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  1. #1

    Question heater not working!!

    my heater is maybe 5 months old yet it will not blow hot or even warm air and my vents don't work for some reason it will only blow the defrost and floor vents .
    Ol' Mossyback :great:

  2. #2


    i think i saw somebody post something similar to this under hvac controls. if i remember i think it had something to do with a resister on the blower

  3. #3


    ill check that out when i get off work thanks man

  4. #4
    Jr. Apprentice fairyandtroll's Avatar
    Join Date
    Dec 2009
    Atlanta, Georgia USA Area


    Check your coolant level in the radiator as well, my Sierra did the same thing and my indicator light never reported that it was almost out of water, I added coolant and had heat in a few minutes!
    The object is not to play the game, the object is to make it work!:glasses:

  5. #5


    thanks ill check that out after work

  6. #6


    what year/modle rig you got?

    doest sound like a resistor, more like hvac actuators sticking or needing reset. there are a few program updates for that kind of concern too

    05 silverado shortbed

  7. #7


    its a 93' sonoma 4.3 sle

  8. #8


    anybody got any suggestions ?

  9. #9


    woops thaught it was a much new'r rig

    sounds like a bad vacuum actuator or vacuum leak. unforunatily you need to pull the dash off

  10. #10


    dang man if i could just get it to blow out the vents

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