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Author Topic: Westinghouse WD 12 Thermostat  (Read 370 times)
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Marines27
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« on: November 22, 2017, 02:13:27 PM »

I need to replace the type M thermostat on my 1952-ish WD12. I have a new stand alone thermostat, but need to know which terminal studs the two wires from the thermostat should attach to. The  Westinghouse manual shows the original goes to the #1 (red) and #3 (black) terminal studs.  Also, do I need to remove the non-functioning, original thermostat (stuck closed; compressor would not shut off)? Thanks
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WDG
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« Reply #1 on: February 11, 2018, 08:29:14 PM »

I'm sort of guessing, but if you have four terminals, the best way to check it out is to get a continuity meter and see which terminals open and close when you turn the knob.  You don't HAVE to remove the old one, but why leave it there?  I would remove it, myself.
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