Fondital Heat Exchanger Kettling

Water heater emits a metallic banging or kettling noise when heating.

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

Limescale buildup in primary heat exchanger, Sludge in system water, Poor circulation flow rate

Safety: Allow the unit to cool before touching pipes or the heat exchanger.

System cleaning: Have the heating system flushed to remove sludge and debris.
Descale heat exchanger: A technician can chemically descale the primary heat exchanger using a pump and suitable descaler.
Check pump speed: Ensure the circulation pump is set to an appropriate speed and is functioning correctly.

Hard 4/5

Primary Heat Exchanger

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