Concord
Vent Airflow Noise
Furnace is very loud outside at the vent termination (high-efficiency models), with whistling or roaring noise.
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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 fitting, Obstruction at intake or exhaust, Undersized PVC vent pipe, Excessive vent length
How to Fix / Troubleshooting
Safety: Turn off furnace before inspecting outdoor terminations. Use caution on ladders or roofs.
Steps:
- Inspect terminations: Check intake and exhaust for obstructions (screens, debris, insects). Remove any non-approved screens or covers.
- Check fittings: Ensure termination fittings are installed per Concord installation instructions (e.g., concentric kit or two-pipe configuration).
- Snow/ice: In cold climates, clear snow or ice buildup around terminations.
Note: If vent sizing or length is incorrect, a professional may need to reconfigure the vent system.
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Repair Difficulty
Medium
3/5
Required Part
PVC Vent Termination Kit
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