A/C rear vents are not blowing cold air?

CRIS9542

MEMBER
2020 CHEVROLET TRAVERSE
V6
2WD
AUTOMATIC
50,000 MILES

Driver and passenger vents are blowing cold air, but rear vents are not blowing cold air. Only blowing warm air. I recently took it to a shop, and they stated that the condenser had a leak but I took it to another shop and they stated that there was no leak since the front vents were working. The 2nd shop did an A/C vacuum and recharge but by the time I got home the back vents were no longer blowing cold air.

Friday, July 28th, 2023 AT 12:44 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,077 POSTS

Hi,

If the system worked properly after being recharged, I suspect the first diagnosis was correct and there is a leak in the auxiliary evaporator. By the time you got home, the charge was lost.

By chance, when they recharged the system, did they add a dye to the system to help locate a leak? Let me know. Checking for a leak usually requires specialized tooling. I attached a link that explains how it's done. Also, I attached a pic below of the auxiliary evaporator core.

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

Let me know.

Joe

See pic below.

Image (Click to make bigger)