Question about 2002 Pontiac Aztek

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Running hot 2002 pontaic aztec .......running hot. the radiator fans only come on if the heater is blasting inside the car. i have checked all relays and sensors. i have flushed radiator and replaced the ect sensor. why is my car running hot and why doesnt my radiator fans work when my motor gets hot

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  • Anonymous Mar 13, 2014

    where is coolant tempreature sensor location

  • Anonymous Mar 15, 2014

    car gets hot and will shut off the fan does not kick on but when i turn on the a/c and look the fan is on but the min i turn off the a/c the fan shuts off

  • Anonymous Mar 17, 2014

    i have a pontiac grand am gt 99, the radiator fan doesnt work unless i disconect the temperature sensor, the fan motor is ok, the wire ok, i change the temperature sensor and 2 relays, but i cant fix the problem

  • Anonymous Mar 17, 2014

    i have a pontiac grand am gt 99, the radiator fan doesnt work unless i disconect the temperature sensor, the fan motor is ok, the wire ok, i change the temperature sensor and 2 relays, but i cant fix the problem

  • Anonymous Mar 30, 2014

    checked water pump,radiator,

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  • 53 Answers

Replace the therostat ( most likely )

and the radiator cap

Posted on Nov 30, 2008

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Sounds like Clutch in your fan

The coolant level is right on, no hoses are leaking and the accessory belt is intact. You start the engine, let it idle and make a visual inspection. There's no sign of belt slippage.
If your car is like most, the cooling fan is mounted to its drive pulley via a clutch. Clutch fans operate at different speeds under different conditions to help reduce drain on the engine and to save fuel. When the engine is hot, the clutch fan runs nearly as fast as the engine. When the engine is cold, the fan runs much more slowly.
The fan clutch operation is regulated by a valve that is opened and closed by a thermostatic spring. The valve controls the flow of a viscous silicone fluid between chambers in the clutch assembly. When the engine is cold, the clutch is essentially disengaged, which is why the fan runs at its slowest compared to the engine's speed. As the engine warms up, the air flowing to the fan assembly becomes hotter. The hotter air causes the thermostatic spring to unwind and open the valve. Silicone fluid from the reservoir chamber flows into the main chamber, engaging the clutch, and the fan spins faster (though it's still slightly slower than the engine.

Hope this helps!

Nov 30, 2008 | 2002 Pontiac Aztek

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