Is there a check valve behind the A/C pressure cycling switch or do I have to drain down the system to change it?

Asked by MARYWOLFE Jul 04, 2012 at 03:04 PM about the 1993 Chevrolet C/K 1500

Question type: Maintenance & Repair

1993 CHEVY C1500 SUBURBAN
350/AUTO
2WD

5,165

Kevin answered 11 years ago

the low preesure cycle switch does have a check valve under it , yes

1 people found this helpful.

Mark helpful

60,505

Andrew answered 11 years ago

Unsure of your question but yes. There are valves on the ac system used to charge and evacuate it. Letting the refridgerent into the atmosphere is illegal, stiff fine from the EPA.

Mark helpful

60,505

Andrew answered 11 years ago

Re-read the question. There is no way to change a part of the ac system without removing the refridgerent.

Mark helpful

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Is there a check valve behind the A/C pressure cycling switch or do I have to drain down the system to change it?

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Is there a check valve behind the A/C pressure cycling switch or do I have to drain down the system to change it?

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