Question about 2000 Buick Regal

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Air conditioner won't run

Even though the a/c light is on, the a/c runs for a short time , then goes off.when I lower the fan speed. Lately, it won't even start even though the light is on. Heater won't work .

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  • Anonymous May 06, 2009

    If it was a bad fan then it would not blow cold air on the Max setting. It only stops blowing when you lower the fan speed setting.

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  • 319 Answers

It sounds like you have a bad fan, they are typicaly easy to replace. Just find the old one either on the fire wall of your car or under the dash.

Posted on Mar 20, 2009

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Are there filters in a GU 2004 car air conditioner?


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probably find that the low speed fan resistor has burnt out or the vent control module is not operational

Jan 06, 2016 | Cars & Trucks

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3 speed fan barely changes speed


You are talking about your blower fan for the air conditioner and heater right? More information will be needed to solve the problem.

When you say it barely changes speeds, does that mean it doesnt speed up, or doesnt slow down? By that I mean, is it "stuck" on low, or high?

Most blower fans run at different speeds through the use of a multi-stage resistor built into the fan switch circuit. Low speed is a high value resistor, medium speed is a low value one, and high speed is the fan running without any resistance.

If your fan is running on high and doesnt seem to want to run on lower speeds, the resistor pack may be failing. If the fan is running on low speed only, it may be that the fan itself is beginning to fail, or that the lubricant in it has gotten gummy.

Dec 07, 2015 | Cars & Trucks

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I have a 2007 Toyota matrix and the fan that cools the motor will not shut off even when I turn the car off, this causes the battery to run down, any ideas what the problem might be


Does the fan really run until the battery goes dead?? OR are you afraid that it might run until the battery is dead?? In many cars, the fan will continue to run for a short time after you shut it off.... until the engine coolant is cooled to a certain point. It can also run for a while when you've been using your air conditioner. Now, if it is actually running continuously and won't turn off, there is a sending unit somewhere that isn't functioning correctly, either in your cooling system... or your air conditioning system. You're going to need to do some research and find out which sending unit might be the culprit..... or take it to the shop. They'll know what to do and can probably quickly fix it.

Dec 03, 2013 | Cars & Trucks

1 Answer

While running the air conditioner the Thermostat goes hot, when I turn the air conditioner off it goes back down. The low coolant light came on but the coolant is full. What else could it be?


To start with, you are talking about the temp gauge. The thermostat is in the engine.
The coolant system could be low or have air pockets and still look full.
First thing I would check is the cooling fan, then the coolant level.

Jun 30, 2012 | 1999 Ford Taurus

1 Answer

Water is over heating when air conditioner is running. Temp is fine when air conditioner is off. Changed radiator fluid and thermostat. Fan is running and water pump seems to be ok.


My suspicion is that the fans may be coming on but they are not picking up speed when you turn on the A/C. Your car would have some of relay to control the speed of the fan whenever the A/C was turned on. This relay system would also increase the speed at which the fans run when the engine heat turns them on too.

Try starting the car cold and turning on the A/C right. Even though the engine is cold the rad fan should start up when you switch on the A/C. Once the engine gets hot the fan speed should increase accordingly when you switch on the A/C.

I'm not familiar with how Chrysler makes this work so I'm unsure what to repair but this is most likely your problem. Hope this helps.

Aug 14, 2011 | Chrysler PT Cruiser Cars & Trucks

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How did you know when the cooling fans are not working


You may have one conventional belt-driven fan with a thermal clutch and the other electric or, both could be electric on your car.
The cooling fan that operates during non-AC operation (just a running engine) if electric, will be controlled by a thermal switch in the lower radiator tank and may not turn on at all unless the engine is warmed up. The belt-driven fan should be turning at some speed all the time if the engine is running and at much higher speed with a hot engine.
The fan that cools mostly when the AC is operating won't run under normal operation but may turn on in hot weather (or when the engine is under heavier loads) even without the AC operating.
Checking them would require having a warmed-up engine and the AC turned on. Both fans regardless of type should be turning then.

Jun 03, 2011 | 2000 Mercury Cougar

1 Answer

My air conditioner fan speeds have all stopped working except for 5. Any ideas what is causing this? The vehicle is a 2002 GMC Envoy.


Yes,it is the blower resister,it controls all the speeds to the blower motor,it is located near the blower motor,and it might have a wire harness that is burned up too,replace it,and the wire harness,and the blower motor,the blower motor is what causes the resister to fail,it draws too many amps,even though it might sound good,and run fine,it is requiring to many amps to run it.If this was at all helpful,please rate,thank you.

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1 Answer

Air conditioner goes off when fan speed is increased


when it's on 'auto', the fan adjusts according to the temp in the car and the temp setting you have it set at. try setting the auto temp control down to 65, then hit the "-" one more time to send it to "LO" - the fan should automatically jump up to max.

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