FAQ & Troubleshooting

Controller in monitor/readonly mode (cannot set temperature, etc.)

Try changing the "Master Member ID", this is most likely the problem. If you don't know which identifier is valid for your boiler, you need to use brute force.

The boiler does not respond to setting the heating temperature.

Try on "Opentherm summer/winter mode", "Opentherm CH2 enabled", "Opentherm heating CH1 to CH2" checkboxes one by one and all together on the "setup" page. If this doesn't work, see above.

My boiler does not have a hot water heating function. How to turn it off?

Uncheck "Opentherm DHW present" on the "setup" page.

My boiler does not stop heating the heat carrier even if I turn off the heating.

Try on "Modulation sync with heating" checkbox on the "setup" page.

My DHW does not work when the heating is turned off.

Try off "Modulation sync with heating" checkbox on the "setup" page

How can I activate deactivated sensors and settings in my Home Assistant?

You need to open the device page, at the very bottom of the Configuration/Diagnostic card you will see the inscription “+N entities not shown”, click on it, a list of deactivated entities will appear. Select the one you want to activate and click on it. In the window that appears at the top there will be a gear icon (settings), click on it. In the window that appears, turn on the "Enabled" option and save. After some time, the activated entity will appear in the list.