Lennox 34M74 Pressure Switch Els PW 17895 Repeated tripping typically indicates a

Repeated tripping typically indicates a low refrigerant charge

technicians can prevent premature bearing wear caused by improper housing clearance or excessive oscillation

When the limit switch fails or detects an overheat

For 3/4" tappings

Lennox 34M74 Pressure Switch Els PW 17895 Repeated tripping typically indicates aThe Lennox 34M74 Pressure Switch is a critical safety component engineered for precision monitoring of combustion air in residential and commercial HVAC systems. This OEM Lennox replacement part features a single pole, single throw (SPST) electrical configuration, meticulously calibrated to an actuation point of . 33" WC (inches water column). Designed with a standard 1 4" barb connection, it ensures a secure, leak proof interface with the inducer