After replacing the left side cooling fan, it runs for about 10 minutes then stops?

1999 CADILLAC DEVILLE CONCOURS
120,000 MILES • 4.6L • V8 • AUTOMATIC
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AZREDNECK
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I replaced left side cooling fan it runs about 10 mins then stops?
Jul 13, 2023 at 12:49 PM
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STRAILER
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We need more details, is the engine overheating? Do you have a check engine light on? Is the fan running with the engine on or off? This cooling fan operation could be normal.
Jul 13, 2023 at 5:51 PM
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AZREDNECK
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Yes, it is running hot and the check engine light only after it overheats. It is left driver side fan new just replaced. I start up the car, turn the A/C on check both fans working after about 5 minutes. left fan stops and right A/C fan still works. Had a block test everything okay. Could thermostat be stuck closed? Thanks for your input.
Jul 14, 2023 at 8:43 AM
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STRAILER
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Yes, a stuck thermostat can cause this problem. Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/replace-thermostat

Check out the images (below). Please let us know how it goes
Jul 14, 2023 at 9:44 AM
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AZREDNECK
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thanks, i will replace it.
Jul 14, 2023 at 10:08 AM
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STRAILER
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Please let me know if that solves the problem, have a good weekend.
Jul 15, 2023 at 10:12 AM
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AZREDNECK
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My left side fan only comes on when i turn on A/C. Then it stops after about 5 minutes. and will not come back on. the right side A/C fan keeps running.
Jul 17, 2023 at 9:55 AM (Merged)
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STRAILER
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What happened after the thermostat was replaced?
Jul 17, 2023 at 9:56 AM
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AZREDNECK
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I am still having problems, so the next step is to take it to a mechanic. Thanks for trying to help me. He will have the tools to find my problem.
Jul 17, 2023 at 10:47 AM
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STRAILER
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Did you replace the thermostat? Also, we should run the codes to see what comes up. It could be the engine coolant temperature sensor.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing


Here is the engine coolant temperature sensor location in case a code comes up for it.

Check out the images (below). Please let us know what you find.

Jul 18, 2023 at 10:00 AM