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What to do if your Chevy Impala cooling fan is not working?

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What to do if your Chevy Impala cooling fan is not working?

Removing the wire from the temp sensor puts the fans into stay-alive mode, and they run constantly as you found out. Have the relay replaced and you should be fine. As far as the AC, it is most likely related to your cooling fan problem.

Where are the fan relays on an Impala?

In your lower underhood fuse block on the passenger side, there are three relays that control your fans. They go #3 , #2 , #1 (L to R I believe). #1 controls the primary cooling fan (driver’s side), #2 is the cooling fan control relay, and #3 is the secondary cooling fan (passenger side).

How big should the Freon charge be for a 01 Chevy Impala?

For an ’01 the freon charge should be about 2.2 lbs. Off the top I’d say that your problem sounds a lot like the a/c system needs a recharge. 7 people found this helpful. Almost forgot to mention that the a/c low pressure side sensor also provides an input to the body pcm.

What do I need to know about my Chevy Impala?

The body computer switches the relay ground circuits on or off depending upon the various input values. If the relays are all functioning correctly, then you’ll want to check the engine coolant temp sensor, the wiring from the relays to pcm, and the a/c charge level.

Removing the wire from the temp sensor puts the fans into stay-alive mode, and they run constantly as you found out. Have the relay replaced and you should be fine. As far as the AC, it is most likely related to your cooling fan problem.

In your lower underhood fuse block on the passenger side, there are three relays that control your fans. They go #3 , #2 , #1 (L to R I believe). #1 controls the primary cooling fan (driver’s side), #2 is the cooling fan control relay, and #3 is the secondary cooling fan (passenger side).

For an ’01 the freon charge should be about 2.2 lbs. Off the top I’d say that your problem sounds a lot like the a/c system needs a recharge. 7 people found this helpful. Almost forgot to mention that the a/c low pressure side sensor also provides an input to the body pcm.

The body computer switches the relay ground circuits on or off depending upon the various input values. If the relays are all functioning correctly, then you’ll want to check the engine coolant temp sensor, the wiring from the relays to pcm, and the a/c charge level.

What should low side pressure be on Chevy Impala?

7 people found this helpful. Almost forgot to mention that the a/c low pressure side sensor also provides an input to the body pcm. Also if memory serves on this; low side pressure needs to be at least 40 PSI in order for the pressure switch to send the signal to pcm.

7 people found this helpful. Almost forgot to mention that the a/c low pressure side sensor also provides an input to the body pcm. Also if memory serves on this; low side pressure needs to be at least 40 PSI in order for the pressure switch to send the signal to pcm.

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.

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.

Where is the relay on a radiator fan?

The fan relay is often located in the engine bay’s fuse box, but the best way is to check your repair manual to find where it is located. Testing a 4 pin relay is often very straightforward. Remove the relay and give 12 volts to pin 30 and 85. Ground pin 86 and check if there is voltage coming out from pin 87.

Why does my car have a radiator fan?

You probably already know the purpose of the radiator and the cooling system in your car. When you are driving fast, the wind is passing through the radiator to cool the coolant down without issues, but when you are driving slow, there is no wind pushed through the radiator. This is why we use a radiator fan.

What should coolant temp be when engine is shut off?

•After the vehicle is shut off if the engine coolant temperature at key-off is more than 117°C (243°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes. •Engine coolant temperature reaches 110°C (230°F).

You probably already know the purpose of the radiator and the cooling system in your car. When you are driving fast, the wind is passing through the radiator to cool the coolant down without issues, but when you are driving slow, there is no wind pushed through the radiator. This is why we use a radiator fan.

How can I tell if my radiator fan is working?

When a radiator fan works it usually makes a whirring sound that is easily noticeable. However, the radiator fan does not always start spinning on ignition. The ECU signals the radiator fan to work at the precise time. So, do not worry if the fan doesn’t immediately start working. Visually check the fan if you don’t hear its noise. 1. Broken Fuse

Why are the fans not running in my Chevy Impala?

Removing the wire from the temp sensor puts the fans into stay-alive mode, and they run constantly as you found out. Have the relay replaced and you should be fine. As far as the AC, it is most likely related to your cooling fan problem. In order not to increase engine heat, the AC is determining that it has to stay off to keep the engine cool.

Why are the fans not turning on in my Monte Carlo?

I have a 2001 monte carlo, the fans don’t come on until is almost in the red zone on the temp Guage, I’ve replaced the rad, water pump, thermostat, and both rad lines. Still over heats because the fans Dont turn on. How do u fix this? 26 people found this helpful.

Why does my car’s temp gauge keep going up?

Not knowing if the sender is reliable it defaults to fans on, in order to prevent a possible over heat. Change the T-stat. and while you are there change the sending unit as well.

What’s the low pressure sensor on a Chevy Impala?

Almost forgot to mention that the a/c low pressure side sensor also provides an input to the body pcm. Also if memory serves on this; low side pressure needs to be at least 40 PSI in order for the pressure switch to send the signal to pcm. 4 people found this helpful.

Why is my coolant temp gauge not working?

The coolant temp gauge gets its input from the BCM and the AC gets told to do its thing there as well. You could have anything from a dirty connector (“fretting”) to a failed BCM.

Why does my car keep running at a low temp?

Perhaps the computer suspects the temp sending unit is unreliable. The engine should be warm after running a few minutes but this is not being indicated by the temp sender. Not knowing if the sender is reliable it defaults to fans on, in order to prevent a possible over heat.

Why does my Chevy Malibu not turn on?

Took it to the Chevy dealership and let them have it for a couple days, of course, didn’t act up. Most of the time, if you would turn the car off and back on, it would start working again. Finally, after fighting it for months, I got a check engine light for a thermostat code.

Why does my AC not work when temp is low?

Under normal circumstances you would be right. The ECM provides both power and ground to the ECT which is a variable resistor so when system voltage starts dropping (which is a result of corroded battery terminals) the temp readings are incorrect and since system voltage is low the ECM cannot read them correctly either.

Why are my coolant fans not turning on?

If both fans operate then it is time to take a look at the pressure transducer. Don’t let this strange name fool you, it is simply a sensor that relays the amount of pressure in the system to the PCM and the PCM decides when to turn on the fans and or compressor clutch.

I have a 2001 monte carlo, the fans don’t come on until is almost in the red zone on the temp Guage, I’ve replaced the rad, water pump, thermostat, and both rad lines. Still over heats because the fans Dont turn on. How do u fix this? 26 people found this helpful.

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.

What can cause a Chevy Impala to overheat?

I had the misfortune of having the infamous GM leaking intake manifold gasket in my 2000 Olds Silhouette and it also started leaking VERY slowly from a corner manifold bolt. Thankfully, to the outside and not into the engine where the coolant mixes with the oil and if not detected immediately, can cause major engine damage.

What should the temp be on my Chevy Impala?

If you drive the car temp will go up after 10/15 min of driving. The fans come on,temp goes to where it shoud be 195, and after another 10/15 the same scenario happens. Temp goes to 210. I have replaced, new from GM, thermostat, water pump, the 3 fan relays, the two fans, all water houses,temp sending, and flushed the radiator.

How many times has the Chevy Impala been recalled?

The 2009 Chevrolet Impala has been recalled 5 times by NHTSA. View Recalls Reliability indicates how models have performed in the past, providing the basis for predicting how the vehicles will hold up in the year ahead.

What does the Na mean on a Chevy Impala?

NA indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year. Learn more about car Reliability. The Reliability score is based on our latest subscriber survey of 2009 Chevrolet Impala owners.

What is the reliability score of the Chevy Impala?

The Reliability score is based on our latest subscriber survey of 2009 Chevrolet Impala owners. The owner comments describe problems respondents experienced with this vehicle.

What’s the phone number for the Chevrolet Impala?

Please call Member Services at 1-800-333-0663 This version of the Chevrolet Impala was competitive in its class, but there were better choices. While ride and handling are sound, they lag behind those of many competitors. On the other hand, the revised interior is comfortable and has logical controls.

What should I do if my heater fan doesn’t work?

Replaced 10 amp fuse , blower relay,blower motor,dash s dash switch and switch out under the hood relays. Seems no power to anything when checked with a test light. Blower motor *resistor* been tested? ..

Why are the reverse lights on my heater not working?

In reading other problems that other people had , I just went out and checked if I have reverse lights and found out they also are not working. Someone in another article said it may be the netural safety switch if the reverse lights also do not work. You got it! ..

Is the 10 Amp Fuse on my heater fan burned out?

The 10 amp fuse was not burned out. The blower motor resistor was a little rusty.I inspected and found no burned or melted wires anywhere , at the inside three way dash switch , at the blower motor and at the resistor.I know the air bag is tied into the same fuse , I must have replaced the fuse 12 times .

Why is my a / C not working on my Chevy Impala?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my Chevrolet Impala has air conditioning problems?

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 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.

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.

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.

How does a radiator fan work when the AC is on?

The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. At higher coolant temperatures, the switch closes to start the cooling fans. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range.

Why does my AC fan not come on?

When the ac is of the radiator hoses both become same heat after a while and the overflow reservoir starts boiling over and the fan do not kick in. Any advise please. You might have an initial temperature sensor which causes the fan to come on when the temperature begins to rise; that sensor might be defective.

Can a bad coolant sensor cause a car to not start?

Some cars use the engine coolant temperature sensor to control the electric cooling fans. You have two separate temperature sensors for the fans, dashboard gauge, and engine management in most cars. However, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans won’t start at all.

Why does the radiator fan not come on when the AC is on?

In order for the AC Condensor to do its job it must stay as cool as it can. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem.

The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. At higher coolant temperatures, the switch closes to start the cooling fans. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range.

•After the vehicle is shut off if the engine coolant temperature at key-off is more than 117°C (243°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes. •Engine coolant temperature reaches 110°C (230°F).

If you drive the car temp will go up after 10/15 min of driving. The fans come on,temp goes to where it shoud be 195, and after another 10/15 the same scenario happens. Temp goes to 210. I have replaced, new from GM, thermostat, water pump, the 3 fan relays, the two fans, all water houses,temp sending, and flushed the radiator.

I had the misfortune of having the infamous GM leaking intake manifold gasket in my 2000 Olds Silhouette and it also started leaking VERY slowly from a corner manifold bolt. Thankfully, to the outside and not into the engine where the coolant mixes with the oil and if not detected immediately, can cause major engine damage.

When do the cooling fans start working on a Chevy Impala?

Do the cooling fans start working when it reaches the normal temp,like slow on one fan and then as needed the second fan, or they come, both at the same time, when hot. With the air cond on one fan starts and when normal temp is reach the other starts, keeping the correct temp.

How long does it take for Chevy Impala to go past normal?

With air on, car runs at normal temp, turn of the air and temp fluctuates between high and normal, it takes about 10 to 15 min for temp to start going past the normal operating temp. What is the cycle of these fans???.

What happens when I unplug the temperature sensor?

The fan still inst working, however if I unplug the temperature sensor the fan works from start up. The fan also works when the A/C is on. What could be the problem? have the same problem? Fan will default to on with no signal from the sensor, the only other item would be the fan control module.

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 are my radiator fans not turning on?

If the coolant temp isn’t hot enough it won’t turn them on at all. Unplugging the ECT sensor makes the ECU think the temp is cold which is why it turns them on.

The fan still inst working, however if I unplug the temperature sensor the fan works from start up. The fan also works when the A/C is on. What could be the problem? have the same problem? Fan will default to on with no signal from the sensor, the only other item would be the fan control module.

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.

Almost forgot to mention that the a/c low pressure side sensor also provides an input to the body pcm. Also if memory serves on this; low side pressure needs to be at least 40 PSI in order for the pressure switch to send the signal to pcm. 4 people found this helpful.

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Ruth Doyle