Atlantic Inconsistent DHW Temperature

Domestic hot water temperature fluctuates between hot and cold during a shower, with no error code.

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

Partially blocked DHW plate heat exchanger, Faulty DHW flow sensor, Inadequate cold water flow, Thermostatic mixing valve malfunction

Safety: Risk of scalding from sudden hot water surges.

Open tap fully: Run the hot tap or shower at full flow to stabilize temperature.
Clean shower head and filters: Remove limescale from shower heads and tap aerators to improve flow.
Avoid mixing at boiler: Set a moderate DHW temperature on the boiler and use thermostatic mixers at outlets.
Professional service: A technician should descale or replace the DHW plate heat exchanger and test the DHW flow sensor and mixing valve.

Medium 3/5

DHW Plate Heat Exchanger

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