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Need Help! HVAC problems (no temp or vent control)

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Hey all. 
I bought another ride and it came with some HVAC issues . I’m not very good with wiring related trouble shooting so I need your help.

Its a 2002 suburban with the base hvac. No digital display and no dual climate.  

The issues 

*hot to cold switch doesn’t work

*vent change doesn’t work (blows out of front vents only)

[The Fan speed knob works fine And all fuses are good]


After reading up on the common actuator problems, I decided to try the relearn/calibration of the actuators. This literally did nothing and the part that has me stumped is that the actuators didn’t move at all during this calibration (you should hear them moving and calibrating)

So here is my thought on the problem. It’s either...

a) Both/ all actuators are bad and need replaced

b) The switch panel/ control unit is bad

c) There is something else and I’m lost. 

Please help guys! Is there something I don’t know??


Edited by zane richard
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Send me a PM and I’ll respond with you. I have a 04 Chevy Tahoe I bought new Jan 15, 2005 and have did all work on except warranty work and oil changes as I bought lifetime oil changes on it when I bought it. Currently have 128k miles and change oil every 3 months or 3k miles. Even if I were to change the engine I can still get the free oil changes as they only check the vin # on the door if the license plate changes otherwise they use the license plate number. 

  • Haha 1
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