Furnace ignites but flame is yellow and lazy instead of blue.
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.
Possible Causes
How to Fix / Troubleshooting
Safety warning: Yellow flames can indicate carbon monoxide production. Install and check CO detectors in your home.
Homeowner checks:
- 1. Ensure combustion air openings are clear: Do not block louvers or grills on the furnace or in the furnace room.
- 2. Check for dust and debris: Visually inspect burners for heavy rust or debris.
When to call a professional: A technician must clean burners, check gas pressure, and inspect the heat exchanger on your Philco furnace. Do not continue to operate the furnace with yellow flames.
Repair Difficulty
Required Part
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