[Richard]

Ok, it would still be good data to take your voltmeter and measure the outputs of GL, GH, and Y1 when the tstat is set to cool and the setpoint is below ambient.

To test your premise about incorrect wiring, let’s run another experiment. Make a short jumper wire, and jump Red to GL. The inside fan should come on. Does it? Then jump Red to GH, the inside fan should come on, at a slightly higher speed. Does it? Then jump Red to Y1, the outside fan and the compressor should come on? Does it?

If that works, then do this. Kill the breaker for the unit. Install temporary jumpers between GH and RED, and a temporary jumper between RED and Y!. This will simulate the Tstat telling the control board to run the unit. When the temp jumpers are installed, turn the breaker back on. Now you can measure the amperage and cooling temperature.

Caution, do not run the unit for more than 30 seconds with just Y1 jumped because the indoor fan will not be operating and the compressor will soon trip on high amperage.

I have internet connection today and Saturday, then I am back in the woods all next week.

I am ALWAYS hesitant to answer the question, what color wire did Newell use because no two Newells are alike. Newell may have changed their color scheme. A PO may have changed the wiring. My approach is more to use my voltmeter and figure out the color scheme. You will discover that just outside the basement unit that the standard multicolor tstat wire that you see at the tstat is spliced into a pigtail supplied by SCS. So it really doesn’t matter which color is used, what matters is the signal going to the control board.

The next step IF the jumper simulation doesn’t wake the basement unit up requires that you gain access to the control board in the basement unit.

This tstat will work for single stage AC and also run the Aquahot. https://www.amazon.com/Coleman-Airxcel-8...32&sr=8-12

And the wiring that I previously outlined. https://www.google.com/search?q=coleman+...0YhrtslKmM



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