Philco Potential Flue Gas Spillage or Heat Exchanger Crack

Furnace shuts off and displays a carbon monoxide detector alarm in the home.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Blocked flue, Backdrafting due to negative house pressure, Cracked heat exchanger, Vent connector separation

How to Fix / Troubleshooting

Emergency safety warning: If a CO detector alarms, evacuate the home immediately and call emergency services. Do not reset the furnace and continue operation.

Immediate actions:

  • 1. Evacuate: Get everyone out of the building.
  • 2. Ventilate if safe: From outside, open doors and windows if possible.
  • 3. Do not use the furnace: Leave the furnace off until inspected.

Professional service required: A licensed HVAC technician must inspect the Philco furnace, flue, and heat exchanger and perform combustion testing. Replacement of the heat exchanger or furnace may be necessary.

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Repair Difficulty

Professional Required 5/5

Required Part

Heat Exchanger
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