measure the resistance across the sensor leads with a multimeter and compare the ohms to the manufacturer's resistance-to-temperature chart

System Stability: Reduces unnecessary lockouts by providing consistent spark energy and reliable signal feedback

The Lennox 85C23 Low Pressure Switch is an essential safety component engineered for Lennox HVAC equipment

and various low-GWP blends

ensuring reliable system safety

Trane SWT4036 Door Switch 320074-702 measure the resistance across theThe Trane SWT4036 is a professional grade SPST 16A Door Switch engineered for high reliability circuit interruption in HVACR service panels, blower compartments, and electrical enclosures. This OEM Trane replacement part serves as a critical safety interlock, ensuring that power is cut to internal components when access panels are removed for maintenance or inspection. Rated for up to 16 amps at standard service voltages, the SWT4036 door switch