Weil McLain 511-624-402 Pressure Switch Els PW 17895 a fouled or degraded flame

a fouled or degraded flame sensor is the primary cause of intermittent ignition failure and short-cycling

and upper spring seat

Common Questions What units are compatible with the Lennox X0444

Common Questions What causes a T&P valve to drip or weep

Weil McLain 511-624-402 Pressure Switch Els PW 17895 a fouled or degraded flameThe Weil McLain 511 624 402 Pressure Switch is an essential safety component specifically engineered for induced draft combustion systems. Calibrated to a 1. 48" WC setpoint, this SPST (Single Pole Single Throw) switch monitors the differential pressure across the inducer motor to ensure the venting system is clear of obstructions before ignition. This HVAC pressure switch features a dual 1 4" barb connection for easy integration with standard