Ac stopped blowing cold?

2010 GMC ACADIA
3.6L • 4WD • AUTOMATIC
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CAMRYN RENO
  • MEMBER
  • 1 POST
AC stopped blowing cold after engine got a bit too hot. The clutch fuse was burnt, but after replaced it holds. Clutch engages, I have a gauge manifold attached to both high and low ports to give me readings high starts at 140 and gets to 180 when clutch engages and the low starts at 75 and gets to 30 when engaged and the clutch stays on between 8-4 seconds
There is also a hiss noise near the dash that I can hear through the vents when the clutch engages
Sep 22, 2026 at 10:09 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,540 POSTS
Yep, those pressures are too low, the system needs a recharge. The high side should be about 240 psi and the low should be about 45 psi when the system is running. This video will help.

https://www.youtube.com/watch?v=4EqdrBVb0sY

Let me know how it goes.
Sep 23, 2026 at 5:31 PM
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