Lennox 41K37 Gas Valve

The Lennox 41K37 Gas Valve, manufactured by Honeywell as model VR8204H8019, is a high-performance intermittent pilot gas valve engineered for single-stage heating systems. This 1/2" IP gas valve features a slow-opening characteristic to facilitate smooth ignition across various nitrogen-oxide (NOx) and standard burner configurations. Designed as a direct OEM replacement for 41K3701, this unit manages a maximum capacity of 150,000 BTU/hr at a 1" pressure drop, making it a reliable solution for residential and light commercial furnaces. The integrated regulator is factory-set at 3.5" W.C. for natural gas applications but remains field-adjustable from 3.0" to 5.0" W.C. to meet specific manifold pressure requirements. Operating on standard 24V HVAC controls, it utilizes 1/4" quick-connect terminals for electrical termination and includes a 1/8" NPT pressure tap with a plug for easy manometer connection during commissioning.

• Precise Pressure Regulation: High-accuracy internal regulator ensures consistent manifold pressure for peak combustion efficiency.
• Rugged Reliability: Durable construction designed to withstand temperature ranges from 0°F to 175°F in demanding mechanical rooms.
• Universal Compatibility: Replaces legacy Lennox and Allied Air part numbers including 93J51, 58K73, 25J32, and 41K3701.
• Safety Compliance: Features an IP rating for ingress protection and meets strict industry standards for HVAC gas flow control.
• Installation Efficiency: Compact 1/2" x 1/2" NPT footprint allows for straightforward fitting in tight furnace vestibules.

• Can I convert this for use with Liquid Propane (LP)? Yes, while factory-configured for natural gas, this valve can be converted using a compatible Honeywell LP conversion kit (sold separately).
• What does a "Slow Opening" valve mean for my system? It provides a delayed full-flow response, which prevents "booming" during ignition and promotes stable flame establishment on the burner assembly.
• How do I verify if the valve has failed? Check for 24VAC at the coil terminals during the ignition sequence; if voltage is present but the solenoid does not click or release gas, the internal coil or mechanical seat has likely failed.

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.