Quote:
Originally Posted by Smith1
I'm having trouble with my A/C in my 1995 E300D. The unit is completely charged with 134a. I do not have any leaks in the system but the compressor turns on for about 5 seconds and then turns off. I can be traveling down the road an it will start working great then it will cut off again. The blower motor works fine inside the car. What could be causing the problem?
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Your system has a charge, but it is not fully charged would be the first thing I'd look for. The sight glass is useless with R134 without a manifold gauge set to measure the high and low side. The second thing to look for would be a malfunctioning cold control sensor located after the evaporator under the dash. You should also have a electronic temp thermometer and you can put the probe in your center vent where the air will be coldest and get your readings. My vent temp is 49*F after 10 minuts at full cold in Phoenix when it's 104*F outside! You can get a temp probe at Radio Shack.
