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.
Average mileage: 139,788 (15,500–288,000)
18 model years affected: 1992
, more1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
139 people reported this problem
no heat from the front, but rear heat works great.
Actuator door quit working and would only blow hot air on driver side and cool air on passagner side when in ac mode.
2003 suburban z71 with duel climate control and rear controls no heat in front or rear sometimes rear will blow warm if reving rpms countinously. , blows cold air out of vents. When cycling the duel climate control levers up and down there is a change in air flow but not temp. Have flushed coolant system , replaced thermostat and flushed out heater core and water runs through freely. There is a clicking sound from under driver side dash coming from an actuator but all blower fan modes work. Just no temp control.
Drivers side a/c switches to heat, while passenger side blows cold.
Replaced drivers side door actuator, did not fix problem.
Turning the a/c off then shutting off car and restarting will reset all doors and actuators, fixing the problem temporairly.
had ac on and driver side started blowing extremely hot air
Heat coming out of drivers side and cool from left side
front a/c blows hot
rear a/c blows cold
Cooling only works on upper setting. The heater will only work when the car RPM are increased and will not heat the back vents at all. There is a continuing clicking sound coming from the dashboard.
The door controlling the air to the defrosters and the floor will not work. Heat comes out but will not go to the defrosters.
is stuck on heat or cold seems to change when it wants to but not by the control assembly.
Front ac/heat doesn't work, but rear works fine
A/C and heat not putting out right temperatures, actuator making sounds. Replaced acctuator
Occasionally hot air would start blowing on driver's side, but nowhere else. Stopping and restarting engine would fix it. This happened about twice to four times a month, until the alternator went out, and now it does it full time. This is the first day and after doing some research tonight I plan to disconnect the battery tomorrow to reset the door blend actuator and see what happens. But I haven't seen anyone else mention an alternator replacement being the trigger for this, and I want to educate myself before a mechanic potentially decides I need a new compressor.
Driver side Air cond turns to a high heat ---passenger side is fine --this is not a very good condition to have going across the Bonneville Salt Flats in 95 degree weather. I have had 10 suburbans and this one takes the cake -- I have had more problems with this one than all the others combine---the one that makes me most upset is the speedometer --with a $600.00 price take to repair plus removing the whole consul for a week or so. I wish the engineer that thought this one up had it stuff where the sun don't shine along with there fuel pump in the gas tank.
Heat don't blow out front vents
Heat is intermittent on drivers side. It will mostly blow cold on the drivers side while the passenger side and rear are working correctly. Sometimes you can hear the door open and it will blow hot air as it's supposed to do. No problems when AC is selected - only heat.
actuator reprogrammed and relaced left temp. valve.
AC on driver side blows hot, while passenger side and rear seat AC blow cold
Loud noise from blower, removed, dead mouse. fan control would only work on the 2 high positions, replaced the resistor control and got all 4 options working. problem the direction switch won't change it blows only on the wind shield no flow to the passenger positions,cleaned the ducts but still not working.