Hoval Mechanical Vibration / Mounting Fault

Boiler is very noisy, with vibration transmitted to pipework and building structure

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

Fan impeller imbalance, Loose mounting screws on fan or pump, Boiler not securely fixed to wall or frame, Air in system causing cavitation

Safety: Isolate power before tightening any fixings.

Check mounting: Ensure the Hoval boiler is firmly fixed to the wall or frame and that all mounting brackets are tight.
Tighten components: Check screws on the fan, pump, and casing panels. Tighten any that are loose.
Bleed system: Remove air from radiators and the boiler's automatic air vent to reduce cavitation noise.
If the fan still vibrates excessively, the impeller may be damaged and the fan assembly should be replaced.

Medium 3/5

Flue Fan Assembly

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