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this normally closed (NC) switch automatically opens the electrical circuit when the plenum temperature exceeds the 180°F safety threshold
and non-flammable gas applications where copper alloys are permissible
This OEM Williams P022800 replacement is manufactured from reinforced
professional contractors typically opt for silicone-filled variants to maintain needle response time
Broad Compatibility: Serves as a direct HVAC sequencer replacement for most major OEM furnace and heat pump brands
Honeywell Analytics E3M Sensor Cartridge Els PW 17895 this normally closed (NC) switchThe Honeywell Analytics E3M Sensor Cartridge (Order Number: 1309A0040) is a critical genuine OEM replacement for maintaining the E3 Point Gas Detection System. Professional installers recognize this CH4 gas sensor cartridge for its plug and play architecture, allowing for field replacement without the need for complex recalibration or system overhauls. Built with high grade catalytic combustion technology, it provides a detection range of 0 to 100%
