Question about 2002 Pontiac Grand Prix

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Engine fan and air condition fan not turning on why

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Replace the cooling fan relay

Posted on May 16, 2010

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Posted on Jan 02, 2017

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1 Answer

I have 2006 Toyota Noah how long should my radiator fan run


I am not familiar with your model, but the "rule of thumb" is :
The radiator fan "to cool the engine" will run until the engine temperature has cooled sufficiently to allow the temperature sensor to kick off.
(That temperature sensor is screwed into the engine block.)
This may be as little as a minute to as many as 5-8 minutes.
If your car had air conditioning, that would be yet another fan, that should run only when the air conditioning is turned on.

Jan 01, 2017 | Toyota Cars & Trucks

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Heater not working in extreme cold weather because fan wont shut off. fan has been replace and the computer has been checked. nobody knows what is wrong


I'm making some assumptions, here.. I've been told I make too many assumptions... but, I'm assuming that you're talking about the engine cooling fan.. If I'm correct in this assumption, my guess is that you've not taken the vehicle to a good, reputable mechanic or repair shop. There are several reasons that an engine fan would not turn off, and each reason would have to come from a qualified mechanic. For example, there is a sending unit for the air conditioning system that might cause continuous running... or a sending unit in the air conditioning system that could cause the same thing. To complicate that issue, quite likely your air conditioning system purposely kicks on the engine fan any time you run your defroster. Also, your inside heater should function correctly, regardless of the engine fan running continuously. If I'm wrong on that score, then your engine has a thermostat problem "to boot"... which, by itself, could cause poor heating of the inside of the vehicle. NOW, backing up a little, if you so happen to be talking about the fan INSIDE the vehicle that is part of your heating OR air conditioning, we have a little different matter on our hands... First, some vehicles legitimately have a fan running on slow speed at ALL times.. for continuous air circulation purposes (sometimes, you can't actually hear this). Also, I might add that THIS fan running all the time should not be a problem for the heater to work properly.

Jan 03, 2014 | Cars & Trucks

1 Answer

The fan wont work car does not get hot shut off


cooling fan works on a temp sensor in the engine block. it only turns on when the temp reaches a set limit and shuts off when it gets below a set limit.. cooling fan components are , fans, fan relay , and temp sensor . best way to test the fans would be to let the car set running and watch the temp till it goes up to 185 -195 deg. at this time the fans should turn on and the thermostat should open and cool the engine back down. also when ever the air conditioning is on so should the cooling fans be on. if the fans do not run the check all components till you find the broken one. fan relay and air conditioning relay are separate but work the same. and will interchange

Dec 18, 2013 | 2001 Dodge Neon

1 Answer

Fan will not turn off


which fan? Interior fan, or radiator cooling fan? Is it the radiator cooling fan, or the fan controlled by the air-conditioning?

Run the vehicle, turn on and off the air-conditioning to identify which of the fans in the engine bay is the one triggered by the air-con and which is the primary cooling fan.
If the primary cooling fan is permanently engaged, then first try replacing it's relay as it may have fused closed.

Oct 29, 2012 | 2005 Cadillac Escalade

1 Answer

Ticking clacking noise gets a lot louder when air conditioning fan is turned to high, is this normal?


look at your idler pulley since the ac clutch runs on the serpintine belt its moving alot faster the berings are prob bad in it takes 10 minutes to take off and 17 dollars to replace n another ten but if you take it off spin it in your hand if its rubbing n stopping fast(should spen fast like a skateboard wheel) then its bad that could be all it good luck hope this helps

Aug 26, 2012 | Chevrolet Cars & Trucks

1 Answer

My lancer 2004 when I start the the engne the fan is running right away even the radiator is still cold and when the engine is turned of the fan is still running for aobut 3 to 5 seconds before it finally...


engine thermostat is a triggering devise to make the fan's work. seconds before it stop when the engine is off, normal for the engine high temperature but it's sign abnormality in the system. fans also runs when the air conditioning unit is "on" to keep the engine operating temperature for its additional load from the unit. need to check if the air conditioning is in "on" position, especially the engine thermostat it may be stuck.

Mar 01, 2011 | 2004 Mitsubishi Lancer

1 Answer

Where is the air conditioner blower fan relay on 1996 Jeep Grand Cherokee located?


The blower fan relay is located in the fuse box on the driver's side fender-well. A Jeep Cherokee uses an electric fan as an auxiliary fan for engine cooling and for cooling the air conditioning condenser when the air conditioning is in operation. A radiator temperature-sensing switch that activates the fan relay at 198 degrees F turns the fan on and controls its operation. The temperature drops when the vehicle is in motion and the switch turns the fan off. When the air conditioning system is in operation, the air conditioning relay supplies power to the fan relay via a fan diode downstream from the ignition switch. This diode activates the fan relay and keeps the fan operating as long as the air conditioning is on. Thanks. you can rate this solution and show your appreciation.

May 18, 2010 | Cars & Trucks

1 Answer

1987 Toyota Celica overheats when air conditioning is turned on


Hi

The first thing to check is that the engine cooling fan comes on when you turn on the air conditioning, then you should check the condition of the radiator fins. If they are clogged with debris (dead insects, leaves, etc...) then you will need to get a pressure washer onto it through the front grill and try to blast it clear.

When you switch on the aircon, it puts extra stress on the engine, which causes the fuel economy and engine power to drop, and as a result the engine will naturally run hotter, so it needs a bit of help to cool down in the form of the engine cooling fan.

Regards

Geordie

Jun 09, 2008 | 1987 Toyota Celica

1 Answer

1994 Hyundai Excel Air conditioning RADIATOR´S FAN works always very fast


this not really a problem as the fan speed is controlled by the high preasure switch in the ac system the hotter it is outside the higher the preassure will be in the system as hot as its been the preasure is high already when the compressor cycles it pulls suction on one side and outputs high preasure on the other the fans cool the condenser the higher the ambient temp the faster they go so all is fine...

Jun 08, 2008 | 1994 Hyundai Excel

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