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

Tiny
AZREDNECK
  • MEMBER
  • 1999 CADILLAC DEVILLE CONCOURS
  • 4.6L
  • V8
  • AUTOMATIC
  • 120,000 MILES
I replaced left side cooling fan it runs about 10 mins then stops?
Thursday, July 13th, 2023 AT 12:49 PM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
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.
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Thursday, July 13th, 2023 AT 5:51 PM
Tiny
AZREDNECK
  • MEMBER
  • 6 POSTS
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.
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Friday, July 14th, 2023 AT 8:43 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
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
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Friday, July 14th, 2023 AT 9:44 AM
Tiny
AZREDNECK
  • MEMBER
  • 6 POSTS
Thanks, I will replace it.
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Friday, July 14th, 2023 AT 10:08 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
Please let me know if that solves the problem, have a good weekend.
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Saturday, July 15th, 2023 AT 10:12 AM
Tiny
AZREDNECK
  • MEMBER
  • 6 POSTS
  • 1999 CADILLAC DEVILLE CONCOURS
  • 2.6L
  • V8
  • 2WD
  • 120,000 MILES
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.
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Monday, July 17th, 2023 AT 9:55 AM (Merged)
Tiny
KEN L
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What happened after the thermostat was replaced?
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Monday, July 17th, 2023 AT 9:56 AM
Tiny
AZREDNECK
  • MEMBER
  • 6 POSTS
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.
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Monday, July 17th, 2023 AT 10:47 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
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.

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Tuesday, July 18th, 2023 AT 10:00 AM

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