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Discussion Starter #1
2004.5 LLY
One day my truck decided it would not let me change the power/level of the air coming out. Sitting still no air comes out but when driving air will come through (very minimal). I can change the temp and zone but not the power.

I have replaced the Blower Motor and the Blower Motor Resistor and still no luck.

Thanks in advance.
 

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Did you check the fuses that protect the fan circuit? Did you check to see if you had B+ power to the fan motor? or the Resistor? Did you check to see if there is a good ground B-?
 

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Discussion Starter #3
Checked all the fuses. All good.
Decided to start back at the beginning before replacing the control unit.
It was the fan blower motor. I had just replaced it 4 months ago so it was still under warranty.
 
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