Quote:
Originally Posted by jcyuhn
Apparently you are not aware how Mercedes climate systems operate. They do not use a pressure switch for clutch cycling. The pressure switch on the dryer is strictly a safety cutout for overpressure/underpressure. Clutch cycling is controlled by an evaporator temperature sensor - basically a thermistor mounted in the airflow immediately after the evap. I forget the setpoint to trigger compressor cutout, but it is well above freezing.
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Apparently you weren't reading.
Quote:
Originally Posted by tjts1
Using duracool (propane/butane mix) in our volvo, running the AC for 1 minute will yield 25f at the vents with 95f outside air temp. It gets uncomfortably cold so I turn it off for 5 minutes on recirculate. 1 minute ON, 5 minutes off is a good cycle. At that temp you can see frost shooting out of the vents.
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I was talking about my Volvo R134 system that has been converted to duracool which runs at 25f. My W201 also using duracool stays between 40-50f no matter what I do. The nice part about the W201 is that it will maintain this temperature no matter what the outside temp or speed. I spent 30 minutes in stop and go traffic yesterday at 100f outside temp with the vents blowing a cool 45f. Can't go wrong with that.