Lennox 87H90 Limit Switch Smith 100208085 Burner Gasket is

Smith 100208085 Burner Gasket is a critical high-temperature seal engineered for professional-grade HVACR combustion systems

The York S1-025-29083-002 is an automatic reset switch

Always verify the valve series on the nameplate before installation

Always verify your regulator model number before installation

utilizing the 74T11-310710 therm-o-disc style for consistent thermal response

Lennox 87H90 Limit Switch Smith 100208085 Burner Gasket isThe Lennox 87H90 Limit Switch is a critical OEM furnace replacement part engineered for precise thermal regulation within high performance heating systems. This primary limit control features a 1. 75 inch insertion length and operates on an automatic reset logic, making it essential for maintaining safe internal plenum temperatures. As a veteran technician knows, this SPST (Single Pole Single Throw) safety device is designed to open on rise at 190F