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04 Z71 heater issues. AC sometimes blows hot, heater temp is lukewarm

Discussion in 'General Chevy & GM Tech Questions' started by yak, Nov 4, 2010.

  1. yak

    yak New Member

    My 04 Z71 with dual climate controls started acting odd this summer. One day it was blowing hot air when the AC was on and temp was set in the 60's. I just turned the system off, and next time I started it up it was functioning again.

    Lately I started noticing the heater was blowing cool to lukewarm air with both sides set to 72. If I set either side to 80's, it would blow warm air.

    I found a solution that worked for me (damned if I can find the post now) and thought I would repost it to offer an easy fix if you're having the same problem.

    [FONT=&quot]* key OFF
    * open the FUSE panel just inside the driver's door
    * remove the 10 AMP HVAC fuse (it should be GOOD, but check it anyway)
    * turn the KEY to the accessories (not start/run) position, leaving it that way for a minute or so
    * turn the key OFF
    * re-insert the 10 AMP HVAC fuse [/FONT]
    [FONT=&quot]Doing the above apparently allows the "actuators" to be reset.

    Jack
    [/FONT]
  2. curtisjon

    curtisjon New Member

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