I have cold air coming from the passanger side but hot air from the drivers side 2003 buick lesabre
You have a bad left temp door actuator. its on the lower left side of the heater box held on by 2 or 3 5.5 mm screws. It will most likely need calibrated after replacement
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My car is a 2000 LeSabre with Auto Climate Controls. I had cold air from driver side and hot air from passenger side. The following helped me: How to Reset 2000 Buick LeSabre HVAC
1. Ignition Key "ON" (Engine not running)
2. Press the "Auto" button, while Ignition is on.
3. Turn Ignition off.
4. Remove the "HVAC/Battery" Fuse (10 amp fuse #37 -- See Owner's Manual for drawing). The 2000 LeSabre has three HVAC fuses. Make sure you remove the "HVAC/Battery" fuse. If not sure which fuse, disconnect battery negative cable.
5. Wait 10 seconds or a little longer. Re-install the "HVAC/Battery" fuse #37 -- or reconnect battery cable.
6. Start the engine. The controls will default to 74 or 75 degrees F when the ignition is turned back on (If you see this, it is a good sign).
LEAVE A/C CONTROLS ALONE. Let the engine run for 2 minutes.
7. Turn the ignition off and wait 10 seconds but no more than 30 seconds -- count to 15.
8. Restart the engine. The system should work. It works for me. Heat is coming out from both sides.
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