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: 119,431 (3,000–257,000)
131 people reported this problem
86 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
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.
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.
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
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 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
2004 Chevrolet Silverado 1500150,000Visitor
ac & heat only blow out defroster
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.
2004 Chevrolet Silverado 1500123,000Visitor
heat wont come out on the floor on drivers side works on dash but not the floor
2003 Chevrolet Silverado 1500119,852Visitor
Hot air coming out of ducts all the time even with AC on. Started with just passenger side hot and drivers side was cool but now both sides are hot all the time.
2004 Chevrolet Silverado 150090,000Visitor
hot on driver side cool on pass.side
2005 Chevrolet Silverado 150080,000Visitor
With the AC on the system switches to heater and can not be turned off, the only solution is to stop and shut off truck then re-start
2003 Chevrolet Silverado 1500176,250Visitor
IT STARTED WITH AC BLOWING COLD ON PASS SIDE AND HOT ON DRIVERS SIDE. NOW IT BLOWS HOT NO MATTER WHAT I DO AND IT BLOW OUT
2004 Chevrolet Silverado 150045,000Visitor
hot air on drivers side with air on fixed it by taking cover off on passenger side cleaned dust dirt off now have 110000 miles no more problems
2013 Chevrolet Silverado 15003,000Visitor
heater won t shut oft A C don t work been back for same think over and over
The drivers side air will suddenly start blowing hot air. I can turn my truck off and restart it and the air will be cold again.
tow haul mode not working
Heat sometimes blows cold air
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