cooling fan does not come on until 225?

2000 CHEVROLET CAVALIER
14,500 MILES • 4 CYL • FWD • AUTOMATIC
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DALEADAMSON
  • MEMBER
  • 1 POST
my cooling fan does not come on until 225 degrees and does not run when engine is turned off. I have replaced the thermostat, inline sensor, and the relay switch
Apr 15, 2010 at 1:02 PM
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SQM
  • ✓Experienced Mechanic
  • 6,383 POSTS
Hello,

The thermostat is designed to open at 180F, so your engine should not get to 225F.

How are the measuring the temperature?
Are you going by the temperature gauge?

Since you have already replaced all the related parts, only thing left is the gauge.
You might have a faulty gauge that is reading higher than the actual temperature.

https://www.2carpros.com/articles/engine-cooling-system
https://www.2carpros.com/articles/how-an-electric-cooling-fan-works
https://www.2carpros.com/articles/how-an-engine-thermostat-works

Please let me know of any questions.

Thank you.
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Aug 6, 2021 at 12:23 PM
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