On 29/09/17 21:14, john coen wrote:
replying to IMM, john coen wrote:
have to be careful sending an unprogrammed live feed back through to other
stat, Stats are tempermental


Most stats are dry no-volt contact types (including electronic ones
which typically have an output relay which you can hear as it goes "click").

Heating systems quite often end up with control elements wired in
parallel, eg frost stats so it's not uncommon.