I recently did the AC evaporator job on my wife's '95 850 turbo. That was fun. Anyway, we've noticed that when the AC is on the passenger side is significantly warmer than the driver side. Fan still blows air, but air is not as cold. Recently we just used the heater for the first time, and the passenger side air was outside temperature, and driver side was toasting marshmallows. The car has the automatic climate control. Temperature differential is present whether the control is on auto or manual. I'm hoping something like the little sensor above the passenger grab handle. If so, how do I check that? Any thoughts would be greatly appreciated.