Date registered: Oct 2007
Vehicle: 1998 c230 170K
Location: Exit 98, New Jersey, U.S.
Mentioned: 1 Post(s)
Quoted: 9 Post(s)
Yes, check the high side as well, the pressure on either side will vary with ambient temps. If there is zero on high side there is possibly is a restriction and freon loss.
You might be stuck bringing this in because of lack of codes to work with for diagnosis. Some of the other somewhat common replacement items are evap temp sensor (under the dash), low pressure switch(you already found), etc. it is possilbe to jumper them but do so at your own risk, would not advice doing.
To answer the question about voltage, voltage is not supplied to compressor when its in shutdown mode, the circuit is not complete.
To answer question about the clutch if compressor seizes, there is a high pressure switch on the compressor, if pressure backed up since the compressor stopped the switch would cut off and disingage the magnetic clutch so it probably would not destroy the belt. Please fill out your profile. thanks, B