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 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

3 Answers

2,065

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

1 people found this helpful.
21,905

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.

21,905

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

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