Dimplex Mechanical Vibration / Mounting Issue

Boiler vibrates excessively or rattles when running

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Possible Causes

Loose Dimplex fan mounting screws, Loose Dimplex pump bracket, Boiler not securely fixed to wall, Resonance with adjacent pipework or casing panels

How to Fix / Troubleshooting

Safety first: Do not attempt to tighten components inside the sealed combustion chamber.

User checks:

  • Casing panels: Ensure the front and side panels of the Dimplex boiler are properly seated and screws are tight.
  • Pipe clips: Check that nearby pipework is clipped and not vibrating against walls or the boiler casing.

Professional actions:

  • Tighten internal Dimplex fan and pump mountings.
  • Add or adjust pipe supports to reduce resonance.
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Repair Difficulty

Easy 2/5

Required Part

Dimplex fan and pump mountings
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