Digital thermostat - permanent live needed?

[theflyingpig]

I only pulled a 3 core & earth cable to the location of digital room stat. I've come to wire it up and now realise the device will only work when programmer is sending a live to it.

Should have been 4 core & earth, right?

 

[RandomGrinch]

I only pulled a 3 core & earth cable to the location of digital room stat. I've come to wire it up and now realise the device will only work when programmer is sending a live to it.

That's the conventional way of wiring a thermostat: the stat receiving power, only when the programmer has activated the C/H.
What you do next depends on the new stat.
If the digital stat includes time scheduling, or is smart etc, simply set the programmer to constantly on.
Alternatively, change to a four core and earth cable, or use a stat that has battery power, or backup.

 

[Harry Bloomfield]

Alternatively, change to a four core cable, or use a stat that has battery power, or backup.

Or replace entirely, with a wireless system..

 

[theflyingpig]

Thanks both. It's an EPH Cp4m - time programmable -
I hadn't considered setting programmer to be always on! Thanks!