OEM Lennox Flame Rollout Switch — 56W63

The genuine OEM Lennox 56W63 flame rollout switch is a manual-reset safety limit that protects your furnace and home from flames escaping the combustion chamber. Mounted near the burner assembly, it senses excessive heat caused by flame rollout and immediately shuts off the gas valve if temperatures exceed its rated trip point. It is one of the most important safety controls in your Lennox furnace.

Common failure symptoms include a furnace that stops firing and will not restart, a tripped switch that requires manual reset, or a no-heat call after the switch has opened. A rollout switch that trips is usually signaling an underlying problem — a blocked heat exchanger, a dirty burner, a cracked heat exchanger, or a failing draft inducer — so the root cause should be inspected along with switch replacement.

OEM matters because this limit is calibrated to a specific temperature setpoint matched to your Lennox furnace. A generic switch with the wrong trip temperature can either allow a dangerous condition or cause repeated nuisance trips. The 56W63 is manufactured to Lennox factory specifications for correct calibration, proper terminals, and dependable safety protection.