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: 128,622 (16,200–222,000)
57 people reported this problem
2004 Chevrolet Avalanche 1500 108,000 mi, Visitor
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?
2004 Chevrolet Avalanche 1500 85,000 mi, Visitor
Dual zone air delivery - one side blows a/c cooled air and the other blows heated air in spite of temp control settings
2004 Chevrolet Avalanche 1500 119,000 mi, Visitor
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 1500 16,200 mi, Visitor
Driver's side emits cool air when heat is selected. Passenger side blows hot air.
2005 Chevrolet Avalanche 1500 130,000 mi, Visitor
Heat is not blowing. Have put in new blower motor, blower resistor and changed the 40 amp fuse which was blown
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
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
Selector for change of air not working. blower motor works fine, temperature works fine. can not change direction from defrost though.
I get no air at all heat or ac will not blow.
2004 Chevrolet Avalanche 1500 130,000 mi, Visitor
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
2003 Chevrolet Avalanche 1500 200,000 mi, Visitor
No heat cold air only.....
The air blending door " stepped motor" failure
2003 Chevrolet Avalanche 1500 160,000 mi, Visitor
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.
2004 Chevrolet Avalanche 1500 195,000 mi, Visitor
I will be driving and out of no where, I have hot air instead of my cold air on the driver side.
2004 Chevrolet Avalanche 1500 222,000 mi, Visitor
Heater blows cold air to drivers side and hot air to the passenger side when heat is on.
2005 Chevrolet Avalanche 1500 153,000 mi, Visitor
The heat is working. The vents will not blow. There is a clicking noise from under passenger side dash from a large black heating unit of some type.
2004 Chevrolet Avalanche 1500 147,576 mi, Visitor
No heat on the drivers side
Only receive heat when fan is in low blow clod as i increase the fan
2004 Chevrolet Avalanche 1500 125,000 mi, Visitor
AC blows very hot on driver side and cold on passengers side. Also heat blows cold on Driver side and warm on passenger's side.