Bosch EasyControl DHW Control Disabled or Misconfigured

Bosch EasyControl shows domestic hot water as off or unavailable, but the boiler is capable of DHW control.

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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.

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Possible Causes

System type set to combi when using cylinder, DHW function disabled in EasyControl, Boiler DHW control set to internal only, Missing DHW sensor or relay wiring

How to Fix / Troubleshooting

Safety first: Isolate power before working on boiler or cylinder wiring.

  • 1. Confirm system type: In installer settings, select the correct system type (e.g., system boiler with cylinder) so that DHW options appear.
  • 2. Enable DHW control: Turn on DHW scheduling/control in the EasyControl app and set appropriate temperature and times.
  • 3. Check boiler settings: Ensure the boiler is set to accept external DHW control if required.
  • 4. Verify sensor/relay: Confirm that the DHW temperature sensor and any cylinder relay are correctly wired and recognized by the boiler.

Professional help: If DHW remains unavailable, a heating engineer should verify the cylinder controls and boiler configuration.

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Repair Difficulty

Medium 3/5

Required Part

Bosch DHW / cylinder temperature sensor
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