Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet Avalanche 1500

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.

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Average mileage: 123,161 (16,200–225,000)
4 model years affected: 2002, 2003, 2004, 2005
47 people reported this problem
30 people shared problem details
when air is on,suddenly it switches to full heat.If i stop and turn the engine off then restart the air works again.
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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?
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After battery removal air will only blow through defrost vents.
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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
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Dual zone air delivery - one side blows a/c cooled air and the other blows heated air in spite of temp control settings
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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
Heat is not blowing. Have put in new blower motor, blower resistor and changed the 40 amp fuse which was blown
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.
Driver's side emits cool air when heat is selected. Passenger side blows hot air.
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
i am losing antifreeze and i wonder why
I get no air at all heat or ac will not blow.
hot air only on drivers side
My air conditioner was blowing hot instead of cold in my 2004 chevy avalanche. It was blowing cold on the passenger side but not the drivers side. I replaced the blend door actuator on the passenger side and now the problem is fixed. These actuators are a common problem so if this does not fix your problem, you can take your truck to the chevy dealer and they will need to reprogram the actuators. They do this by computer software that was sent out to chevy dealerships.
Dual control zones. While a/c is running the drivers side will switch to blowing hot air.
I will be driving and out of no where, I have hot air instead of my cold air on the driver side.
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.
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
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