2006 Malibu LT 84k miles.
Just yesterday, the heater stopped providing heat. When the car is up to temperature, the radiator and heater hoses are hot, the temperature gage goes to it’s normal position, but no matter where the temp selector is set, the vents only blow cold.
If the car is parked, when already warm, the first few minutes of running will yield heat, but then it goes cold. I suspect this bit of heat is from the heater core and is seeping around the damper that controls whether the air flows across the heater core or not. I suspect it’s the damper, as there is no sound like a moving damper when moving the hot/cold knob, although I'm not sure it made noise before. Changing from vent to floor to defrost makes a whirring sound.
I’ve pulled most of the plastic pieces from around the heater area around the hump, but stopped short of pulling the actual dash apart, as I’m not sure where the motorized damper is located.
Can anyone provide any guidance as to where this motorized damper is located, how to determine if this is the issue, or am I barking up the wrong tree. Any help (especially a PDF copy of the shop service manual or th appropriate pages) would be appreciated. Unfortunately, I have not found a Clymer or Chiltons for this new a vehicle, only up through 2003, which was the last year before the model change and the Chevy OEM shop manuals are brutally expensive.
Thanks in advance,
Jack
