Good Morning to all of you. I am new to this forum but have been driving MB's since i got my license! Problem i am having now is with a W124 230E 1991 Euro.
When you swith on the air conditioner, you can hear the "ssssssss" sound the refrigerand makes as it passes through the evaporator. This sound is continous and no cooling takes place, although the compressor is running with its clutc engaged.

Refrigerand levels is correct had it presurre cheched over the weekend.

could this be that the expansion valve is open the whole time and is not ****tioning correctly? Or could it be the compressor its self (I doubt since the car only has done 90K miles.

Second problem is with internal blower motor, it while only come on on the number 3 and 4 setting e.g. high speed. The lower speeds e.g. 1 and two does not work. Is this a problem with the resistance?? and where is it situated. Any help would be greatky appreciated. Thanking you in advance