Chevrolet
Silverado 2500 HD
35

Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet Silverado 2500 HD

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 134,753 (73,000–237,188)
8 model years affected: 2001, 2002, 2003, 2004, more2005, 2006, 2007, 2008
35 people reported this problem
Comments
Viewing 1 - 16 of 16 comments
hot air comes out of drivers side and cold air from passenger side after 30 mins of air conditioner operation.
blowing cold air then after much trying with slide selecters a little heat then nothing.Will take to the shop soon.
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.
during the summer, all of a sudden heat will come out while AC is on. Turn the truck off and back on and sometimes this works.
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.
Blows heat out of driver side vents and drivers side center vent. Passenger side blows cold air for air conditioner setting.
When using the A/C, heat will begin coming out 1/2 of the vents. Sometimes it is the driver's side and sometimes it is the passenger's side. There is no rhyme or reason to when this will happen. This has been happening for many years.
Ac only blows out defrost vent same as hear unless I by pass it with some clamps lol but true
Cold air on passenger side of truck when the a/c is on and on the driver side it blows heat
heat/air sticks now its cold out heat dont work had it reflashed failing again
the ac only works best when the rpm is high turns off at low speepd
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
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