Rear A/C blowing hot air

Tiny
CASSANDRACAPORALE
  • MEMBER
  • 2008 CHEVROLET SUBURBAN
  • 4WD
  • AUTOMATIC
  • 12,000 MILES
The A/C blows cold in front but hot in back.
Please help.
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Friday, July 9th, 2021 AT 1:20 PM

1 Reply

Tiny
KASEKENNY1
  • EXPERT
This could be a number of things but the most likely cause is the rear blend door is not operating.

Here is a guide on how to replace a front actuator so that it will help with some info but clearly this is going to be in the rear for you:

https://www.2carpros.com/articles/replace-blend-door-motor

Below you will find the process from the manual on how to replace this and perform a calibration.

This is assuming that the front is operating properly at proper temps. There is a chance that the system being weak can cause the front to work for a short time after the rear stops. If you want to, you can check the pressures just to be sure the system is not low.

Here is a guide that will help with this:

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

Please run through this info and let us know if you have other questions. Thanks
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Saturday, July 10th, 2021 AT 3:27 PM

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