De Dietrich Mechanical Vibration / Mounting Fault

Water heater vibrates excessively or rattles when the burner is on

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 mounting brackets on wall-hung De Dietrich unit, Loose fan or pump mounting screws, Unbalanced combustion fan, Resonance with flue

Safety first: Turn off power before tightening any internal components.

Step-by-step checks:

Check wall fixings: Ensure the unit is firmly attached to the wall and that all mounting brackets are tight.
Tighten covers: Verify that the front panel and any side covers are properly secured.
Inspect internal mounts: With power off, gently check that the fan and pump assemblies are firmly fixed.

When to call a professional: If vibration persists, the fan may be unbalanced and require replacement.

Medium 3/5

Combustion Fan Assembly

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