Kelvinator
Flue Gas Condensation in Vent
Water dripping from metal vent pipe on non-condensing Kelvinator furnace
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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
Oversized or uninsulated vent in cold space, Long horizontal vent run, Low flue gas temperature due to underfiring, Poor draft
How to Fix / Troubleshooting
Safety first: Turn OFF furnace if you suspect venting problems or see rusted-through vent sections. Carbon monoxide risk exists.
- Inspect venting: Check for rust holes, loose joints, or back-pitch in the metal vent. Replace any damaged sections.
- Check slope: Ensure the vent slopes upward at least 1/4 inch per foot toward the chimney or termination.
- Insulate cold sections: Where allowed by code, insulate vent sections running through unconditioned spaces to reduce condensation.
- Professional evaluation: A technician should verify proper draft, gas input, and vent sizing per Kelvinator installation instructions.
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Repair Difficulty
Hard
4/5
Required Part
Metal Flue Vent Pipe
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