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This design reduces internal thermal stress
maintaining the integrity of the vent safety shutoff system is non-negotiable for preventing flue gas spillage and potential carbon monoxide hazards
When the furnace control board initiates the ignition sequence
The low-profile design allows for flush or surface mounting on standard 4-inch octagonal or square electrical boxes
Lennox 52M40 Pressure Switch Els PW 17895 This design reduces internal thermalAs 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
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