Trane THT0633 T-Stat Els PW 17895 the contacts are likely oxidized

the contacts are likely oxidized or the coil has an open winding

allowing for straightforward maintenance without pulling the entire assembly

Common Questions: What causes a flame sensor wire to fail

This specific model is calibrated for hydronic (hot water) systems

Forged brass construction with nickel plating offers superior corrosion resistance compared to standard valve bodies

Trane THT0633 T-Stat Els PW 17895 the contacts are likely oxidizedThe Trane THT0633 is a high limit snap disc thermostat engineered for precise thermal regulation within HVAC systems. This fixed temperature switch features an open on rise configuration, specifically calibrated to open at 140F and close at 110F. Designed as a direct OEM replacement for Trane and American Standard units, this bimetal disc limit ensures reliable performance in gas furnaces and air handlers by interrupting the safety circuit when