Quote:
Originally Posted by Matt L
Have you calibrated that thermometer? They come close, but never spot on.
You have a pressure switch in your low-side line? I think the older models may have had one, but our old '83 did not. The only pressure switch was in the high-side line.
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The temperature is well below freezing because you can start to see frost shooting out of the vents after a while. This car only has 2 pressure switches on the high side of the circuit. One that prevents the clutch from triggering if the system doesn't have a minimum amount of refrigerant pressure before switching ON, and another to turn off the compressor when the pressure in the system reaches a maximum pressure threshold. In this case the second switch is never triggered. I have to switch it off manually after about 1 minute because it gets too cold. 12oz of duracool does the job of 2lb of R134.