1. Welcome To GMTruckClub.com!

    The #1 Chevy Truck Forum Online
    Online since 2004, we are the #1 Chevy Truck & SUV forum and user community. If you have any questions about your Chevy or GMC Truck, SUV or Crossover, or just want to connect with other GM owners and enthusiasts around the world, you've found the best place on the internet to do that.

    Join Today ~ It's Free
    Registering is Free and Easy! Hope to see you on the forums soon!

HVAC controls not working '89

Discussion in 'Chevy C/K Truck Forum' started by mfklein24, Nov 5, 2008.

  1. mfklein24

    mfklein24 New Member

    Hi, i noticed on my 89 chevy pickup that my HVAC controls only half way work. the A/C button doesnt' do anything and neither does the defrost button. It doesn't even show it on the display and nothing comes out of the vents. I checked my fuses and they are all good. so is the control unit toast? or is there something else that could be wrong? i really need this fixed before i get caught with a frosted window! thanks
  2. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    Most likely the blower relays or the fan motor itself.
    Check out AutoZone's website for information on climate control parts.

    Here is a picture of the hi/lo relay:
    [​IMG]

Share This Page