American Standard
Vent Airflow / Resonance Problem
Furnace starts and stops with a loud whooshing or rumbling sound in the vent pipes.
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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
Improperly supported PVC vent piping, excessive vent length or elbows, shared vent with another appliance, loose vent termination on an American Standard furnace.
How to Fix / Troubleshooting
Safety: Turn off the furnace before adjusting venting.
- Inspect vent supports:
- Add hangers to reduce sagging and vibration.
- Check terminations:
- Ensure intake and exhaust terminations are secure and not obstructed.
- Have a technician verify vent sizing and layout against American Standard installation instructions.
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Repair Difficulty
Hard
4/5
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