A/C turns off

Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 125,000 MILES
As soon as I turn my A/C on, it turns off.
Monday, August 13th, 2018 AT 2:34 PM

15 Replies

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

What turns off? The compressor or the blower motor?

Roy

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

https://www.2carpros.com/articles/low-or-no-air-flow-from-vents
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Monday, August 13th, 2018 AT 3:43 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 41 POSTS
I do not now, the dash just says AC off.
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Tuesday, August 14th, 2018 AT 9:57 PM
Tiny
ASEMASTER6371
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That is the compressor.

You would need to check the Freon system. You will need a set of gauges to see if there is enough pressure in the system for it to work. If you do not have enough pressure, the system will switch off to protect the compressor.

Roy

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

https://www.2carpros.com/articles/air-conditioner-leak-detection
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Wednesday, August 15th, 2018 AT 3:31 AM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 41 POSTS
Do you mean I need to put Freon in it?
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Wednesday, August 15th, 2018 AT 10:41 AM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 41 POSTS
Thanks.
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Thursday, August 16th, 2018 AT 9:59 AM
Tiny
ASEMASTER6371
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Yes, you need to add Freon.
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Thursday, August 16th, 2018 AT 10:20 AM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 41 POSTS
I added two cans of Freon and the pressure gauge never moved, stayed at zero. The compressor was running. The dash still red A/C off.
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Thursday, August 16th, 2018 AT 7:23 PM
Tiny
ASEMASTER6371
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Okay, the next step is you need a set of gauges to see what the pressures are on both the high and low side.

The gauge on the can is not telling us anything. You can rent a set of gauges at a parts store or you can buy a cheap set at Harbor Freight.

Roy
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Friday, August 17th, 2018 AT 6:25 AM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 41 POSTS
I cannot use the gauge that came with the can?
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Friday, August 17th, 2018 AT 11:14 AM
Tiny
ASEMASTER6371
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No, that does not tell me the high side that I need to see. You need a set that can read the high and low side pressures.

Roy
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Friday, August 17th, 2018 AT 11:57 AM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 41 POSTS
What are the gauges called?
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Friday, August 17th, 2018 AT 6:12 PM
Tiny
ASEMASTER6371
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Air conditioning test gauges. You can rent them at a parts store.

You can also buy a set a Harbor Freight.

Roy
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Friday, August 17th, 2018 AT 6:13 PM
Tiny
ASEMASTER6371
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You are welcome.

Keep us updated.
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Saturday, August 18th, 2018 AT 11:30 AM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 41 POSTS
Okay.
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Saturday, August 18th, 2018 AT 11:32 AM

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