Pennco Mechanical Vibration / Pump or Fan Imbalance

Boiler cabinet or nearby piping vibrates excessively during operation

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.

Possible Causes

Worn circulator bearings, Imbalanced inducer fan wheel, Loose mounting hardware, Air in pump

Safety first: Turn off power before tightening hardware or touching moving parts.

Locate source: Place a hand lightly on different components (pump, inducer, piping) to find where vibration is strongest.
Tighten mounts: Secure loose pump brackets, pipe hangers, and inducer mounting screws.
Bleed pump: Some circulators have a bleed screw; carefully vent air with system off and cool.
Replace worn parts: If vibration persists, the circulator or inducer fan may need replacement.

Medium 3/5

Inducer Fan Assembly

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