OEM Lennox Furnace Pressure Switch — 60L03
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The genuine OEM Lennox 60L03 pressure switch is a safety control that confirms the draft inducer is producing adequate airflow before the furnace allows the gas valve to open and the burners to ignite. By sensing negative pressure in the venting system, it prevents ignition when the flue is blocked or the inducer is weak, protecting your home from unsafe combustion conditions.
Common failure symptoms include a furnace that runs the inducer but never lights, short cycling, repeated ignition lockouts, or a control board reporting a pressure switch fault. A stuck-open switch, a cracked hose port, or contamination in the sensing tube will keep the burners from firing even when draft is fine.
Using the OEM Lennox 60L03 is important because it is calibrated to the exact trip point (in inches of water column) your specific furnace requires. A mismatched switch can allow unsafe firing or cause persistent false lockouts. This factory-specified replacement restores proper safety verification and dependable ignition for your Lennox furnace.
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