Where is the climate control computer located?

KAM0110

MEMBER
2011 CHEVROLET SILVERADO
4.8L
V8
2WD
AUTOMATIC
225,000 MILES

The problem now is the compressor comes on for 20-30 seconds and shuts off. Then the cooling fans come on. They are supposed to run together but are not. When one shuts off the other comes on and vice versa. What could the problem be! I'm at a loss. Fuses good. Relays good. Serpentine belt good. I wasted way too much money on valves and Freon at this point. When I had it diagnosed, they said blow motor and resistor. I replaced both of those and it has gone downhill since. Replaced July 6, 2021. Now blows straight hot air. And now, I have a compressor problem.

Wednesday, June 22nd, 2022 AT 12:15 PM

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

This sounds like a compressor that is short cycling. So, this means we must start with checking the pressures of the high and low side.

Basically, we need to find out what these are before we do anything else.

Here is a guide that will help with this:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

If we don't know what the pressure is, then we are just going to be guessing so let's start with this.

Then I am attaching a chart below that will help with finding an issue with the pressures.

Let me know if you have questions.

Thanks

Image (Click to make bigger)