Trane used dc t-stat for a while with a sensor in line.It was designed to run off of the sensor in the event that the t-stat failed.If your model is like that get a dc-ac converter board and you can use any 24vac t-stat.Will take alot of problems away because the dc will pick up residual current if using unshielded wiring.
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Trane used dc t-stat for a while with a sensor in line.It was designed to run off of the sensor in the event that the t-stat failed.If your model is like that get a dc-ac converter board and you can use any 24vac t-stat.Will take alot of problems away because the dc will pick up residual current if using unshielded wiring.