Critical Furnace Shutdown After Heat Exchanger Failure

Cost Savings

Checklist Tasks

• Turn off the furnace at the thermostat, then disconnect power at the breaker.
• Close the furnace’s gas valve to stop leaks and prevent ignition.
• Place warning tags on furnace and thermostat to avoid accidental restart.
• Open windows near the furnace to ventilate and lower carbon monoxide risks.
• Test air with a carbon monoxide detector before re-entering the area.
• Photograph heat exchanger damage for insurance documentation.
• Look for soot, scorch marks, or foul odors to find additional issues.
• Inspect ductwork for heat or smoke damage that may compromise airflow.
• Remove combustibles within three feet of the furnace.
• Record furnace model, serial number, and last service date for technician reference.
• Contact a licensed HVAC technician, sharing photos and details for emergency service.
• Notify your home insurance provider of the shutdown with attached documentation.