Mercedes: 1991 Mercedes Benz 190E 2.6 a/c, mercedes benz 190e, mb 190e

Question
I'm trying to charge the a/c with R12 for the 91 MB 190E 2.6. The compressor "clicks" & takes a little freon, but then shuts off. To get it to take any freon, the car would have to be started & shut off & restarted. I can see the bubbles move like the compressor wants to work. What could the problem be?

Answer
You must jump the pressure switch on the receiver dryer = this tricks the system into thinking there is a full charge = running.

The system will not function if the A/C Speed Sensor, Located at back of A/C compressor is bad.   


PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1991 Mercedes Benz 190E 2.6
Part: A/C Speed Sensor
 Note:  
Located at back of A/C compressor.     
R1073-37781 A/C Speed Sensor Behr IN STOCK $83.80  

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