Heater issues

Discussion in 'Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)' started by Welndmn, Nov 26, 2013.

  1. Welndmn

    Welndmn New Member

    i just picked up a 98 tahoe, the dash heater does is not providing heat, the rear heater works just fine.

    The pervious owner gave me some parts, a control unit on the dash and a bled door actuator, naturally I just slapped parts on, with no change.

    I put the actuator on the lower air box, the one above the transmission tunnel.
    Ive been reading here and this appears to be a common issue, where do start looking for the problem? I read there was another actuator on the top of the air box too.
  2. Pikey

    Pikey Moderator Staff Member 5+ Years ROTM Winner 5000 Posts

    is it blowing air? it is just cold? or is the fan not blowing air?
  3. Welndmn

    Welndmn New Member

    It is blowing air, just cold air when it's selected to the heat setting.
  4. RayVoy

    RayVoy Epic Member 5+ Years 5000 Posts

    If the temp doors are working, maybe there is no flow through the heater core. Find the two hoses, under the hood, that feed the front core. Are they both hot to touch?

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