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

jmardyMember

I finally have my A/C system rebuilt. Everything is new except the evaporator and expansion valve. Running R12.
Sanden SD510 compressor
4 row condenser
new hoses
new dryer
Pantera Electronics A/C controller

Went for a test drive with a digital thermometer in the vents. Got to 32 degrees but I noticed no difference between the dial being barely on, just past the detent, to all the way clockwise.
What does this control?
How can I troubleshoot it?

3/26/224:50 PM

Original Post

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