Question about 1994 Acura Legend

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Cooling fans don't come on at operating temp.

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Check the cooling fan relay?

Posted on Jun 26, 2009

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Cooling fan relay location for a 1992 corvet


the air con fan comes on with the air con switch. the engine cooling fan comes on when the engine temp. censer reaches operation temp. most times the air through the radiator when driving is enough to keep the censer cool and the fan not working if you stop at lights for any length of time it will come on.

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If the check engine light is not on, I would want to check the computer with a scanner to see what the temp sensor is telling the computer the coolant temp is. The problem could be in the computer or the fan relay.

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I just change new radiator and radiator cap on 2000 nissan quest .go on freeway .and know temp gauge very high i stop the car wait and run again ,now see a gauge go high and drop down to normal ,what is...


Make sure that the cooling system has the proper amount of antifreeze and that the fluid is full by checking and filling, if needed, by filling the reserve to the proper level. Then make sure that the cooling fans are coming on. Best test is to allow the engine to come up to operating temp while you observe the cooling fans. If they don't come on by the time the temp gauge is half way, try turning on the air conditioning to high. That should turn the fans on. If not check the cooling fan relay or module. Dan

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What makes the cooling fans turn on?


there is a temperature sensor that feeds the ecm(computer)a signal to let it know if the motor requires cooling operation at a predermined temp,which the ecm sends a signal to the cooling fan relay to turn on the cooling fans.when the temp lowers to a predetermined temp the signal is turned off to the ecm and the ecm turns off the signal to the fan relay to turn off the cooling fans.

Sep 18, 2011 | 2000 Pontiac Grand Am GT

1 Answer

I have tested the cooling fans and they work but when temp is half the fans wont come on where are the fan relays


the cooling fan relays are in the under hood fuse box . they should be marked on the inside cover of the fuse box lid . The cooling fans should operate around 215 to 230 degree's (when the car is stop at idle ) the fans should also operate when you turn on the a/c . the cooling fans relays recive a signal from the PCM (power train control module) to be commanded on The PCM use information it receives from the coolant temp sensor

Mar 16, 2011 | 1997 Buick Century

1 Answer

The engine cooling fans in our 2003 Buick LeSabre LTD don't shut off when speeds over 25 MPH are reached.


There is nothing to worry about. The cooling fans do not operate by engine speed, but rather engine temp. If the fans stopped working, then there would be a problem with either the cooling fan relays or the temp sensor which operates the fans. Otherwise, you are fine.

Jun 06, 2010 | 2003 Buick LeSabre

1 Answer

A/c compressor won't engage and the cooling fan not operating


The cooling fan does not come on until the engine temp reaches 229 degrees. it is controlled by a cooling fan relay. Cheeck for power at the fan motor and check the relay. The A/C. If yuor a/c system is low on freon the low pressure switch on the accumulator will not complete the circuit for the clutch. Check the charge, voltage present at the clutch or the low pressure switch. You can install a jumper in place of the switch to test.

Mar 29, 2010 | 1989 Oldsmobile Cutlass Supreme

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My 1998 buick regal non turbo 3800 radiator cooling fans will not work when the car gets to operating temp. The fan motors will work whtn the AC is on. I think it could be the temp sensor that turns on the...


the electric cooling fan for the radiator will not turn on when the engine reaches normal operating temp, its only supposed to come on if the engine temp goes over the normal temp. (around 220 degrees)
it is normal for the fan to come on any time the a/c or defroster is turned on.

Oct 12, 2009 | 1998 Buick Regal

3 Answers

Coolig fans dont run


the cooling fans are run by a relay it's located in the junction box. check this. there is also a thermoatic sensor located near the fans next to radiator. the fans should free spin when the engine is off this is a good indiacator that it's not the fan themselves. if the relay checks out(run engine and switch the fan relay with the a/c clutch relay when the engine reaches 180 degrees you will feel the upper radiator hose get hot the fans will turn on a short time later iof they don't it's the temp sensor near the radiator if they do it's a bad relay...please rate this thanks

Sep 28, 2008 | 1994 Pontiac Grand Prix

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