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verify the orifice size before completing the installation
High-Temperature Durability: Engineered to withstand the thermal cycling and chemical exposure typical of condensing furnace exhaust systems
maintaining the integrity of the vent safety shutoff system is non-negotiable for preventing flue gas spillage and potential carbon monoxide hazards
This design reduces internal thermal stress
This specific model is CCW (Counter-Clockwise)
Lennox 52M40 Pressure Switch Els PW 17895 verify the orifice size beforeAs a field tested Lennox 52M40 Pressure Switch, this genuine OEM component is a critical safety interface for residential and commercial gas furnaces. Engineered for precise pneumatic monitoring, this SPST furnace pressure switch features a single pole single throw configuration designed to verify inducer motor performance. The integrated 1 4" barb connection allows for a secure, airtight fit with standard pressure tubing, ensuring the system