Lennox 78L60 Gas Valve

When you are out on a service call for a Lennox unit that is failing to stage properly or has a cracked valve body, the Lennox 78L60 Gas Valve is the exact OEM replacement you need to get the system back within spec. This 3/4 x 3/4 2 Stage Step Open Natural Gas Valve is manufactured by Honeywell (model VR8305Q4153) and is engineered specifically for dual direct spark or hot surface ignition systems. With a capacity of up to 300,000 BTU/hr at a 1-inch pressure drop, it handles high-demand applications while maintaining precise manifold pressure. The step-opening characteristic ensures a smoother light-off, reducing ignition noise and stress on the heat exchanger. Built with a rugged aluminum alloy body and standard 1/4-inch quick-connect terminals, this 24V furnace gas valve operates reliably in ambient temperatures ranging from -40°F to 175°F. It is a drop-in replacement for older Lennox part numbers 28G26, 78L6001, and 28G2601, ensuring perfect alignment with existing 3/4-inch NPT piping.

• Genuine OEM Compatibility: Direct replacement for Lennox, Armstrong, and Ducane 2-stage heating systems to maintain original equipment certification.
• Precise Two-Stage Control: Features a factory-set dual pressure regulator (1.6 to 3.7 inches W.C.) for efficient low and high-fire operation.
• Optimized Ignition: The slow, step-open design prevents hard starts and improves combustion stability across the burner assembly.
• Industrial Durability: Designed for high-capacity throughput with a 3/4-inch NPT inlet and outlet for maximum gas flow efficiency.

• Can this valve be converted for LP applications? Yes, while set for natural gas, it can be converted using a specific Honeywell/Lennox LP conversion kit (sold separately).
• How do I verify if the solenoid coil is failing? Set your multimeter to ohms and check for continuity across the terminals; an "open" reading indicates a defective coil requiring valve replacement.
• What are the signs of a faulty 78L60 valve? Common symptoms include the furnace failing to enter high-fire mode, clicking without ignition, or inconsistent manifold pressure during staging.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.