A/C gone out on one side of vehicle

[CPA]

Have an Avalanche that has dual climate control. The passenger side only blows out warm/hot air. What's the first couple of things I can check or perform myself instead of taking it into the shop?

 

[iamwiz82]

As I understand it, dual climate control is usually done by cooling the air to the lowest setting between the two via AC and then re-heating the air via a smaller heater core, one on each side.

 

[JMWarren]

It could be at best an electronic problem at worst broken blend door or actuator. The dash may have to be pulled....

 

[AnonymouseUser]

Originally posted by: JMWarren
It could be at best an electronic problem at worst broken blend door or actuator. The dash may have to be pulled....

Could even be as simple as a bad switch...

 

[ballmode]

Check your a/c for mice

 

[jme5343]

Originally posted by: JMWarren
It could be at best an electronic problem at worst broken blend door or actuator. The dash may have to be pulled....

X2. The GM regals have a similar problem. The cog in the blend door actuator is prone to breakage and the door gets stuck. It's tough to feel sorry for you. I only WISH I could use A/C this time of year 😉

 

[Rock Hydra]

Originally posted by: ballmode
Check your a/c for mice

:laugh:

 

[snoturtle]

Had a similar issue on a Town and County
Ended up just being the switch that controls heat/cold for each side

had to replace the whole panel to fix the switch though