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 1500
Average mileage: 120,492 (17,900–257,000)
114 people reported this problem
76 people shared problem details
ac blows hot air on drivers side, have to pull over and restart the engine this sucks big time
Left drivers side vents blowing hot air when ac on..... passenger side blowing cool air
2004 Chevrolet Silverado 1500103,000Visitor
Heat on all the time, can not turn off
1999 Chevrolet Silverado 1500116,000Visitor
a/c and heat all comes out of defrost vent and cannot switch from hot to cold without shouting off engine for a little bit.
2000 Chevrolet Silverado 1500206,000Visitor
ac and heat doesnt work,fan worksin three of four speeds.
2005 Chevrolet Silverado 1500100,000Visitor
Drivers side AC will intermittently switch to heater. Only remedy once heat starts is to restart engine. Seems to happen after relative high speed and slow down, will kick off when acceleration resumes. Also seems to happen between 75-85 deg outside temp the most often. It has become major annoyance but expensive fix.
2004 Chevrolet Silverado 1500121,000Visitor
Ditto. Occasionally the driver side air will go from AC to heat! Have to stop the car and restart it to get it to be AC again. Time to sell and buy a Ford.
2002 Chevrolet Silverado 1500199,236Visitor
can not change air delivery from floor outlets
2004 Chevrolet Silverado 1500129,000Visitor
heat on the left side failed. replaced actuator, but unfortunately heater core failed at the same time so i had dto replace that too
2003 Chevrolet Silverado 150085,000Visitor
The passenger side air blows only hot air, because the acctuator door is broken. I took the vents out and sealed them so that no air comes out of the passenger side vents. This is obviously not the best solution, but the acctuator is so hard to get to that it isn't worth it to me.
2004 Chevrolet Silverado 1500150,000Visitor
ac & heat only blow out defroster
2004 Chevrolet Silverado 1500123,000Visitor
heat wont come out on the floor on drivers side works on dash but not the floor
When you drive down the road the AC on the drivers side starts blowing out hot air. You have to stop and restart the truck for it to blow cold air again. The passenger side continues to blow cold air and is not affected. It started doing in one time a day but is now doing it four or five times a day. It is currently in the shop. He has replaced two Actuators at $126 each, but he says the problem has not been fixed. I will update this post after I pick it up.
2005 Chevrolet Silverado 1500130,000Visitor
When starting up the A/c blows cold on the driver's side and "warm" on the passenger side. After driving 20-25 minutes the driver's side a/c vents blow warm-hot. Shutting off the truck and restarting it will get you another 20 minutes of a/c before it blows warm again. My shop does not think the compressor is bad, rather the problem is electrical...relays, etc.Says the hot air on passenger side all the time is a faulty actuator, but will have to pull the dash to repair. He's still working on the driver's side a/c fix.
2009 Chevrolet Silverado 150070,000Visitor
air condition blows hot from driver vents and cool from passenger vents
2013 Chevrolet Silverado 150017,900Visitor
The defrost only works on the driver side of my 2013 Chevrolet silverado. I took it to my dealer in Jesup GA and they said that they felt the air not blowing but said nothing was wrong. This is a hazard issue!
drivers side window will not roll down.air condition will not work.when first start up makes sound like somthing in fan.
2010 Chevrolet Silverado 150087,000Visitor
Drivers side blows hot air and passenger side blows cool air. I can't afford to fix this. Maybe I need to switch to ford.
2003 Chevrolet Silverado 150075,000Visitor
Ac outlet on drivers left side does not blow anything center outlet and both passenger outlets work fine. Takes forever to cool driver side with only one outlet working. At one time I took it to Chevy Dealer and he mentioned it being a relay problem. Havent been back they are too expensive to fix.
2004 Chevrolet Silverado 1500128,000Visitor
Drivers side blows hot. Passenger is cold. Ill stop kill eng ine. Start up again its cold.
tow haul mode not working
Heat sometimes blows cold air
Have dual controls. Everything working fine; then all of a sudden my driver's side will blow ou...
A/C is blowing hot. Have narrowed it down to temperature control. Compressor working. Lines are...