Dimplex Bacterial Growth / Chemical Reaction in Tank

Hot water has a strong rotten egg or sulfur smell

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

Bacteria reacting with magnesium anode, Low water turnover, High sulfur content in water supply

Safety: Odor is unpleasant but typically not immediately dangerous.

Flush heater: Drain and flush the heater thoroughly to remove stagnant water.
Disinfect system: Follow Dimplex or local guidelines to disinfect the hot water system (e.g., temporary high-temperature cycle or chemical treatment).
Change anode type: If applicable, consult Dimplex about replacing a magnesium anode with an aluminum/zinc anode to reduce odor.

Medium 3/5

Tank Anode / Storage Tank (if fitted)

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