Control indicates 'Rollout Switch Open' or 'Flame Rollout'; burner is disabled until manual reset.

Critical safety warning: Flame rollout indicates combustion gases and flame may be escaping the burner area. Turn off power and gas immediately. Do not reset the rollout switch until the cause is identified.

• Inspect for soot and discoloration: Look around the burner compartment for soot deposits, melted wiring, or scorched paint. These are signs of serious combustion problems.
• Check venting system: Ensure the flue is intact, properly connected, and not blocked. Look for bird nests, debris, or collapsed sections.
• Do not operate the unit: Do not attempt to repeatedly reset the rollout switch. This can lead to fire or carbon monoxide hazards.
• Call a qualified technician: A professional must inspect the burner, heat exchanger, and venting, and verify safe operation before the unit is returned to service.