Oldsmobile/Buick Repair: Heater not working in passengers side, olds aurora, passanger side

Question
1999 Olds Aurora. Heater only works on the driver's side. I have checked fuses and they are fine. Setting temp at 90 deg, using the AC button on or off, the passenger's side blows cold air. Any suggestions as to what could be the cause? Thanks.

Answer
Hi
I would suspect the Passanger side temperature actuator.
You can, though, take it to a good repair shop, and have the HVAC system scanned for codes. This system SHOULD set a code.
You COULD try this trick... unhook BOTH battery terminals off the battery
Touch them together for 30 seconds to a minute.
Reattach the POSITIVE first, then the NEGATIVE.
Retest your system...If it still acts up, I would then recommend taking and see if any odes are stored.
I hope this ehlps
Pawl