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Whether you are performing a propane conversion for Williams furnaces or a routine sea-level maintenance check
Bypassing a flame rollout switch is dangerous and violates safety codes
Manual Reset Security: The M/R functionality requires a technician to inspect the system before restarting
preventing hazardous conditions resulting from a cracked heat exchanger or blocked flue
and 1611 frames
Lennox 31J91 LP Pilot Orifice Whether you are performing aThe Lennox 31J91 LP Pilot Orifice is a precision engineered liquid propane (LP) conversion component designed specifically for residential and commercial gas heating systems. As a critical mechanical replacement for the legacy 31J9101, this red coded orifice ensures consistent gas flow regulation to the pilot burner assembly, maintaining a stable flame for reliable ignition cycles. Field tested for durability, the Lennox 31J91 is manufactured from