OEM Lennox Flame Sensor Lead — 88A12
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The genuine OEM Lennox 88A12 flame sensor lead is the high-temperature wire that carries the flame-rectification signal from the sensor rod back to your Lennox furnace control board. This tiny current tells the board that a flame is present, allowing the gas valve to stay open safely during a heating cycle.
A damaged or degraded 88A12 lead can cause intermittent flame loss, furnace lockouts after a few seconds of burner operation, short-cycling, and repeated no-heat calls. Because the signal is measured in microamps, even a frayed conductor, cracked insulation, or loose terminal can interrupt detection and shut the furnace down as a safety measure.
OEM matters here because the 88A12 uses the correct high-temperature insulation, gauge, and terminal fit for Lennox equipment. Generic wire can melt near the burner, create a poor connection, or introduce resistance that weakens the flame signal. This factory replacement lead ensures clean, reliable flame detection and safe furnace operation.
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