heater not working!!

Discussion in 'General Chevy & GM Tech Questions' started by wilk, Feb 25, 2010.

  1. wilk

    wilk New Member

    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 .:confused:
  2. Randomsoleil

    Randomsoleil Member

    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. wilk

    wilk New Member

    ill check that out when i get off work thanks man
  4. fairyandtroll

    fairyandtroll New Member

    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!
  5. wilk

    wilk New Member

    thanks ill check that out after work
  6. Loggerhead Mike

    Loggerhead Mike Rockstar 100 Posts

    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
  7. wilk

    wilk New Member

    its a 93' sonoma 4.3 sle
  8. wilk

    wilk New Member

    anybody got any suggestions ?
  9. Loggerhead Mike

    Loggerhead Mike Rockstar 100 Posts

    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. wilk

    wilk New Member

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

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