It will overheat if A/C is off, what can it be? I. Checked relays, they're fine, new water pump, hasn't been overheated.
Feb 23, 2022 at 8:13 PM
Overheating
1997 CHEVROLET LUMINA
MTORRES227
- MEMBER
- 3 POSTS
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Hello!
It sounds like at least one of the cooling fans may have failed or may not be energizing whenever the air conditioning is not switched on. There also could be a problem within the cooling system circuits that is preventing the fans from running.
Here are a couple of repair guides and a video tutorial that may help you further diagnose the overheating issue:
https://youtu.be/Hlna_kUt7As
https://www.2carpros.com/articles/engine-overheating-or-running-hot
https://www.2carpros.com/articles/how-an-electric-cooling-fan-works
I've attached a schematic for the cooling fans and relays, along with removal and installation instructions for the cooling fans, if needed (below).
Please let us know what you find.
Thanks, Wendy W
It sounds like at least one of the cooling fans may have failed or may not be energizing whenever the air conditioning is not switched on. There also could be a problem within the cooling system circuits that is preventing the fans from running.
Here are a couple of repair guides and a video tutorial that may help you further diagnose the overheating issue:
https://youtu.be/Hlna_kUt7As
https://www.2carpros.com/articles/engine-overheating-or-running-hot
https://www.2carpros.com/articles/how-an-electric-cooling-fan-works
I've attached a schematic for the cooling fans and relays, along with removal and installation instructions for the cooling fans, if needed (below).
Please let us know what you find.
Thanks, Wendy W
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Feb 24, 2022 at 5:26 AM
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