Passenger and rear A/C blowing hot

Tiny
SOUL2FLY7
  • MEMBER
  • 2014 GMC ACADIA
  • V6
  • 80,000 MILES
Driver side blows cold while the passenger side and rear blow hot. My blend door looks to be actuating normally. Another thing I noticed, the driver side does blow hot sometimes and then I recharge the A/C line then it's back to normal for a few days. Then it's repeats. Not sure if it's related.
Saturday, July 31st, 2021 AT 9:46 AM

5 Replies

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

The first thing you need to do is have the Freon system checked. You have a leak and that may be the entire issue.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

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

You need to add dye to the system and use a bright LED light to locate the leak. Once it is determined, repairs need to be done and then the system is evacuated and charged to the proper level.

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

This is where you start.

Roy
Was this
answer
helpful?
Yes
No
Saturday, July 31st, 2021 AT 12:15 PM
Tiny
SOUL2FLY7
  • MEMBER
  • 3 POSTS
Thanks Roy. Sorry, I should have given this detail originally. The last recharge I did was R134a with dye. Ran the UV light at night on all the lines, fittings compressor, and condenser. I can't easily get to the rear or front evaporator coil to check tho. Didn't see anything. Of course I could have missed something.
Was this
answer
helpful?
Yes
No
Saturday, July 31st, 2021 AT 3:28 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Yes, you did. Freon does not just go away. It leaks out and that leak needs to be found and repaired.

How much Freon did you add?

Roy
Was this
answer
helpful?
Yes
No
Saturday, July 31st, 2021 AT 4:41 PM
Tiny
SOUL2FLY7
  • MEMBER
  • 3 POSTS
If "Freon does not go away" why does how much I added have anything to do with it? Do you want me to weigh the can before and after next time?
Was this
answer
helpful?
Yes
No
Sunday, August 1st, 2021 AT 1:13 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
The system requires an exact amount in order to work correctly. When it gets low it comes from a leak.

You need to recover all the Freon, evacuate the system for 45 minutes and add the exact amount required for the system. Then you test the pressure to see if the system is working correctly.

Roy
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Sunday, August 1st, 2021 AT 1:25 AM

Please login or register to post a reply.

Related Air Conditioner Blows Hot Content

VIEW MORE