Lennox 78L29 Rollout Switch whether from the thermostat opening

whether from the thermostat opening or a momentary utility brownout

For technicians looking for a precise ICP 111001922 heater relay match

When troubleshooting irregular flame patterns or ignition lockouts

Durable Construction: High-grade metal construction resists the thermal stress and corrosion typically found in the combustion chamber environment

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Lennox 78L29 Rollout Switch whether from the thermostat openingThe Lennox 78L29 Rollout Switch is a critical safety component designed for high limit thermal protection in gas fired furnaces. This manual reset flame rollout switch is engineered to open the electrical circuit if it detects excessive heat or flame rollout conditions in the burner vestibule, preventing potential fire hazards. Rated for an actuation temperature of 250 degrees F, this SPST (Single Pole Single Throw) snap action switch ensures precise