2011 Acadia,passenger side blows cold, drivers side blows hot

SOURCE: 2004 duramax dual climate control the driver side blows cold

Thankfully it was the drivers side controller! I found the temp control actuator located under the dash almost on the floor. I removed the four screws that held the cover in place then followed the wires to the actuator. removed the wiring harness then the two screws. replace with new part and heat works again!

SOURCE: Changed batteries and climate control not working properly

The actuator has gone bad. They can be programed, and reset, but usaly they are bad, and that will only patch the problem for a while.

SOURCE: blows hot and cold-restart and problem disappears for a while

you need a servicing of the ac condensor, also check that the blower is working or not. your problem will be solved by servicing the condensor.

SOURCE: AIR CONDITIONER ONLY BLOWING COLD ON ONE SIDE AFTER DISCONNECTING BATTERY

Turn your AC off. Turn the car off Crank the car turn ac on drivers side to 60 passenger side to 90 press auto wait 1 minute turn AC off (very important) turn car off turn car back on switch driver's side 90 passenger 60 press auto wait one minute turn AC off( very important) turn car off turn car on AC 70 both sides press auto your ac should be blowing cold If not, you have an expensive problem

SOURCE: 2004 GMC Yukon blows hot air out of the driver

Probably the left temp actuator. The wires in the right I/P junction block could have poor tension also, but it's usually the temp actuator.