my radiator not working?

There could be a problem in the wiring to the PCM. High resistance or a partially broken wire causing the temp sensor signal to the PCM to be skewed / inaccurate. You need to have a scanner on it to look at what the PCM is showing as the coolant temp.

Why are the cooling fans not working on my car?

1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

When do you need to replace a cooling fan?

If you have a fan that’s dead or dying, the answer is to simply replace it. If a fan seems like its working, but the bearings inside it are on their way out, you could still be having issues with the rotational speed, and thus, not enough power to keep components cool or air moving through the system. You’ll need to replace the fan.

What should I do if my radiator fan is not working?

In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. All you have to do is lift the engine hood and listen closely for the sound of the fan. The best of modern cars have very quiet engines and so, it may not be easy to figure out the sound while you are inside the car.

How to troubleshoot an electric cooling fan problem?

1.Has the Cooling Fan Actually Failed? 1 If the fan comes on when the AC is running at MAX, but doesn’t run when the engine is hot, check the temperature sensor… 2 If the fan fails to come on, first check for a fan blown fuse or triggered breaker. On older vehicle models, you may… More

Where is the fan relay on a radiator?

The relay should be located passenger side, underneath the radio. Since the fans turn on when the temp sensor is disconnected, it can’t be a fan relay. It must be the 2 wire temp sensor or the ECU. Most likely the temp sensor since when it’s disconnected, the ECU turns the fans on. BTW yukiz is referring to the MFI or fuel pump relays.

Why do the fans come on when I Disconnect The Temp sensor?

Since the fans turn on when the temp sensor is disconnected, it can’t be a fan relay. It must be the 2 wire temp sensor or the ECU. Most likely the temp sensor since when it’s disconnected, the ECU turns the fans on.

Why does the radiator fan spin when the engine starts?

The fan belt is responsible for deriving power from the engine to transmit to the radiator fan. When the engine starts, the radiator fan starts spinning due to the power from the fan belt. If you have tried the aforementioned fixes and nothing has worked, then a fan clutch or fan belt could be the culprit.

Why is my Honda radiator fan not working?

If the radiator fan begins working, this is an indication that the fan relay is bad. If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot.

What causes a cooling fan relay to stop working?

Cooling fan relays can stop working for any number of reasons. Common causes for relays going bad include: There are several ways to tell if a bad cooling fan relay is to blame for an overheated engine. The easiest method is to start the engine and then turn on the air conditioning.

Why is the fuse on my radiator not working?

It is a very common problem that results in radiator fan failure: the fuse may burn off or simply fall off. You will, though, have to consult the owner’s manual to find out where exactly you can find the fuse, but once you have, it is an easy task.

To ensure optimal performance and lifespan, your engine must not overheat. Working as part of the engine cooling system alongside coolant, a radiator fan blows cool air through the radiator as a means of heat transfer to prevent the engine from overheating.

What causes a radiator fan to stop working?

Voltage spikes, high resistances in control circuits, defective vehicle batteries, bad wiring, short circuits, moisture, corrosion, and even excessive vibration due to damage to the fan itself can all cause a fan motor to fail.

How to diagnose radiator fan problems?

Part 8 of 9: Check if the radiator cooling fan is faulty Locate the radiator cooling fan. Park your vehicle and apply the parking brake. Open the hood and locate the radiator cooling fan. Warm the engine. Start your vehicle and allow the engine to run until it begins to get hot. Check the cooling fan. When the engine starts to get above the normal operating temperature, watch the cooling fan.

Why isn’t the radiator fan working?

The biggest cause of a radiator fan not working is a broken fuse. To see if the fuse is intact and working, you’ll need to look at the fuse panel in your vehicle which will probably be under the hood. The actual location will be listed in your owner manual and will show which fuse works for which component.

Why does your radiator fan keep going on and off?

Here are some possibilities causing the fan to stay running longer. low coolant level, faulty coolant temperature sensor, PCM or ECU defective. coolant leaks from the water pump, cracked radiator, worn upper or lower radiator hoses, leaky heater core, leaky thermostat housing,

What to do if your Honda fans are not working?

Honda Fans not working? DO this easy check First! If your Honda Fans aren’t working it can be easy repair. I found that both the radiator fan and the AC fan weren’t working. or replace the fans, relays, temperature switch or even the fuses. The temperature switch is an easy repair and it’s even easier to replace.

Why does my car fan come on when the engine is not running?

Consult your vehicle repair manual to check the required sensors and switches. On a warm engine, the fan may come on even if the engine is not running. When working on a hot engine or an engine that is running, keep your hands and tools away from the fan blades and moving components.

Why does my Jetta not have a cooling fan?

Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all. Was this answer helpful? I got a 2002 Jetta the cooling fans don’t turn on .

What happens if your air conditioner fan is not working?

If an air conditioner unit condenser fan isn’t working, it will prevent your air conditioner from cooling your home. If you continue to try to run your air conditioner with a broken condenser fan, it can damage your air conditioning system and lead to more repair needs.

How does a radiator fan work in a car?

The fan should also turn on after switching on the air conditioner. Positioned between the radiator and engine, cooling fans blow cooling air through the car’s radiator to cool down the heated water and coolant mixture that flows through the radiator. The radiator fans blow cooling air through the car’s radiator. Source: Adobe Stock

What should I do about my radiator fan configuration?

Radiator Fan Configuration: Does It Matter? – The Workshop If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations.

How are the fans on a radiator powered?

The fans are powered by the battery bus and each fan is individually fused by F2 (main fan) and F4 (subfan)—except for low-speed operation! There are no temperature or pressure switches. ECT and a/c pressure are supplied to the ECU from threewire sensors (not shown in the figure) on the ECU’s 5V reference circuit.

What happens when a radiator fan is disengaged?

When radiator discharge air is below a certain temperature, the coupling remains disengaged. According to Hayden Automotive, a typical disengaged coupling will run the fan at 30% to 50% of its input rpm.

Why is my car fan not coming on?

If the sensor isn’t working, your fan won’t come on because it won’t know that the temperature is hot enough to require activation, which can frequently lead to overheating. The sensor is usually located in the car thermostat cover. To check it, disconnect the wires from the sensor and touch them together.

Why does my condenser fan not come on?

condenser often has its own separate electric cooling fan. This fan should come on and remain on when the A/C system is operating. If the fan motor, motor relay or wiring is defective, the fan may not be working. properly, it must not be contaminated with air or moisture.

Why is the radiator fan not working on a Volkswagen Jetta?

If your Jetta has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor. Depending on the model year and engine, the location varies.

Why is your radiator fan not running?

The most common causes when a radiator fan is not coming on is broken fuse, bad wirings, bad coolant temperature sensor, bad fan relay, or a faulty radiator fan . Here is a more detailed list of the most common causes of a radiator fan not coming on.

Why does radiator fan not working?

the first thing to check is the fuse. If you don’t know where the…
check the fan wires. Start by unplugging the wires.
Temperature Sensor. The temperature sensor determines when the radiator fan comes on by reading the cooling system…
Coolant Level. Check the coolant level in your engine. The simplest way to do this is to look at the reservoir in the…

What is the best radiator fan?

List of Best Electric Radiator Fan in 2021 UPGR8 Universal 12 Inch High-Performance Slim Cooling Fan, (Black) We finalize our review with this High-Performance Slim Cooling Fan by UPGR8. AUTOSAVER88 High Performance 16 inches Cooling Fan Black Electric Radiator. AUTOSAVER88 12 inches Electric Radiator High-Performance Cooling Fan.

Why is the cooling fan not working?

If you think the cooling fan isn’t working because your temperature gauge is indicating overheating , open the hood, start the engine, and let it idle for 15 to 20 minutes. If the fan comes on, you may have a bad temperature sensor or gauge .

What can be the problem with my electric cooling fan?

What could be the problem with my electric cooling fan? Answer: Usually, the problem is with the fan control module. Check for trouble codes, even if the check engine light is not on. On rare cases, the problem is traced back to the car’s computer.

What should I do if my car cooling fan is not working?

On many modern vehicles, if you want to confirm whether your cooling fan is in working order, you can start the engine and let it idle. Set your air conditioning to the MAX setting and turn it on. The cooling fan should come on immediately or within the next couple of minutes.

What to do if your cooling fan won’t turn on?

Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor.

Why are my cooling fans running at all times?

3. Cooling fans stay on at all times. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.

Why does my electric fan keep overheating?

Apart from the bushings and the motor, clogged dirt on the blades can also have a serious effect and make your fan overheat. It may be a good idea to keep your fan clean by not letting the dirt get past your motor or even up to your motor for that matter.

What should temp be when cooling fan does not come on?

NOTE: if the cooling fan doesn’t come on when the engine has been operating for 20 minutes or more, make sure that coolant is reaching operating temperature, around 220°F (104°C). You may be dealing with a stuck-open thermostat.

On many modern vehicles, if you want to confirm whether your cooling fan is in working order, you can start the engine and let it idle. Set your air conditioning to the MAX setting and turn it on. The cooling fan should come on immediately or within the next couple of minutes.

What happens when a cooling fan relay fails?

If the relay fails, it will be unable to supply power to the fans, and as a result they will not operate. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator. 3. Cooling fans stay on at all times

What to do if your car heater is not working?

Solution: Set the heater to its maximum setting, remove the coolant tank cap and fill it to the proper level. Start the engine with cap still open and let the engine idle for a few minutes. If the coolant level should drop as the thermostat opens, top it up as necessary.

Why does my car heater keep blowing cold air?

There are many reasons your car’s heater isn’t working. Maybe the fan is malfunctioning. Perhaps your temperature gauge is running below normal. There could even be a puddle of liquid under the front of the vehicle. A lack of heat can be a symptom of a much larger problem. You could soon be facing failing parts or even a blown engine.

Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running. A faulty or broken relay cannot deliver power to the cooling fans. In turn, the unpowered fans won’t run, leaving the radiator to its own devices.

A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan. The fan itself often uses a big fuse of around 50A, while there might also be a separate small fuse to the fan control module.

What happens when a radiator relay goes bad?

A faulty or broken relay cannot deliver power to the cooling fans. In turn, the unpowered fans won’t run, leaving the radiator to its own devices. Deprived of the helpful influx of air from the cooling fans, the radiator cannot remove as much heat as it usually does.

A faulty or broken relay cannot deliver power to the cooling fans. In turn, the unpowered fans won’t run, leaving the radiator to its own devices. Deprived of the helpful influx of air from the cooling fans, the radiator cannot remove as much heat as it usually does.

Cooling fan relays can stop working for any number of reasons. Common causes for relays going bad include: There are several ways to tell if a bad cooling fan relay is to blame for an overheated engine. The easiest method is to start the engine and then turn on the air conditioning.

If the sensor isn’t working, your fan won’t come on because it won’t know that the temperature is hot enough to require activation, which can frequently lead to overheating. The sensor is usually located in the car thermostat cover. To check it, disconnect the wires from the sensor and touch them together.

3. Cooling fans stay on at all times. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.

Where is the Black fuse on a radiator?

The black multimeter probe will go to the negative battery terminal (for under-hood fuses) or a metal ground point on the car (for under-dash fuses). Each fuse has two contacts where you have to touch the multimeter’s test probes to get the readings.

Why are the valves on my radiator stuck?

Potential Causes. A good reason why your thermostatic radiator valves are stuck on one position could be that you left the valves on stuck position for quite a long time. When the valves cool down, they start sticking to each other.

How to test if a Honda radiator fan is working?

Here is how to test if the fan is functioning properly: 1 Unplug the radiator fan connector. 2 Run jumper wires between the connector’s two electrical terminals. See Contact Test in Step 1. 3 If the fan does not turn on, you will need to replace it.

Why is my thermostat stuck on one position?

This can be a truly taxing dilemma. A good reason why your thermostatic radiator valves are stuck on one position could be that you left the valves on stuck position for quite a long time. When the valves cool down, they start sticking to each other. The good thing is that troubleshooting a stuck radiator thermostat is relatively easy.

What should I do if my radiator fan stops working?

Turn the air conditioning to the maximum setting – this should spark the cooling fan to immediately come on. In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. If there’s a problem with the engine’s temperature, then this can damage the radiator.

Can a car run without a radiator fan?

Yes, your car can still run without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to the engine’s performance and lifespan. Every time your engine overheats, you’re causing tremendous damage to the precious engine.

The fan should also turn on after switching on the air conditioner. Positioned between the radiator and engine, cooling fans blow cooling air through the car’s radiator to cool down the heated water and coolant mixture that flows through the radiator. The radiator fans blow cooling air through the car’s radiator. Source: Adobe Stock

What to do if your car cooling fan is not working?

The cooling fan motors are an important component to any cooling fan assembly, and play a key role in keeping the car at safe temperatures during idle and low speeds. For this reason, if you suspect that your cooling fan motors may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic.

What are the symptoms of a bad cooling fan motor?

Cooling fans do not come on The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. If the cooling fan motors burn out or fail, the cooling fans will be disabled. The cooling fan motors work together with the cooling fan blades to pull air through the radiator.

What happens when you turn off the radiator in a car?

Deprived of the helpful influx of air from the cooling fans, the radiator cannot remove as much heat as it usually does. It sends still-hot coolant back to the engine, causing temperatures to rise as the coolant fails to do its job of cooling down the motor.

If the fan blades don’t spin at all, it’s likely the condenser fan is not working and possibly burnt out, requiring replacement. In either case, we recommend calling a professional HVAC technician to diagnose and remedy the problem. Frozen Evaporator Coil. Air conditioner fans not working can be a sign of a frozen evaporator coil.

Why is my heat pump fan not spinning?

Homeowners often report a heat pump fan not spinning. Heat pump yes, Fan no: The heat pump is running, but the fan isn’t. Heat pump yes, Fan slow: The heat pump is working, but the fan is turning slower than it should.

What causes an indoor fan to stop running?

1 Faulty relay or fan control 2 Faulty motor 3 Faulty fan belt 4 Bad wiring 5 Faulty thermostat 6 Frozen coil due to an air conditioning problem 7 Bad or weak motor capacitor

Can a blower fan be turned on in cool mode?

If the Y terminal is energized, it turns on the a/c outside unit, but not the blower fan. Typical thermostats will energize the G terminal when in cool mode, or when the fan is turned to manual “always on” mode. It sounds to me like the G terminal is not being energized.

What causes the radiator on a car to overheat?

14 – A Collapsing Radiator Hose Will Shut Down Your Cooling System. A collapsing radiator hose is usually caused by vacuum and is a sign of cooling system blockage or a bad radiator cap. A collapsing radiator hose will prevent coolant from moving through your cooling system and will quickly cause engine overheating.

Why does my car’s radiator fan overheat?

As the engine operates the coolant temperature will continue to rise, and if there is no air moving through the radiator to cool it, it will begin to overheat. It is the job of the cooling fans to provide that air flow, and they do so using electric motors.

What happens if the motor on the radiator fails?

If the cooling fan motors burn out or fail, the cooling fans will be disabled. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. If the motor fails the blades will not be able to spin or generate air flow.

When do you need to replace a radiator fan?

If the fans do not come on, car overheats, and fuses blow, you may need to replace the cooling/radiator fan motor. 1. Cooling fans do not come on 2. Vehicle overheating 3. Blown fuse Average rating from 130,153 customers who received a Vehicle Engine Cooling Inspection.

What to do if your cooling system is not working?

If your coolant system is not producing enough pressure to open your thermostat, it is likely caused by a kink in a coolant line, a leak, or a fault water pump. Visually inspect all of your lines and your radiator for signs of leaking or kinks. If you don’t find any, you may need to replace the water pump.

What causes a car’s cooling system to stop working?

A defective fan belt can cause the fan to stop working and not pull cooling air through the radiator. If your on the highway you might not even notice this as the speed of your vehicle will push air through the radiator. Once you stop, that air will not be pushed through your cooling system and you will overheat.

Why are my coolant fans not running when AC is turned on?

Coolant fans not running when ac is turned on. AC compressor clutch engage then it will disengage. System has freon in it. It was working find but now nothin7. My car has 234565 miles. My car has an automatic transmission.

If your coolant system is not producing enough pressure to open your thermostat, it is likely caused by a kink in a coolant line, a leak, or a fault water pump. Visually inspect all of your lines and your radiator for signs of leaking or kinks. If you don’t find any, you may need to replace the water pump.

Why does my PCM not turn on the fans?

You are looking to see if the PCM sends power to one or both relays to turn on the coolant fans. This should happen as the high side of the system approaches 214 psi. If it exceeds this amount of pressure and the system doesn’t turn on, one of the sensors in the system that the PCM uses to know when to turn the system on and off has failed.

Why is the radiator not working on my Honda CRV?

If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your CR-V is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.

What to do if your radiator fan is overheating?

Check the coolant level in your engine. The simplest way to do this is to look at the reservoir in the engine. It will be marked with maximum and minimum levels. Always make sure the coolant level is up near the maximum level to avoid possible overheating. 5. Fan Clutch

If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your CR-V is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.

What can cause a car fan to fail?

Voltage spikes, high resistances in control circuits, defective vehicle batteries, bad wiring, short circuits, moisture, corrosion, and even excessive vibration due to damage to the fan itself can all cause a fan motor to fail.

What can cause a heater fan to stop working?
- About Car Heater Fans. A bit of background on the working of car heater fans will be helpful in diagnosing the source of the problem.
- Prime Causes of Care Heater Fan Failure.
- ACCS (Automatic Climate Control System) Problem.
- Dysfunctional Motor.
- Blown Fuse or Loose Wiring.
  
  What can cause heater not work?
  
  The most obvious reason an electric heater doesn’t work is that it’s not receiving any power . Start by checking the circuit breaker to see if it has been tripped. If it has, it’s an easy fix – simply turn it off and turn it back on again. You may also have to replace the fuse if it has blown.
  
  What to do if car heater is not working?
  
  Check the heater core temperature. Lift the hood and check the temperature around where the heater core hoses enter the heater core box. The safest way to do this is with a non-contact infrared thermometer. If one hose is the same temperature as the coolant and the other hose is cold, there may be a blockage in the heater core.
  
  Why is my heater not turning on?
  
  Other mechanical issues can also cause the heater to remain turned on. A defective check valve. For radiators and other heating systems that rely on hot water, a bad check valve can cause the heater to stay on. Without a working check valve, water circulates on its own to keep the heating system turned on.
  
  When to troubleshoot an electric car cooling fan?
  
  On a warm engine, the fan may come on even if the engine is not running. When working on a hot engine or an engine that is running, keep your hands and tools away from the fan blades and moving components. Troubleshooting a cooling fan that doesn’t work can be a relatively straightforward task at times.
  
  What should I do if my radiator fan won’t work?
  
  If the radiator fan is in working condition, move on to the next step. The ECT sensor monitors the coolant temperature, and allows the fan to turn on if the coolant is too hot. If this sensor is faulty, a replacement costs around $25 to $45. Follow these steps to test it: Locate the ECT sensor, which is just below the distributor.
  
  Why is my radiator fan not working on my Honda Civic?
  
  Figure 1. 1999 Civic under-hood fuse box with location of fan relay (circled in red). Another easy way you can check if the radiator fan switch relay is bad is to swap the radiator fan relay with the condenser fan relay. If the radiator fan begins working, this is an indication that the fan relay is bad.
  
  Why is the radiator not working on my Ford Focus?
  
  If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your Focus is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.
  
  What are the symptoms of a bad cooling fan?
  
  Common signs include the engine overheating, cooling fan only working at certain speeds, and the fan never turning off.
  
  If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your Focus is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.
  
  How often does a car cooling fan stay on?
  
  Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.
  
  Why is the radiator fan not working on my Toyota Corolla?
  
  There are many reasons why your Toyota Corolla’s radiator fan is not working. Of all the ones listed above, start with the coolant level, then check the fuse. After that, the order isn’t so important. But, you don’t want to miss the easy fixes before you start testing wiring.
  
  Where is the cooling fan located on a late model car?
  
  The radiator cooling fan is mounted directly to the radiator. All late model vehicles are equipped with a radiator cooling fan. In some vehicles, there is more than one radiator cooling fan attached to the radiator. It’s possible to have one fail while the other continues operation.
  
  There’s many reasons why a cooling fan could stop working, such as a bad sensor, relay, fuse and more. DIY car repair with Scotty Kilmer, an auto mechanic for the last 42 years. 1. Bluetooth Scan Tool: http://amzn.to/2nfvmaD 2. Cheap Scan Tool: https://amzn.to/2D8Tvae 3. Professional Socket Set: http://amzn.to/2Bzmccg 4.

What happens if your radiator fan is not working?