EWC Controls Forum

Zone one terminal block need to have the "O" "B" wired to the thermostat. You stat can not wire that way.

Thanks for your reply and this forum.

I now understand that the Sensi stat will not work with my current system.

Any comments on my questions in red above?

If I switched out the DuroZone ...

I downloaded the Sensi app and it told me my system was compatible based on the wires on my Master thermostat; when I check on the website wirepicker compatibility, it says my system is not compatible! It appears their algorithms are different and both assume I have a heat pump based on the O and B ...