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Thanks for your response I have had a look at the other wiring end, and all it is a 2 core cable without an earth, looks like the earth on the old thermastat is linked elsewhere to another earth to provide this. The cable from the boiler is a 2 core white flex, which goes into a box spliter...

Think that makes safe So basiclly, the live from my boiler, which is a switched live, according the boiler manual will goto SL (ON) and the neutral will go just to neurtal, would this be correct? All I have have to do is find a feed for the permant Live in to feed the transmitter Would this...

it will be placed nere the boiler, Ive just the link, but its the same leaflet Ive got, which doesnt match my old wiring On the new one, there is a link wire located L In to L, does this need removing and does the SL (ON) need a connection?, as ive currently only got L,N,E on the old wiring...

Many thanks for your quick reply The Boilder is Alpha He33 The new thermal stat is a Horstmann HRFS1 Programmable Room Thermostat The old one is a metal type affair, with earth on the plate, L and N After reading the boiler manual, there is only a 2 wire output on there thermostat side

Hi everyone, My old room thermostat has been acting up a little, so its time to replace it, im usually quite good at doing the odd bit of electrical work, but not 100% of this one, so I thought id post my question here. On the old thermostat, which is a old metal type backing currently has a...