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  1. 02-23-2010, 11:41 AM #1
    slkric8
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    Default heater troubles

    intermittent problem - 2004 2500hd Silverado gas, heater blows cold air. Shift manual temp controls up and down a couple of times and warm air blows. What is the issue here?
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  2. 02-23-2010, 06:59 PM #2
    Uncle Ed
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    Default

    Probably the encoder motor on the hot/cold blend door is binding up. They aren't cheap.
    2002 Tahoe LS 4x4 • 5.3 Flex • Corvette Servo • AVS In-channels • JVC KD-PDR80 • BB Engine Tune • Front Mounted Receiver
    1984 3500 3+3 Crew Cab • 350 w/Edelbrock 600• 700R4 w/Corvette Servo & manual TCC • AVS Surface Mount • JVC w/Sub
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  3. 04-04-2010, 11:02 AM #3
    karz4life87
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    Default

    It is the Temp Door Actuater, it is prolly shorted out, and yes they are not cheap by any means i had mine short out on my 04 1500 and still have yet to get it taken care of. I have been quoted anywhere from $800-$1000 from various dealerships and local shops.

    If anyone could help me find out where exactly the actuater is on the driver side it would be great help.
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  4. 05-07-2010, 03:33 PM #4
    Loggerhead Mike
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    Default

    disconnect your battery to reset the hvac modules. sometimes the actuators will "loose" the door positions. if that doesnt help you most likely need a new blend door actuator.

    price will depend on where the actuator is at and weather you have to pull the dash to get to it or not
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