Re: Dual Zone Temp Control - Driver Side only blow Hot
That clicking noise is coming from a one of the blend door actuators under the dash. not too bad to change. while it's clicking, feel behind the dash in the area you hear it, to get an idea where it is. most likely your only problem. good luck with it ....
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If it's dual-zone climate control and the left side is cold, it's probably the temp-control (or it's wiring) itself. If that's not the case, you probably need the AC system refilled by a garage / specialist (can't do that yourself as it requires specialist equipment to replace the toxic gas).
if this has a dual zone,driver/pass control then either control or electic servo motor have failed,dealer only parts most of the time,gm tech 2 scanner can help with diagnostics,with key on engine off listen for motor noise as you cycle from hot to cold,if normal rotate without stripped gear noise then could bea stuck blend door.good luck
if it has dual zone climate setting it could be stuck in the cool setting. if it is not blowing any air it could be the duct came loose and it is blowing the air inside the dashboard. it will require you to pull the dash apart to inspect what the exact cause is. it could be anything from a bad temp setting switch in the climate control panel to a bad vac line that that switches the air from hot to cold. any other info you could give me may help such as if it is full electronic climate or manual knobs, dual zone, is it blowing any air or just no hot air.
Its more then likely the temp door broken or temp door motor broken/stuck. There is 2-3 of these motors under the dash on the side of the evap/heater core box. Some require extensive labor to replace, good luck
These problems are usually caused by a faulty blend door actuator which controls the position of the air mixing door, and in vehicles with more than one air zone (passenger/driver, front/rear, etc.) there will be a door/actuator for each. These electric blend door actuators are self-calibrating - there is a feedback circuit (wiper type potentiometer) that tells your HVAC control the position of the door. It is not unusual for this potentiometer to wear causing loss of signal at various positions, which then will cause erratic movements of the door (if the circuit fails to open circuit or shorting, the door will default to fully open or closed - i.e. hot or cold air only).
I would assume with multiple people having the same problems, there should be a service bulletin on this issue. may want to call dealer with vin # to verify. sounds like a heater control issue under the dash. something i would leave to the experts for repair