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Lennox Furnace Flame Rollout Limit Switch 78L29
This part 78L29 is compatible with:
- Product Type:
- Furnace
- Brands:
- Lennox
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Flame Rollout Limit Switch Customer Reviews
Common Problems Fixed by the Flame Rollout Limit Switch
Based on customer reports and repair data, this part commonly fixes these issues:
About the Flame Rollout Limit Switch
The flame rollout switch monitors the heat surrounding the burners. If the inducer fan motor cannot draw enough air through the burners, or if the furnace is not venting properly, the rollout switch will open to halt the ignition sequence and prevent the furnace from heating. To determine if the flame rollout switch is defective, use a multimeter to test it for continuity.If the switch does not have continuity and the reset button is not tripped replace it. Be aware that poor airflow through the burner is often a result of insufficient ventilation or a restricted exhaust vent. Make sure that your furnace is in a properly ventilated location and the exhaust vent is clear of obstructions.
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