OEM Lennox Flame Rollout Switch — 83L88
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The genuine OEM Lennox 83L88 flame rollout switch is a manual-reset safety control that protects your Lennox furnace from dangerous flame rollout. If burner flames escape the heat exchanger — typically due to a cracked exchanger, blocked flue, or poor combustion — this switch senses the abnormal heat and immediately cuts power to the gas valve, stopping the furnace before damage or a safety hazard can occur.
Common failure symptoms: A tripped or failed 83L88 results in a furnace that will not fire, repeated hard lockouts, or a system that requires manual reset to restart. Frequent tripping is often a warning sign of an underlying combustion or venting problem that should be inspected.
Why OEM matters: Flame rollout switches are life-safety components, and the 83L88 is built to Lennox's exact trip temperature and mounting specification. Installing the genuine OEM part ensures reliable protection, correct reset behavior, and full compatibility with your Lennox furnace — where a mismatched aftermarket switch could compromise safety.
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