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Reply to "A/C thermostat dial is a switch, no difference in cooling output between barely on and cranked."

"Got to 32 degrees but I noticed no difference between the dial being barely on, just past the detent, to all the way clockwise."

John,

Is the compressor cycling at all?  I wonder if the tube coming out of  the knob/switch is correctly seated in the evaporator.  If it's not then the compressor will run continuously and the knob position will have no effect.

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