Can a car fan still run after the engine is turned off?

Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.

Why does my TDI cooling fan run after shutting the engine off?

Since the vehicle does not know you are only going on a short trip, it may start this process just before you arrive at your destination and now that engine is switched off and the vehicle is stationary the system will self-activate the cooling fans at high speed in an attempt to bring down those high temperatures now trapped below the hood.

Why does the radiator fan run all the time?

The radiator fan may run up to five minutes and sometimes longer. Unless there is an electrical issue, it may stay on all the time until it drains the battery. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated.

When does the engine cooling fan come on?

Then i have just noticed that the engine cooling fan comes on as soon as i start the car ( even when engine cold ) is this standard on this car ? With the cooling fan on high and the start of the air induct pipe just behind the radiator would the fan cause to much air or draw air away from the induct pipe.

Why does fan run after the ignition is turned off?

The manual addresses this, saying, ” The electrical fan in the engine compartment could turn on for a few minutes after the ignition is switched from ON to OFF, whether or not the A/C is on or off, to cool the engine compartment quickly.” As crazy as this might sound to a new car owner, modern headlights make noise.

What can fan run after the car is shut off?

It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz. The radiator fan may run up to five minutes and sometimes longer.

Why does AC keep running after engine is turned off?

Having your air conditioner continue to run after you’ve turned it off is an issue that you’ll more than likely be able to resolve by utilizing the information here. The cause of this problem can be the result of a number of possible issues including extreme temperatures, a broken thermostat, a faulty relay switch , or even a damaged short circuit .

Should you turn air conditioner off before shutting engine off?

They believe that in order to protect and preserve the engine, it is better to turn off the air conditioner before stopping the car engine and to turn it on after the next ignition, rather than turning the engine and the A/C on and off at the same time.

When does the cooling fan come on in a car?

In my case, the cooling fan comes on when the engine is cold, even with the HVAC off and it will remain running at full speed when the engine is running, again with the HVAC off.

Is it normal for the radiator fan to stop running?

If no, then your engine was overheating, and that was a protective measure to cool it down. It must have stopped running after a while.. Get your cooling system checked. I would check the coolant sending unit sensor or a relay. (Keep in mind, it’s almost never the relay..) But if it does it when its hot its 100% normal for that to happen.

Why does my blower motor keep running after I shut off the car?

Some customers may comment that the blower motor is inoperative or continues to run after the vehicle has been shut off. These conditions may be caused by a blower motor control module failure.

Is it normal for an air conditioner fan to keep running?

The first thing you need to realize is that it’s perfectly normal for your HVAC system fan to continue to run for a few minutes after the air condition stops. However, if the fan runs by itself for more than a couple minutes, then you know there’s an issue.

Is it normal for a blower to run after the car is off?

Many vehicles allow the fan to continue to cool after the vehicle is off. I assume it turns off after a bit, and you may be able to find if this is normal by checking in the manual. I assumed it was the heater/AC blower. If it is the radiator cooling fan, Barkydog may be right.

Why does my Honda Accord fan keep running?

If this happens to your Accord, you might have a problem that needs fixing. The common culprits are the temperature sensors (your car has two), which are the fan switch and the fan timer module. This article will discuss the three reasons why your fan might continue to run, even after the car is shut off.

Why does my bike fan not stop running?

At times the battery (6 volt) would be near dead in one hour after shutting the bike off. The problem was a sticking set of points in the voltage regulator that voltage ran through from the gen. to the batt. The points were supposed to pop apart to prevent battery drain back through the regulator/generator.

What happens if you turn off the electric fan on a Jetta?

Electrical Fan continues running after car turned off. Draines battery. Electrical Fan continues running after car turned off. Draines battery. on Volkswagen Jetta Good news! We found 31 RepairPal Certified shops near you.

What to do if your cooling fan won’t stop running?

The fan will discharge the battery quickly if left running. Open the hood and locate the fuse relay box on the driver’s fenderwell. Remove the lid. Look on the inside of the lid and for the mapping of the fuses and relays with their location. Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one.

Why does the a / C fan keep running after the ignition is turned off?

The A/C fan continues to run after the ignition is turned off. This has occurred on at least 10 occasions, the most recent yesterday. This occurs whether the single key only is left in or removed from the ignition. It is a concern because of the drain on the battery.

What are the symptoms of a bad cooling fan relay?

1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.

Why does my car fan keep running after I Turn Off the engine?

Running cooling fans help cool down the engine even after you turn off the car. Common Causes. If your cooling fan runs for over 10 minutes after turning off the engine, you may have a problem that needs to be fixed. Here are some possibilities causing the fan to stay running longer. low coolant level, faulty coolant temperature sensor,

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.

What makes the radiator fan turn on or off?

A radiator temperature-sensing switch activates the fan relay at 198 degrees F turns the fan on and controls its operation. Make sure the key is off. Switching relays is the fastest way to check for a bad relay when possible.

Why is the radiator fan not working on my Jeep Grand Cherokee?

Remove a known good relay and swap it with the radiator fan relay. Operate the vehicle and check the operation of the unit replaced. If the unit works with the fan relay it proves that the relay is not the problem. Test the relay using jumper wires and a voltmeter.

How long does a car cooling system fan stay on?

It’s perfectly normal to have your cooling system fan stay on after you’ve shut off the car, but it shouldn’t stay on longer than ten minutes. In some cases the fan stays on too long, which causes the battery to drain.

How can I tell when my VW fan is running?

Some of us have installed OBDII real-time monitors on our car, which allow us to see when one of these is occurring. With my ScanGaugeII, I know a regen has initiated when the EGT spikes from below 800F to over 1100F.

Why is my Buick LaCrosse fan still running?

(In fact engine heat can increase when you first shut them off since water pump is no longer circulating coolant, as hot coolant expands from the heads and into the radiator, the cooling fans need to run to bring that temp down. 15 people found this helpful. I have a 2015 Buick Encore.

Why does my Mini Cooper Engine Fan keep running?

I’m a little concerned about this because when this happened in my 2002 MINI Cooper the entire fan unit had to be replaced. Also caused the battery to die. Well with our 2008 Seat Leon 1.9 TDI BLS at work the fan runs all the time hot or cold. This happened to me once. I’ve had my 2012 Golf TDI for about 2 weeks.

How do you turn off an AC Fan in a car?

The way I have to turn it completely off,is first turn the a/c switch off, then wait about 1 to 2 minutes, start the car again, let it run a few seconds, then turn it off. The last time it happened it took me 3 trys, but make sure you look at the battery gage on the dash.

How can I tell if my engine cooling fan is turning off?

Tap on it with a screwdriver handle, and see if the fan shuts off. http://d3nevzfk7ii3be.cloudfront.net/igi/XbD1JcNwbHgRnN4b.standard 107 people found this helpful. If you found the fan module under the hood, and the fan shut off when you tapped on the module, you will need a new module.

Why does my AC fan keep turning on and off?

The actual AC is now turning on and off on its own sometimes when I am driving as well which does seem like it might mean a short. It also no longer stays on every time we turn it off, it not only does it about half the time.

What happens when you turn off the cooling fan?

At stops the engine shut off as expected. Cooling fan continued to run. When she arrived at her destination she turned the vehicle off. Cooling fan continued to run. She called me. I told her to hang around for five minutes to see if it would stop after a period of cooling down.

Is the radiator cooling fan in auto shut off mode?

Auto shut off mode was active (fuel saving mode). As some point along her 20 mile trip the radiator cooling fan came on. I thought this was odd due to the air temperature. At stops the engine shut off as expected.

What to do when your fan stops running?

When the fan is running, unplug the coolant temp sensor under the distributor. If the fan stops running replace that sensor. If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. If the fan stops running, replace that sensor.

Is it bad to have a cooling fan running?

The fan helps keep the wiring and electronic junk from holding the maximum amount of heat. It can’t hurt to have the fan run for a while unless you have an old battery, but that’s easy to fix. badbearing July 6, 2016, 1:30am #11 percolation? The fan stops cooling the radiator and the water pump quits pumping water. Yes.

When does the cooling fan start on a car?

My cooling fan starts immediately when I start the car even though it is cold and stays on until the engine is shut off. My cooling fan starts immediately when I start the car..stays… Starts and dies after a few seconds to a minute. And yes.

Why does my air conditioner fan keep running?

If the coolant temperature sensor is damaged or the wiring to it is shorted this will cause the fan to run. 2. There is a fault code set in the engine computer that will cause it to operate in a failure mode in that it turns the fan on to be sure the engine will be cooled.

Why are my cooling fans not turning on?

If the compressor is running long enough to build heat in the high side of the system, and the cooling fans don’t turn on, I would begin finding the fan relays and add power to the appropriate circuit to see if the fans turn on at all. This will require a wiring diagram.

What should I do if my radiator fan stops running?

If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. If the fan stops running, replace that sensor. If the fan still runs after unplugging both sensors, then problem might be with radiator fan control module located behind the glove box.

What causes engine cooling fan not to work?

What Can Stop Your Fan From Working: Defective temperature switch, (ECT) sensor or other sensor Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan relay A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.) Bad fan motor Defective fan control module

Why is my furnace blower not working?

One of the most common problems with furnace fans is a bad blower relay . The first thing to do is check the relay or voltage from the board. If no voltage is recorded, you will have to replace the board or the relay. If there is a battery, check if it is working properly. This is another common reason behind faulty blower fans.

Why is the engine cooling fan not working?

The temperature sensor determines when the radiator fan comes on by reading the cooling system temperature. 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.

Why would a car fan not blow?

Problems like a fan clogged with dirt, a dead motor, a loose fan belt or a stuck wheel can all cause your blower to not work properly. These problems can keep the blower fan from blowing enough air out of your vents to keep you cool.

What to do if your radiator fan won’t shut off?

EASY FIX.. – YouTube 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. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.

Why does my car blower motor not shut off?

If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won’t shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged.

Can a VW Jetta fan run after the engine is shut off?

Definitely hold on to the info. The fan can run after the engine shuts off, but I’ve read about failures where the fan keeps running until the battery is dead. A sticking relay or switch, can jar itself loose while driving. But if it sticks once, it will likely do it again.

Why does my radiator fan run full speed when I start the car?

Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. The AC is OFF. The radiator and condenser are BRAND NEW. This problem existed before and after the radiator was replaced. The fan continues to run at its maxiumum speed, regardless of the engine temperature.

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.

When does the cooling fan come on or off?

I’ve read that the cooling fan will run the whole time when either the A/C is on or the vent control is set to defrost, regardless of whether the engine is cold or hot. In my case, the cooling fan comes on when the engine is cold, even with the HVAC off and it will remain running at full speed when the engine is running, again with the HVAC off.

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.

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 radiator not turn on when I start the car?

However, if you are able to notice the telltale signs and symptoms of a bad or failing radiator fan motor, you might be able to stop the problem before it gets worse. The most common symptom of a faulty cooling radiator fan motor is that the cooling fan does not come on when you start the car.

What happens if your car cooling fan is too low?

If the motor that drives the fan is faulty, then a new motor will have to be fitted. Check the engine coolant level. If your engine coolant’s too low, it means that the cooling fan will have to work harder to keep the engine at a normal temperature.

What happens when you disable the cooling fan?

The cooling fans are thermostatic and are designed to come on once a certain temperature is reached, or certain conditions are met. If the cooling fan motors fail, and disable the fans, the engine temperature will continue to climb until the engine overheats.

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.

Why are my radiator fans not turning on?

Unplug the coolant temperature sensor while the engine is running. This should cause the fans to turn on low then kick to high, IIRC. Typically when the engine computer loses the signal from the coolant temp sensor, it just turns both fans on high so the engine will not overheat. IIRC if you ground the gauge wire, the gauge should go to full scale.

What happens to the coolant when the engine is turned off?

When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated. When the engine is turned off, the coolant doesn’t circulate, and the heat stays trapped, therefore prolonging the engine from cooling. Running cooling fans help cool down the engine even after you turn off the car.

What should I do if my car won’t turn off?

With the ignition turned off and the car continuing to run, simply remove the plug from the alternator (DO NOT TRY AND REMOVE THE BATTERY POWER WIRE FROM THE POWER STUD!) and the car should shut off if the alternator is creating the problem.

Why does my alternator run when I Turn Off the car?

Generally, an OEM harness will not have the problem of alternator “run-on”, as there is usually a resistance wire in the dash harness to keep this from happening. Solution: To figure out where the problem exists, start the car and with the key in the ON position and the car running, turn off the key.

Why does the blower motor keep running after I Turn Off the car?

Why does the blower motor keep running after I turn off the car? If your car uses a blower motor controller, it can keep running the blower motor after you shut down the engine. Those used to be installed only on vehicles with automatic climate control with variable speed fans, but now they’re installed on many late model vehicles.

Why does my Furnace Fan not stop running?

Well, if your furnace blower fan won’t stop running, you could have any of the following problems: 1 You’re using the wrong thermostat fan setting 2 Your fan limit switch is on “manual override” 3 There’s a shorted thermostat wire 4 There’s a shorted wire at the fan limit switch More …

How does a blower motor reduce the speed of a fan?

In a vehicle equipped with a blower motor resistor, voltage is reduced by the value of the each resistor based on the position of the fan switch. The lower voltages result in lower fans speeds. The downside of blower motor resistors is that, in order to reduce voltage, a resistor converts the energy into heat.

Is the blower fan running when the AC is off?

This is with the blower switch on the off position and heater/ac on off. I can use the blower motor switch and put it to low/med/high and everything works fine but again the blower motor is running on low speed as soon as I turn key to the on position.

What should I do if my blower wont shut off?

If the blower stops with either of these steps, the problem is in the HVAC control module. However, if the blower continues to run at high speed with either of those tests, replace the blower motor control processor. Just as an FYI, the retail price of the blower motor control processor is $280.34.

Why is my radiator fan not turning on?

The computer sends power to the relay to activate it and turn the fan on. Once activated, however, if the relay sticks in the closed position then the fan will run until the battery is totally discharged.

When does a computer fan turn on and off?

The computer turns the cooling fan on and off when it receives a temperature indication from the coolant temperature sensor. When the temperature exceeds a specific value — usually 215 degrees Fahrenheit — the computer will turn the fan on.

Where is the fuse on a car fan?

Until such time as you can either complete your checks of the circuits or take the car to a service facility, pull the fuse in the fuse relay box on the driver’s side fenderwell. The fan will discharge the battery quickly if left running. Open the hood and locate the fuse relay box on the driver’s fenderwell. Remove the lid.

What should I do if my blower won’t shut off?

Refer to either the Blower Motor Control Processor Replacement or Blower Motor Processor Replacement-Auxiliary procedures in SI. After replacement of the blower motor control module, the customer may notice a slightly higher than expected blower motor speed at any of the blower speed settings.

Why does my blower motor not shut off?

All of sudden the fan motor started running on high speed and will not cut off of high no other way than the ground off the battery, could not find on fuse panel the fan fuse. helpful? To clarify, are you talking about the engine cooling fan (under the hood), or the blower fan (for heat and A/C)?

Why does my AC fan keep running when the thermostat is off?

Usually when the relay switch is broken, the fan will continue to run by itself. This happens because there’s no communication between the thermostat and the blower fan. Now, if it’s a short circuit, both the ‘on’ and ‘off’ commands you enter typically won’t get sent to the blower fan.

What to do if your YouTube heater is stuck?

Heater Blower Stuck on after key is off…FIXED! – YouTube Heater Blower Stuck on after key is off…FIXED! 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. To avoid this, cancel and sign in to YouTube on your computer.

Why does my blower run when the car is turned off?

When full of debris/leaves/twigs/etc from over the years, it backs up and oddly enough, diverts drain water (rain, carwash, etc) just above the passenger footwell…which happens to coincide with where the blower resistor/regulator is located. Hence, water + electric component more often than not = failure. Click to expand…

What causes the a / C blower to run uncontrolled?

Mostly (according to this forum) a failed BR causes the a/c blower to run uncontrolled. Btw your WIS a/c circuit diagram is not identical to mine for W208. However the blower motor/regulator part is the same. Still the Regulator?

Why does the cooling fan come on when the engine is cold?

Every time I go to start the car after it has been sitting for an entire day and the engine is cold, when I turn the key to the “On” position, before the engine is even started, the cooling fan comes on. How is this possible when the engine isn’t even running and the engine is cold. Again, the HVAC is off.

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.

Is it normal for a car fan to run all the time?

This is normal in many vehicles, such as BMW or Mercedes-Benz. The radiator fan may run up to five minutes and sometimes longer. Unless there is an electrical issue, it may stay on all the time until it drains the battery. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated.

Why are the fans running even when the engine is offline?

Conversely, the cooling fans may keep running even when the engine is offline. This odd behavior indicates a different issue in the relay that controls the fans. An electrical short in the relay can lock the armature in its open position permanently.

Why does my car battery die when I Turn Off the fan?

The design is to have the fan switch fail into an on position to protect the engine. Many a battery have been killed due to this because they normally run in for a few minutes after you stop. So you don’t know if it’s the normal few minutes run or a permanent one when you park and walk away.

Is it normal for a car cooling fan to run?

Some cars allow the fan to run after the key has been removed, some cars don’t. I like the ones that allow the fan to run. If you look under the hood, you will see a warning label telling owners to expect this fan behavior. It’s quite common in today’s cars.

Can a car cool with the engine off?

There probably would be nothing wrong with letting the engine cool “by itself” (which is what happens if the design removes power from the fan when the ignition is off), but since the normal operation of most cars is to run the fan when the water temperature exceeds a set threshold, it does so even with the engine off.

Can a car fan still run after the engine is turned off?