One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet Silverado 2500
Average mileage: 146,500 (82,000–260,000)
28 people reported this problem
11 people shared problem details
The problem is that the air only blos out the defrost and will not change over to any other outlets. I am having trouble finding the delivery door actuator for this, but have foound the temperature control one and it is working fine, so far. Any help on finding this thing would be appreciated
2004 Chevrolet Silverado 2500260,000Visitor
driver side will start blowing hot air when running AC. and will do just the opposite when running heat. passenger side works fine. you can shut off the truck and restart it and it temporarily corrects the problem.
2003 Chevrolet Silverado 2500109,000Visitor
Upon starting the truck, the mode door seems to cycle from floor to dash to defrost and stays at defrost regardless of switch position. Started IMMEDIATELY after replacing blower moron resistor. Have tried pulling the fuse for various lengths of time, turning off the ac when it gets to the dash position. All to no avail.
2003 Chevrolet Silverado 2500160,000Visitor
Not fixed yet. Blows hot air all the time.
2004 Chevrolet Silverado 2500193,000Visitor
My truck sit for better part of a year an several shops later. But now it's up an running the a/c blower barely blowd cold air. When it went down it worked fine. Any ideas?
all air conditioning and heating is directed thru the defrost vents only. I have not yet had it repaired
2004 Chevrolet Silverado 2500105,000Visitor
air temp varies regardless of slide position.
2003 Chevrolet Silverado 2500134,000Visitor
2003 Buick Rendezvous the heat /AC control panel meltEd from inside replace that and wires second panel only works on 5 wires are good and it did not melt what do you suggest
2004 Chevrolet Silverado 2500162,500Visitor
the problem is heating on ac mode because the actuator are't work
1999 Chevrolet Silverado 2500184,000Visitor
Heat will not switch from windshield to front
2004 Chevrolet Silverado 2500111,260Visitor
Inlet air actuator has failed. Cold air on feet all the time. $1000 + to repair. May trade it off for this price.
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