"RzB" wrote in
:


I'm actually suspicious of the Drayton Digistat 3 roomstat.

It has two connection wires. Is this just a normally open switch that
closes when it calls for heat?

It's a changeover switch, normally wired as a normally open.


Can I just connect these two wires
together to check out that this is the problem?

Yes, - of course you're aware they're at mains voltage.

The fixed wiring should be connected to terminals 1 and 3 on the backplate

mike