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 HD
Average mileage: 134,180 (73,000–237,188)
25 people reported this problem
12 people shared problem details
2004 Chevrolet Silverado 2500 HD85,000Visitor
blowing cold air then after much trying with slide selecters a little heat then nothing.Will take to the shop soon.
hot air comes out of drivers side and cold air from passenger side after 30 mins of air conditioner operation.
2007 Chevrolet Silverado 2500 HD123,000Visitor
heat/air sticks now its cold out heat dont work had it reflashed failing again
2008 Chevrolet Silverado 2500 HD75,000Visitor
Heat and ac failed to come out of drivers side vents. removed fuse for 1 hour then replaced worked fine for several weeks then reoccured.
2008 Chevrolet Silverado 2500 HD73,000Visitor
Blows heat out of driver side vents and drivers side center vent. Passenger side blows cold air for air conditioner setting.
2003 Chevrolet Silverado 2500 HD125,000Visitor
The right side a/c & heat control, when in full cool position, results in a clicking that seems to be something cycling in the control of the right side distribution system. By moving the right temperature control upward a short amount the clicking stops. Have not experienced that on the left side control lever.
2006 Chevrolet Silverado 2500 HD85,000Visitor
the ac only works best when the rpm is high turns off at low speepd
2005 Chevrolet Silverado 2500 HD215,000Visitor
REPLACED NOISY A/C COMP REPLACED ACCUMILATOR AND ORRIFICE,TRIED CHARGING A/C FREON STOPPRD DISPENCING WHEN HIGH PSI REACHED 150 IT WOULD NOT TAKE ANY MORE FREON
heating truns om when ac is trun on
2004 Chevrolet Silverado 2500 HD237,188Visitor
Heat or AC would not come out of their respective outlets,so I knew it was the blend door actuator.Ordered one and replaced the actuator all is good.
Yes, sometimes you turn the ac on and the heater comes on for a while then it will take 5 min or so and it will finally switch to cool air.
some time it wont go into coling it heat,s instead hasent ben fixed
I tried to turn on my ac but it blows hot air like the heater is stuck on the ac lines under the hood are cold like the ac is working just not getting through
have dual air,hot on one side and cold on the other
replaced control panel and it is doing the same thing. I have owned many chevy's and this truck...
you can feel both hot and cold air, but does not blow out of vents no matter what speed is cho...
defrost dose not work all others work