Poor AC performance Due to Evaporator Temperature Sensor Failure on Mercedes-Benz E320

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 154,764 (84,000–250,000)
7 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002
23 people reported this problem
Viewing 1 - 6 of 6 comments
my a/c blows hot air after 5 mins of cold air. the compressor doesnt kick in. After doing diagnostics and found error codes leading to a bad evaporator temparature sensor
when turning a/c on it get cold and then a/c compressor go off then turn the car off and restart a/c come back on.
The AC would last only 5 minutes at the beginning of the day then there was no more cold air after. Heat wouldn't stay on either unless you kept it on defrost at which the fan would only run on high. It cost me $300 to fix at a Mercedes specialist shop.
On the way, the air condition went from cold to warm. The pump worked ok. I took to a shop; and the mechanic said the pump was weak, the evaporator was leak. It would cost me over $2,200 for repair.