Giant Combustion Fan / Burner Vibration

Water heater vibrates or rattles during burner or fan 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

Loose blower mounting bolts, Unbalanced blower wheel, Loose burner assembly, Resonance in vent piping

Safety first: Turn off power and gas before tightening any components.

Check blower mounting: On power‑vent Giant models, verify all blower mounting screws are tight and rubber isolators are intact.
Inspect burner: Ensure the burner tray is properly seated and secured.
Support venting: Add or adjust vent pipe supports to reduce vibration and resonance.
Replace blower wheel: If the blower wheel is damaged or unbalanced, replace the Giant blower assembly.

Medium 3/5

Giant Blower Assembly

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