De Dietrich Overheating / Poor Ventilation or Insulation Fault

Boiler room or casing excessively hot to touch during 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

Blocked ventilation openings, missing or damaged insulation panels, high flue gas temperature, fan or flue fault

Safety: Overheating can damage components and pose a fire risk. Do not cover the boiler or block vents.

Check ventilation: Ensure any required ventilation grilles around the boiler are unobstructed.
Inspect casing: Remove the front panel and check that all internal insulation panels are present and correctly fitted.
Technician tasks: A heating engineer should check flue gas temperature, fan operation, and replace missing insulation or faulty components.

Medium 3/5

Internal Insulation Panels

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