Lennox 34M74 Pressure Switch Els PW 17895 you can use a longer

you can use a longer lead as long as the excess copper tubing is carefully coiled away from the flame and high-heat zones

Repeated tripping typically indicates a low refrigerant charge

For technicians troubleshooting furnace short cycling or units that trip on high limit

Using it with NG would cause improper combustion and safety hazards

When the limit switch fails or detects an overheat

Lennox 34M74 Pressure Switch Els PW 17895 you can use a longerThe 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