Lennox 99K63 Flame Rollout Switch Manual Reset 250°F

The Lennox 99K63 is a flame rollout safety limit switch designed for Lennox furnaces. This critical safety component monitors heat levels surrounding the burners and actuates at 250°F (+/- 12°F) to protect the furnace from dangerous flame rollout conditions.

Key Features:

• Manual reset design requires physical reset after activation for enhanced safety
• Activates at 250°F (+/- 12°F) to detect excessive heat
• Closed face type construction with Red Dot certification
• Genuine OEM Lennox replacement part
• Prevents ignition sequence when improper venting or airflow is detected

This rollout switch halts the furnace ignition sequence when it detects heat buildup caused by insufficient airflow, blocked vents, or improper combustion. The manual reset feature ensures the underlying issue is addressed before the furnace can be restarted, providing an important layer of safety for your heating system.

OEM Cross-References: Replaces part numbers 48G07, 48G0701, 99K6301, and 65259400.