2003 Buick LeSabre Q&A
2003 Buick LeSabre Question: ac is warm on driver side, but cool on passenger side
AC is not very cool on driver side, but cool on passenger side. Dealer added freon previously and it improved, but is happening again. Why would this happen? - Visitor
If your car has driver/passenger temp settings then that's the problem. A "flap" that controls the amount of cool/warm air going to one side of the dash is not working properly. - Drujon
Had same problem, 2003 Buick Century, tried all the various efforts posted. Found that the Temperature controllers (potentiometers) can be easily broken when removing the knobs. Place sliders at mid range before attempting removal. The bodies are not soldered to the PCB. Some means of appling pressure to the body of the potentiometer helps. The actuators turn 90 degrees (1/4 turn ) the carpeted cardboard under the dash must be removed to view. They are located approximately behind the inner vents a flash light is handy for viewing. There is a slotted shaft about 5/16 diameter towards the outside, watch for movement when the controls are adjusted from max cold to hot. My scanner showed no codes. Measured temperatures where 18 degrees C passenger side and 23 degrees C driver side. My solutions was low freon after adding 8.7 oz temperatures are 7.5 degrees and 8 degrees with outside air at 83 degrees F. Good luck in your repair. gg - Visitor
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...
With AC on, I have warm air on driver side and cool air on passenger side.
Airconditioner blows cool air, but the cools air only blows out the vents on the passenger side. All the vents on the driver's side blows warm air. This is with the settings on "AC" or "Max AC"....