OEM Compatibility: Designed for seamless integration with Lennox AF90 series furnaces

Operating a furnace with a bypassed York limit switch is a significant fire hazard and can lead to permanent heat exchanger failure

2B best suited for

How do I know if the main valve stem needs replacement

Williams 9307 Kit 323055-751 OEM Compatibility: Designed for seamlessThe Williams 9307 Thin Wall Collar Kit is an essential component for technicians installing Williams Direct Vent Wall Furnaces in structures with external wall thicknesses between 1 and 5 inches. This technical assembly adds 4 inches to the effective wall profile, ensuring the external vent cap achieves the required 1 1 4 inch engagement with the air inlet and flue tubes to maintain a sealed combustion system. Constructed from heavy duty galvanized