Cooling fans not working

1997 CHEVROLET LUMINA
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JPALKENS
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  • 1 POST
The engine cooling fans do not operate at elevated coolant temperature levels. To run the fans I have to switch the climate control to A/C to bring the temperature down. If I disconnect the coolant temperature sensor on the engine block the fans will run regardless of the coolant temperature. Is this an ECM problem, if so how can I cure it?The fans don't run even when the temperature gauge is in the 'red' zone.
Nov 4, 2010 at 9:51 AM
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STRAILER
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Hello,

What happens is the temperature sensor goes bad due to heat and engine vibration and needs to be replaced.

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Here is a guide that will show you what you are in for when doing the job with a diagram (below) of what is like on your car.

Please let us know what happens.

Cheers, Ken
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Apr 6, 2021 at 7:53 PM
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