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: 121,757 (16,200–215,000)
49 people reported this problem
32 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?
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
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
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.
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
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
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.
The air blending door " stepped motor" failure
Selector for change of air not working. blower motor works fine, temperature works fine. can not change direction from defrost though.
2003 Chevrolet Avalanche 1500200,000Visitor
No heat cold air only.....
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.
2004 Chevrolet Avalanche 1500125,000Visitor
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.
2004 Chevrolet Avalanche 1500165,000Visitor
A/C was blowing hot on pass.side and cold at driver's side..took it to my mechanic and he told me i was having problems with my actuators..He could of done the work with after market parts, but he recommended the dealer..I had the pass.side acting up but decided to change both due that they still have to take down the whole dashboard..end up paying 1000 plus...
2006 Chevrolet Avalanche 1500118,000Visitor
When It began with the direction of air shifting intermittent from floor flow to mid flow to defroster over and over. it continued for a couple months. On and off airflow still works. Could not adjust the heater controls or stop the Shifting of flow. Now it just blows at the defroster level and controls for shifting flow direction will not respond.
I get no air at all heat or ac will not blow.
hot air only on drivers side
2004 Chevrolet Avalanche 1500180,000Visitor
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.
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.