Refer to the wiring diagram on the Lennox 10P17 housing

the York S1-025-26392-704 serves as a direct OEM replacement limit switch for several residential and commercial configurations

Key Benefits Universal Compatibility: Specifically designed for Robertshaw 7100 and 7200 series gas controls and compatible with Uniline series 700 units

Efficient Retrofitting: Allows for quick sensor replacement without draining the system or replacing the entire well

while the side ports are standard 1/4" SAE flare

Berko 4520-2048-000 Limit Switch Refer to the wiring diagramThe Berko 4520 2048 000 is an OEM 135F CO Auto Limit Switch designed for high performance thermal regulation in Marley Engineered Products and QMark 900 Series B heating systems. This 2 pole limit switch operates with an automatic reset mechanism, functioning as a critical safety component that opens on temperature rise to prevent overheating. Engineered for HVACR technical specifications, it features a single pole single throw (SPST) switch action,