I would think that this part below would give you the idea of using the old wire to provide the signal or data it's is expecting, therefore negating the need for coding.

"Does your new lower temp thermostat still have an electrical connection? If it doesn't then there is how you can fix it by providing the circuit with whatever data it's expecting."

I honestly figured you'd understand what I said but no worries. You may want to sit this out in a neutral fashion, like WW2....


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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course