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Hi John. thanks for the input. that explains a lot! I had checked online and did see that it required a pump over-run but the heating side of the system has been working (albeit poorly) and it had never over-run before. The pump had always shut off immediately when i turned the heating...

Ooooooo your good. Lol bloody 3 amp fuse in socket had gone as well. I've just done a system check and everything seems to be working as it should. All thermostats work correctly and all Hive controls seem ok. You my friend are a bloody superstar... thank you very much for your help...

No power at all. In either the boiler or the Hive receiver. I've just changed both fuses so they should be ok

These are the 4 wire that connect to the boiler block in wiring centre. The the green/yellow is in the earth of boiler block. I take it the red tape means this isn't actually an earth wire?

Sorry for the slow reply I'll remove the satisfied wire now. I have a worcester green star 24ri. A pretty basic condensing boiler. I've attached pics below the fuse that's blown is top left of the pic. There is just 1 cable that runs directly to the woring centre Thanks a lot

Hi Picasso. I've wired in the new cylinder stat. (See pic) black is call for heat, brown satisfied, blue common. When I turned the power on all seems ok nothing blows. But when I pressed the hive CH button all looked like it was working ok, the pump came on and the CH zone valve opened but...

Perfect. thanks a lot for your help. i can pick up a new cylinder stat tomorrow easily enough so should hopefully get it all wired up tomorrow night. although i will need to try and find a new fuse for wiring centre, typically after a quick google they dont look something screwfix or...

Hi Picasso, thanks for your reply. ive attached the wires as per the Hive dual channel wiring diagram (attached) or at least hope i have lol so the L/N & earth from the Hive are in the RH cable. Hive terminals 1&2 (HW off black/HGT off red) are in the LH cable and Hive terminals 3&4 (HW on...

Hi folks. ive been using/following this site for a while now while I renovate an old house I bought but this is my 1st post... first the history: I have a very old system that hasn't been updated for probably 30 years or so. I have swapped out all the old (rusted/leaking/broken beyond...