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

The assembly includes a fused AC terminal block and a 3-conductor power cord

improper pilot flame impingement

As a veteran-grade SmartValve 24v Nat Fast Open 1/2" unit

Trane SWT4036 Door Switch 320074-702 The Lennox 85C23 Low PressureThe 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