AC cycling switch?

Tiny
ZDAILY
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 300,000 MILES
I pulled out the controller and have 4.9 on the request, but upon cycling the switch, the charge will deplete and show 4.9 on or off. Controller?
Tuesday, April 7th, 2020 AT 8:35 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The controller will send a signal no matter what the charge. The other side of the switch goes to the ECM for grounding of the sensor. When the ECM sees a signal from the high and low pressure sensors, it will ground the relay and the compressor will come on.

Check for power on the other side of the high pressure sensor with it connected.

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

Losses charge? Sounds like you have a Freon leak in the system.

https://www.2carpros.com/articles/air-conditioner-leak-detection

Roy
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Friday, April 30th, 2021 AT 4:07 PM

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