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Air conditioning stopped blowing cold air

Tiny
KEVINJAMES
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 177,000 MILES
A/C was blowing cold for awhile then all of sudden it's not cold. 10 amp fuse was burnt and then I put a new 10 amp fuse it blew cold for 5-10 minutes then fuse burnt again. I put a 15 amp that also burnt I put a 30 amp that burnt also. Compressor was changed a month ago everything was fine until now. What causes that to happen?
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Saturday, July 25th, 2020 AT 6:29 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

You never, never ever put a higher amp fuse in a circuit. You may have cause wiring damage from the 30 amp fuse. The wire will overheat from the excess current flow in the wire.

Anyway, can you tell me the fuse number or what it was marked in the fuse block?

I attached a wiring diagram for you to view. Can you tell me which 10 amp fuse failed?

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Roy
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Saturday, July 25th, 2020 AT 8:33 AM
Tiny
KEVINJAMES
  • MEMBER
  • 3 POSTS
Red 10 amp fuse AC/ RLY that's the fuse that burns out. I have a 3.4 liter engine.
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Saturday, July 25th, 2020 AT 3:53 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
In the diagram I sent, both are marked. Can you give me a fuse number or if it says coil or load?

It makes a difference in the testing and possibilities.

Roy
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Saturday, July 25th, 2020 AT 3:57 PM
Tiny
KEVINJAMES
  • MEMBER
  • 3 POSTS
Coil.
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Saturday, July 25th, 2020 AT 4:55 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, can you remove the relay and put a new 10 amp fuse in and test for power to the relay? There should be 2 powers with the key on.

Roy
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Saturday, July 25th, 2020 AT 5:08 PM

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