hvac digital control

[JRRIVERA34]

2006

1.My ac controls won't remember that to keep airflow on upper vents unless I turn off the truck and leave the air on. Otherwise I have to adjust from feet vents to upper vents everytime that I turn on the air.

 

2. If I push the circulate button the orange light flashes and nothing happens.

 

3. If I turn the temp knobs up or down the degrees dont move consecutively, they are jumbled. 70,69,71,68,72 etc

 

Are these examples normal? I have no other silverado to compare to. 

 

tia

[swathdiver]

Probably time for a new HVAC controller.

[sefiroxx]

Pull codes. These codes won't set a SEL.