OEM Lennox Flame Sensor with Lead — 27J02
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The genuine OEM Lennox 27J02 flame sensor with lead confirms the presence of a burner flame during ignition using flame rectification, signaling the control board that combustion is established. This proving function is essential for safe furnace operation, allowing the gas valve to stay open only when a flame is actually detected and shutting down the burners if it is not.
A dirty, corroded, or failing flame sensor is one of the most common causes of intermittent heating. Typical symptoms include the furnace igniting and then shutting off after a few seconds, repeated ignition attempts, short cycling, or a hard lockout after several failed tries. Because the sensor is exposed to constant flame, its coating degrades over time and the microamp signal weakens.
Installing the OEM Lennox 27J02 with its factory lead ensures the correct rod length, material, and connector fit for a strong, reliable flame signal. Generic sensors can produce weak or unstable readings that cause the same nuisance shutdowns you're trying to fix. The genuine part restores dependable ignition and safe operation. In stock and ships same day when ordered before 3PM CST.
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