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Apologies if this is posted in the wrong section - there is a bit of a crossover between plumbing / UFH / boilers / radiators / electrical. We have a combi boiler, with radiators, which runs from a hive stat. We had underfloor heating installed to the ground floor (manifold, pump, valve etc all on the ground floor) which runs off the same boiler, which has its own wiring centre and stats on RF signal to said wiring centre - so both can run together or on their own, and when it works it is great. My issue, which hopefully somebody might be able to advise on, is that the UFH heating every so often stops working to the schedule... its as though the wiring centre doesn't receive the signal from the stats. At first i thought this might be the RF signal, but i have tried this with the stats within a couple of metres of the wiring centre, and get the same issue (the room is a big open plan space, around 10m long x 6m wide, with 2 stats and the wiring centre in the same room). Even if i reset the stats or use the boost feature on them, it doesn't fire up the boiler through the wiring centre. There is power to the wiring centre (light is on to confirm this too), and the boiler, pump and relevant zones can be fired up using the test switches in the wiring centre (this is why i thought it might be something to do with the RF signal). But, the only way i can find to get it working again properly is to turn off the power to everything (via the fused spur to the boiler and everything attached), and turn it back on then everything works fine again... well, for so long anyway. As an example, the boiler was power was turned off / on again on friday evening, and everything has worked ok on the schedule until this morning (Monday) when the UFH did not come on as scheduled. Sometimes this might be less than a day, sometimes over a week, before the UFH stops working through the stats again. The radiators still work fine connected to the hive direct to the boiler (there is also a zone valve on this which works no problem to allow the radiators and UFH to work individually). The system is snugstat, with the RF stats, and the WB9-RF wiring centre. I have spoken to the manufacturer about the issues, and have replaced the wiring centre once, and the stats have been replaced twice, but still have the issue. An electrician installed everything with the plumber, and a separate electrician has checked all the wiring and cant find any issues either. Does anybody have any thoughts on why this might be happening? and what i can do to solve the issue? I have been pondering over getting hive stats to connect up to the wiring centre as we have never had an issue with the hive for the radiators, but don't want to spend the money on this yet in case it is something to do with the wiring centre and the way this all works. Any help, advice or general thoughts and comments on the issue would be much appreciated.