Poor AC performance Due to Evaporator Temperature Sensor Failure on Mercedes-Benz SL500

The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the air will be very cold at first, before warming up.

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Average mileage: 70,252 (39,000–110,000)
5 model years affected: 2000, 2003, 2004, 2005, more2006
11 people reported this problem
3 people shared problem details
"AC Off" light stays on. When pushed, it flashes and comes back on and stays. No cold air at all at any time.
A/C stopped blowing cold suddenly after turning car on. Blowers blow warm and hot
Starts cold then warms up
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