A/C is cold then gets warm

Tiny
ANONYMOUS
  • MEMBER
  • 2006 GMC SIERRA
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 199,000 MILES
A/C will be cold and after a while (15 minutes to 1 hour) it gets warm. If I shut the truck off and back on it's cold again. This will work every time. The A/C is cold normally and when it gets warm the compressor is not on. If I shut the truck off for just a few seconds the compressor will kick on and it's nice and cold again. It could last 5 minutes or an hour. Some days it will work fine, normally when it is a little cooler out.
Thursday, March 5th, 2020 AT 9:36 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning,

Do you have a set of gauges to give me the high and low side readings?

If the low side pressure drops too low, the clutch will disengage and warm air comes out.

Roy
Images (Click to make bigger)
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Friday, March 6th, 2020 AT 5:19 AM

Please login or register to post a reply.

Related Air Conditioner Compressor Content

VIEW MORE