US Stove Excessive Vibration / Imbalanced Blower

Furnace vibrates excessively or rattles the ductwork during operation.

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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

Imbalanced blower wheel due to ash buildup, Loose mounting brackets, Misaligned venting causing resonance, Worn blower bearings

How to Fix / Troubleshooting

Safety first: Turn off and unplug the furnace before touching blowers or ductwork.

Steps:

  • 1. Inspect blower wheels: Remove access panels and visually inspect blower wheels for heavy ash or dust buildup on one side. Clean thoroughly.
  • 2. Tighten mounts: Check all blower mounting bolts, cabinet screws, and duct connections. Tighten any loose hardware.
  • 3. Check venting supports: Ensure the vent pipe is properly supported and not vibrating against walls or framing. Add supports or insulation where needed.
  • 4. Replace worn blowers: If vibration persists and the blower shaft has noticeable play, replace the affected blower assembly.
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Repair Difficulty

Medium 3/5

Required Part

Convection Blower Assembly
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