Dual Fuel Support: Robust internal diaphragms support both Nat and LP gas systems with field-installed conversion kits

Consult the high-altitude derate tables in the furnace service manual to confirm if a #33 size meets the required BTU compensation for your specific elevation

the limit switch is likely stuck open or tripping prematurely

Replacement is necessary if the boiler fails to ignite

this OEM kit is the standard for maintaining system reliability and preventing catastrophic dry-fire conditions in commercial boilers

Lennox 11W97 Service Valve R-410A Dual Fuel Support: Robust internalThe Lennox 11W97 Service Valve is a critical liquid line service valve designed for precision refrigerant management in residential and light commercial HVAC units. Engineered as a genuine Lennox OEM replacement part, this bar stock service valve features a front and back seating design, allowing technicians to isolate the system charge or access the refrigerant service port without total recovery of the system. This 3 8 inch valve ensures smooth flow