Vehicle:
2003 C32 with C-AAC

Symptoms, 95% of the time the A/C functions correctly:
B1020 Evaporator temperature sensor code
AC continues to run for a few seconds after key is turned off.
AC blows hot air on low temp setting.
AC doesn't blow at all with fan set to max.

My thoughts:
Because the AC would stay on after the key turns off I'm guessing the Front SAM is intermitantly failing.

Has any one had issues like mine?

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1999 SL500
2003 C32
2002 S55
2004 S430
2003 E320
2004 E500