12-09-2024, 05:44 PM
So……………
The Aquahot gets its signal from the W terminal on the tstat. The AC blower motor gets its signal from either GL or GH, usually black and green. The compressors get their signal from Yellow and Orange.
So it is entirely possible that the fan comes on and the compressors do not.
There are a couple of things you might do before swapping the tstats. After removing the tstat to look at the back, I would check to see if a previous owner jumpered the W Aquahot to the GL OR GH intentionally. I don’t think that is the case but who knows what may have been done.
The second thing is take the voltmeter and run the tstat through its paces. It should put out 12V at the terminals.
With heat on, check the GL and GH terminals for 12V. It should not be present.
The Aquahot gets its signal from the W terminal on the tstat. The AC blower motor gets its signal from either GL or GH, usually black and green. The compressors get their signal from Yellow and Orange.
So it is entirely possible that the fan comes on and the compressors do not.
There are a couple of things you might do before swapping the tstats. After removing the tstat to look at the back, I would check to see if a previous owner jumpered the W Aquahot to the GL OR GH intentionally. I don’t think that is the case but who knows what may have been done.
The second thing is take the voltmeter and run the tstat through its paces. It should put out 12V at the terminals.
With heat on, check the GL and GH terminals for 12V. It should not be present.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
)