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The boiler i believe is about 7-8 years old. so i need the WB box / branded Drayton - (digistat) to get HTG on my boiler? And the wiring for the box is pre-wired / bridged inside the boiler and the box is like wireless? If i can't get this box, would a normal programmable room stat as...

Thanks mogget, agile and bengasman. I owe you all a pint or 3!! One last q - if i buy a programmable did room stat, i only need 2 wires from the boiler, ie a SL and SR to the stat. And no neutral (depending on the stat tho). I will check the boiler manual when i see it on tues anyway to...

Thanks for your help, I feel a lot more confident now and will understand what I'm doing!! :) Is the digistat like a normal stat but (obviously) with a digital display being the difference, and it is programmable?? I know you can get digi room stats that are not programmable and just...

Thanks for explaining I get it now!! Basically it is like a normal standard room stat, the COMMON terminal being the switched live, and the CALL terminal being the switched return!! :) and obv the N/R being the neutral if the stat requires a neutral (ie as an anticipator)!!... So I will...

Sorry, theis LS, LR is this the switch from the boiler to the stat??!! :? On a conventioanl boiler you have 1 wire from the boiler, with a neutal, earth and live (switched live) which is powered, along with the pump, when either the room/cyl stat call for heat, via a MV in the case of htg...

Oh yes i remember now, some worcester boilers have a digi stat (wireless) and the boiler has a built in receiver. I'll see if mine has a built in receiver on tuesday! WHen you say 2 switch wires, you mean call and sat ?? so to a programmer you would need to use CH on and CH off terminals??

Thanks for helping. Sorry but what is a WB clock?! If i choose a programmable wireless room stat where do i stick the receiver? just under the boiler? and what wires go to the receiver generally?

Hi mogget, thanks for replying There is a switched unit with a light indicator next to the boiler. This has to be on for the h/w to work. So I am guessing combi boilers need a permanent supply to them, unlike my old boiler in my old house which had a swicthed live, along with the grundfos...

Is a combi boiler hard to wire up or easier than a conevntional system such as a s plan or y plan?? I ask as i have moved into a new house, with a combination boiler, and the hot water is great, very hot. THe heating though when tested didn't seem to come on. There is an old programmer /...