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

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: 125,343 (1,000–251,000)
19 model years affected: 1995, 1996, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2015
209 people reported this problem
Viewing 1 - 20 of 104 comments
The vents facing the driver blow out hot air when the air conditioner is on. Sometimes it goes back to cold and there have been times when I have to pull over to restart the vehicle. I just turned the heat on, and now cold air comes out then heater is on. Is this a recall problem?
In AC mode, heat eventually comes out on drivers side. I had the actuator replaced by mechanic at a cost of $300.00 ($150 for the actuator and $150 for labor). New actuator worked fine for awhile now it's doing it again. Anyone have any suggestions or instructions on how to install new actuator?
2005 tahoe. have noticed rear a/c blowing hot if it is on at the same time or before front a/c. have to turn all a/c off, turn on front, then back and it usually works. sometimes have to restart the vehicle to get it to work. just replaced the battery and fusible link cable between battery and alternator, now the passenger side is blowing hot. since we're at the 39th day in a row of 100+ outside, i don't need the heater. i've read other blogs and it seems to be either a mode selector motor or actuator door issue, but i haven't seen anything definitive. can anyone help, please!
When the heat setting is on heat is only in the front the rear heat vents do not blow hot only cold even when the rear heat setting is on hot.
cant switch air to vents from def
Driver/passenger air vents blow hot then cold when using A/C. Back to cold when you restart the vehicle.
trying to get cold air thru the dash vents is a hit and miss deal. air will go thru the defrosters for the most part but in az. this takes a long time to get the inside cool. has electronic air front and rear .all air coming out is cold but just the wrong place
AC blows hot. Have to turn off engine and turn back on and this seems to fix until next time.
My front vents are blowing cold air but my heat is working in the back? Is it expensive to fix this problem
when air condition is on hot air blows on drivers side some of the time.. If I turn the vehicle off it will reset it. Same thing happens sometimes on passenger side.
Driver and passenger do not heat evenly. Have not fixed yet
At first, hot air would blow out of the passenger's side while the AC was on.

Next the AC would quit on the driver's side and blow extremely hot air (hotter than just the heat). I can get the AC back on only by shutting off the vehicle. The switch from AC to HOT seems to get worse starting about @ 85 degrees and when it's @ 100 degrees the AC stays on a very short while. When the AC is working, it is very cold.
The vents facing the driver blow out hot air when the air conditioner is on. Sometimes it goes back to cold and there have been times when I have to pull over to restart the vehicle
late August the AC would switch to heat for a few minuets and then resume with the AC,. as summer became fall I disregarded the problem till the 1st hard frost when after 5 miles little heat
Ac ran super cold for 2 hour drive. Stopped to get food. Furnace out the front vents. Tried turning ac on and off no fix. Restarted truck and working fine again. Hope it holds
The vents facing the driver blow out hot air when the air conditioner is on. Sometimes it goes back to cold and there have been times when I have to pull over to restart the vehicle. I just turned the heat on, and now cold air comes out then heater is on. Seems to be a problem with a module
Heating and A/C does not come on till 3 on the dial
Heat on drivers side while running ac not all the time. Now at 180,000. while running heat it blows cold air on drivers side it will not change.
after dealing with the on off hot cold issue for a couple of years it finally went all hot and no cold. I had the actuator replace parts and labor was right at $800.
Only cold air comes out of the driver's side vents, no matter what temperature is set it at in my 2005 Chevy tahoe