AC not blowing from the front vents

ALL4LO

MEMBER
2012 GMC ACADIA
V6
2WD
AUTOMATIC
67,000 MILES

Air is blowing from all vents except the ones in the front. Nothing is coming from them at all.

Tuesday, May 30th, 2017 AT 7:04 AM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

Hello,

It sounds like you have a blend door actuator that has failed which is common on these cars. Here is a diagram (below) and a guide to help you get the problem fixed:

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

1 - Mode Actuator

2 - Recirculation Actuator

3 - Blower Motor

4 - Blower Motor Control Module

5 - Air Temperature Actuator

6 - Evaporator Temperature Sensor

Please let us know what happens.

Cheers, Ken

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Thursday, June 1st, 2017 AT 11:53 AM

WRENCHSLINGER

MEMBER
1 POST

My rear blows fine but the front does nothing. I checked both actuators are working and the fuse is fine. I tried resetting the HVAC/ECAS by disconnected the battery but no change. Any other ideas would be very helpful. Thank you

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Sunday, September 9th, 2018 AT 12:55 PM

KEN L

MASTER CERTIFIED MECHANIC
42,940 POSTS

Hello,

There is an HVAC blower fuse that need to be checked for power, if that is good lets check the blower motor for power and ground. Here is a guide that will help also here are the blower motor and AC wiring diagrams so you can see how the system works and the fuse locations below:

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

and

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Please run this test and get back to us.

Cheers, Ken

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