Payne
Vent Termination Icing / Restricted Combustion Air
Outdoor PVC vent or intake on a high-efficiency Payne furnace frosts or ices up in cold weather.
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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
Improper vent termination location, inadequate vent slope, condensate freezing at termination, undersized vent pipe, wind effects
How to Fix / Troubleshooting
Safety first: Ice blockage can cause flue gas spillage and carbon monoxide hazards. Turn off the furnace if venting is blocked.
- Clear ice: Gently remove ice from the vent termination using warm (not boiling) water or by hand. Do not chip aggressively and damage the pipe.
- Check slope: Ensure vent pipes slope back toward the furnace to drain condensate and reduce freezing at the end.
- Inspect termination design: Verify the vent and intake terminations meet Payne installation guidelines for spacing and orientation.
- Consider vent modifications: A professional may need to relocate or modify the termination to reduce icing and wind effects.
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Repair Difficulty
Hard
4/5
Required Part
PVC Vent Termination Kit
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