My 01 SSEi has the automatic HVAC temperature control system. In the last couple of weeks, I noticed that the A/C air temperature from the dash vents on the driver'* side is warmer than on the passenger side - more humid also. I have fiddled with the control ***** (turned off the system and restarted, turned off the passenger control ****, changed temperatures), checked fuses, etc., but to no avail. I got it to blow cold one time briefly, then it warmed up again. The driver side is blowing warmer air, whereas the passenger side is blowing cold air. The air duct to the rear passenger seats is at a temperature between the front 2. I also notice that the defrost doesn't seem to be working as well as it used to - windshield on the driver side is starting to fog more. It doesn't seem like it is low on refrigerant however.
Could one of the temperature sensors in the dash be going out ? Would an error show up in if scanned with a tool?
Any other ideas what to check before going to the dealer ? ($$) The car is not under warranty anymore.