Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

DHW :OFF on Vitodens 200

My Vitodens 200 boiler control panel display shows DHW: OFF (even though space heating is working fine and the control unit display shows that both DHW and Space Heating programs are selected). I cannot find any mention of this condition in any of the manuals.  Does anyone know what might cause this condition>

I should also mention that we had a power failure and this condition might have started after that event, but I cannot prove that for sure.


  • Paul Pollets
    Paul Pollets Member Posts: 3,642

    If it was working before, turn off the appliance for 1 minute, than turn back on which will reboot the computer. The DHW should come back on. Otherwise, it may be the sensor...do a scan check to see that all is well.
  • CMadatMe
    CMadatMe Member Posts: 3,086
    First Thing

    Is to check under coding #2 and make sure the system type is set correctly. When you lost power the boiler may have reverted its self back to 00:1 system type and is not recognizing the DHW sensor.
    "The bitter taste of a poor installation remains much longer than the sweet taste of the lowest price."
This discussion has been closed.