One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet Avalanche 1500
Average mileage: 120,738 (16,200–225,000)
42 people reported this problem
26 people shared problem details
2004 Chevrolet Avalanche 1500119,000Visitor
when air is on,suddenly it switches to full heat.If i stop and turn the engine off then restart the air works again.
2004 Chevrolet Avalanche 1500108,000Visitor
Intermittantly, hot air comes thru driver's side when all selectors are off. This can happen when A/C is on also, but passenger side is cold. No codes come up on computer when checked. Replaced driver's side actuator door once with an after-market product. It's still doing it. Temp fixes include turning off engine and restarting; turn knob to defrost to redirect air; and recently found that pressing the recirc button helps too while driving. Does the driver's actuator door need to be replaced again? Does it need to be a GM part?
After battery removal air will only blow through defrost vents.
climate dual control both sides down to cold ac switch is on .blows cold air to passenger hot air on driver. not fixed yet . looking for repair shop
2004 Chevrolet Avalanche 150085,000Visitor
Dual zone air delivery - one side blows a/c cooled air and the other blows heated air in spite of temp control settings
With air conditioning on, sometimes blows hot on passenger side, cold on driver. Sometimes opposite. Turn off engine, restart sometimes let's air conditioning work again
2003 Chevrolet Avalanche 1500160,000Visitor
Climate control lights for the passenger no long illuminate, when setting is on cold, cold air will blow on drivers side vents, but heat (that is hotter then the blazes of hell) blows from the passenger vents.
2005 Chevrolet Avalanche 1500130,000Visitor
Heat is not blowing. Have put in new blower motor, blower resistor and changed the 40 amp fuse which was blown
2004 Chevrolet Avalanche 150016,200Visitor
Driver's side emits cool air when heat is selected. Passenger side blows hot air.
2004 Chevrolet Avalanche 1500130,000Visitor
The problem that I have at times is the air condition is hot on the drivers side vents, but cold on the passenger side vents
2004 Chevrolet Avalanche 150058,000Visitor
Dual control zones. While a/c is running the drivers side will switch to blowing hot air.
2004 Chevrolet Avalanche 1500165,213Visitor
What do I do
2004 Chevrolet Avalanche 1500195,000Visitor
I will be driving and out of no where, I have hot air instead of my cold air on the driver side.
2005 Chevrolet Avalanche 1500225,000Visitor
Turn on A/C blows cold for a while. Then with a/c still on blows hot or warm in front while still cold on rear and passenger vents.
2005 Chevrolet Avalanche 1500140,000Visitor
air conditioner blows hot a air on drivers side and cold on passenger side. After a restart it worked properly. A day later I am back to square one. Hot on Dr. Side and cold on passenger. It's dual climate control....Any help is appreciated.
The air blending door " stepped motor" failure
2005 Chevrolet Avalanche 150060,000Visitor
at times I cannot control heat output. I change temp settings to no avail. puts out hot air no matter what
A/C blows hot through the drivers side and cold through the passengers side when the A/C is supposed to be blowing cold. I have found that pulling over and turning of the engine and re-starting will reset the issue. But I have this issue numerous time a month... This should be something Chevrolet should recall but they do not care about the customer. I have priced the actuators but really won't know which one, until I remove the driver side one and find out the part number. Make me want to drive a FORD!!!
2005 Chevrolet Avalanche 1500120,000Visitor
Cold air turns in to hot heat from vents while driving. Can stop and shut engine off and restart and cold air blows again
CHECK AIR BAG LIGHT CAME ON ABOUT A MONTH AGO AND HAS NOT GONE OFF
I can only get cool air whin I turn my heat all the way to hot, and turn the blower on. I know...
Please advise cost of installing owner provided Mode Actuator in dash unit of above Avalanche....
My a/c system switches to full heat while driving. It occurs on the drivers side only. Shutting...
The fuel pump may fail causing the engine to stall and not restart.