Brötje Unstable DHW control

Domestic hot water temperature fluctuates or is too hot/cold without error code

Advertisements

Safety Warning

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.

Advertisements

Possible Causes

Scaled plate heat exchanger, Faulty DHW NTC sensor, Sticking DHW flow switch or turbine, Incorrect DHW setpoint

How to Fix / Troubleshooting

Safety: Hot water can cause scalding. Turn off power and close cold water inlet before opening DHW components.

  • 1. Check DHW setpoint: On the Brötje control, verify the DHW temperature setting (typically 50–60°C).
  • 2. Clean or replace plate heat exchanger: A scaled plate heat exchanger reduces heat transfer and causes fluctuations. A technician should descale or replace it.
  • 3. Inspect DHW flow sensor: On combi models, check the DHW flow switch or turbine sensor for debris. Clean or replace if sticking.
  • 4. Verify DHW NTC: Test and replace the DHW temperature sensor if readings are unstable.
Advertisements

Repair Difficulty

Hard 4/5

Required Part

DHW Plate Heat Exchanger
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements