A/C rear vents are not blowing cold air?

2020 CHEVROLET TRAVERSE

50,000 MILES • V6 • 2WD • AUTOMATIC

CRIS9542

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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.

Jul 28, 2023 at 12:44 PM

JACOBANDNICKOLAS

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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 enlarge)

Jul 28, 2023 at 9:02 PM