Rust-colored water or corrosion visible inside furnace cabinet or on burners.
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: Corrosion can weaken the heat exchanger and lead to flue gas leaks. Turn off the furnace and have it inspected if corrosion is extensive.
- Check vent slope: Verify that horizontal vent runs slope back toward the furnace or drain as specified by Alpha, so condensate flows correctly.
- Inspect condensate lines: Repair or replace any leaking hoses or fittings.
Significant rust on burners or heat exchanger surfaces warrants a professional inspection and possible replacement.
Repair Difficulty
Required Part
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