Question about 1995 Oldsmobile Cutlass Supreme

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The temperature of my car gets up to 200 cO and the fans never comes on at what temperature the fans comes on?

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Check out the coolant temperature sending unit, or possably the thermostat.

Posted on Dec 11, 2009


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I have a 1996 chevy lumina and the temperature gauge keeps moving around unpredictably. The fans wont come on. We checked the fuses and relay switch. Could it be the fan motor, or temperature gauge

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Temperature guage not working and engine overheated when stopped in trafic

The powertrain computer turns the fans on through the cooling fan relays, based on information from the coolant temperature sensor. The fans will only come on when the coolant temp. is pretty high-varies by manufacturer, but it is over 200 degrees, some as much as 230 degrees. So the fans will not come on when engine is started, but they should come on before the engine overheats. You should have them checked. Also find out if the temp. gauge sending unit is separate and different from the coolant temperature sensor-on most cars, they are separate, maybe not on yours?
Free advice from a shadetree-not worth a lot, eh? lol.

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When should your radiator fan turn, And how can you tell if it is turning when its supposed to?

Close to 200 degrees F...
If you have two fans, both will come on with a/c turned on.
I use a live data scanner to read the temperature sensor. The fan usually kicks on at 200 or up, and off around 190. A bad temperature sensor can cause a problem, that's why the scanner is good to use.

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My cooling fan will not come on by its self ,but it does if u turn on the a/c

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the electric fan will only come on if the coolant temperature is 200-210 degrees. if your car doesnt ever reach 200 then yes you have a bad thermostat. if it does reach high enough to turn on cooling fans then yes your temp sensor is bad.

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How do the cooling fans come on

They are electronically controlled, normally monitored by the ecu by the temperature sensor. They come on when the ecu determines the temperature to exceed the cooling capabilities of the coolant. usually about 190-200 degrees.

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1989 Nissan Maxima Radiator fans and Temp gauge not working.i have a 1989 Nissan Maxima and the radiator fans do not come on. I have replaced the Engine Coolant Temperature Sensor and this did not work....

-The radiator fan will be kick on ONLY when the temperature reach about 190-200. Depend on the sensor that you have now.
You can test it by boil it and hook up a digital multi meter to it.
and make sure use a temperature gage to test with, so you know how hot the water when it kick on.

Good luck

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