Wolf Unstable DHW Temperature Control

Domestic hot water temperature fluctuates between hot and cold

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

Scaled plate heat exchanger, Faulty DHW NTC sensor, Inadequate minimum flow rate through boiler, Mixing valve malfunction

Safety: Risk of scalding from sudden temperature changes. Be cautious when using showers.

Check tap flow rate: Ensure hot taps are opened sufficiently; very low flow may cause cycling.
Avoid mixing at boiler: Set a stable DHW temperature on the Wolf controller and avoid extreme mixing at taps.
Clean tap aerators: Blocked aerators can reduce flow and cause instability.
Technician tasks: A heating engineer can test the DHW sensor, descale or replace the plate heat exchanger, and check any thermostatic mixing valves.

Medium 3/5

Plate Heat Exchanger

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