Auto Climate Control Issues - Blend Door? - 01 Sable LS
I have a '01 Sable LS Premium, and it seems that the auto climate control is having some "issues". As long as it's warm outside and just the A/C is used, everything works well. But as soon as the heat is needed for whatever reason, the heater will come on, but the blend door will not reset when cool air is once again required. All vent positions are working and the fan motor seems to be ok also. But when it's warm outside and I turn on the A/C (on any level), the car blows hot air.
I'm able to unhook the battery to fix this. I can also fix this by hooking up a higher-end OBD sensor and doing a full diagnostic. Since the blend door seems to work, I'm beginning to believe that this is a A/C control unit issue.
Anybody had this problem before? Any suggestions?