Chevrolet Tahoe Problem Report
Chevrolet Tahoe Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator
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.
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? - grandma217
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? - Visitor
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! - pgonzalez12345
cant switch air to vents from def - Visitor
Driver/passenger air vents blow hot then cold when using A/C. Back to cold when you restart the vehicle. - Visitor
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 - Visitor
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 - milkdude55
AC blows hot. Have to turn off engine and turn back on and this seems to fix until next time. - Visitor
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. - Visitor
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. - Visitor
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. - Visitor
Driver and passenger do not heat evenly. Have not fixed yet - Troy B
Heating and A/C does not come on till 3 on the dial - Visitor
The overhead ac/ heater doesn't work at all - Visitor
not fixed yet; just living with it so far; had the freon system flushed and refilled; issue with heat coming out when AC on still occurs. - Visitor
Drivers side vent delivers hot air when in AC mode. Passenger side vents blow cold air. This is frustrating as I have already paid to fix this once before. - Visitor
my heating temps reading at 78 is really cold I have to put my heater at 80 to get heat its to cold when its at 78 or 75 - Visitor
Driver air vents will blow extremely hot air, while passenger air remains normal. I have not repaired the problem. - Visitor
2nd time I need to replace actuators due to cold and hot air malfunctioning on either side of vehicle - Visitor
Was not fixed yet. They tell me the temp door switch is bad. Hot blows on driver side when set to cool and visa versa. - holter49
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more often thru the defrosters
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AC system picture showing low presure valve
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