OEM Lennox Gas Valve — 73W17
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The genuine OEM Lennox 73W17 gas valve regulates the flow of fuel to your furnace burners, opening and closing on command from the control board to deliver safe, precisely metered ignition and firing. It integrates the safety shutoff, pressure regulation, and modulation functions your Lennox furnace depends on for clean, efficient combustion cycle after cycle.
Common failure symptoms include no ignition or no heat, burners that fail to light despite a call for heat, a furnace that locks out on ignition failure, delayed or rough ignition, or an audible click from the valve without gas flow. Erratic flame and unexpected shutdowns can also point to a failing gas valve.
Why OEM matters: the gas valve is a safety-critical component, and substitutes with different pressure regulation or wiring can create hazardous or unreliable operation. The factory 73W17 is engineered to your Lennox furnace's exact gas pressure, orifice, and control specifications — ensuring correct combustion, code-compliant safety, and protection of your warranty. Installation should always be performed by a qualified HVAC technician.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days