A/c blowing hot in front cold in rear

Asked by Jamie Jun 30, 2023 at 08:52 AM

Question type: Maintenance & Repair

05gmc Denali a/c was working fine
son decided to add  freon to try get
colder for wat ever reason he over
charged system fan wouldn't work
blowed hot air now so I removed the
freon got it to were it needs to b
now system cold all the way to fire
wall but blowing hot out front vents
and rear air blowing very cold
removed heat cold door actuator
pass floor  no change still hot in
front cold in rear any suggestions or
anyone have this problem help
would be awesome ty

2 Answers
158,965

James answered about a year ago

The low side pressure should be 35 PSI with R134a refrigerant, engine running at idle, and fans on high. Beyond that, I agree that you should let a pro check it out. Hope that helps! Jim

Mark helpful

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