Burkle

The stats are Snugstat wireless RF stats ( SnugStat RF Wireless Wi-Fi Thermostat - Snug Underfloor Heating (snugufh.co.uk)) and their datasheet is here SnugStat-RF-Wireless-Wi-Fi-Thermostat-Data-Sheet.pdf (snugufh.co.uk) The stats have all been replaced under warranty (1 of them has had 2 replacements, as the first received needed a firmware update, which couldn't be done at home), with the most recent replacements being in July 2024. I don't have specific model numbers to hand, but can look on the stats when i'm home. The heating has only really been up and running in here through December 2023, january-april 2024, and then will start to be used more frequently in coming months (hence why i am looking at everything again). All worked fine this morning on the 1 stat now i've put everything on a single zone (just kind of defeats the object of zones) so i will monitor this. It may be interference between the stats as you say. This is where i had thought previously of replaced these stats altogether and wiring in 2 Hive stats to match that of the radiator system (i know some people dont like Hive, or other systems, but i've never had a single issue with ours).

Not entirely sure and can't find any information. If connecting the stats to the app on your phone though you need to be using 2.4GHz signal, so it may be on that frequency. I have connected all actuator heads to a single stat tonight, reset thr power, and have the stat around 4 metres away... I will see how long it works OK!

The stats are not usually in the same room, one is normally in the larger room, and the other is normally in the utility which is just off this room. They are in the same room at the minute trialling whether it makes any difference to their operation. There is no apparent difference. The room itself is split into 3 separate areas too - a "snug" which is open sided to a dining area with a bay, and then then main kitchen which has a glazed gable end. The UFH coils allow for 3 zoned areas within this space (it is around 60m² in total, so not a small space, with the glass gable end likely to be cooler than the inner part of the room) - this is how it was designed/calculated by the UFH company. Rather than having 3 zones in here on 3 stats, they are all on 1 stat with the 3 actuator heads on the manifold wired to a single zone. Then the additional zone is the utility which is a separate room. Originally i had all 4 actuator zones on a single switch to operate the UFH during the works and prior to everything being installed properly. I maybe need to try everything again on a single stat to see if i have any issues with the loss of function this way.... that would confirm whether the 2 stat signals might be the issue. Although if one stat is turned off, then if the signal was the issue the boiler/system should fire up when heat is called for still for the other still - this isn't the case though from trial and error, it still requires that power is turned off altogether to the system for it to start working again. I will try putting everything on a single stat later to see if it makes any difference.

The wireless stats are mains powered, with no potential to use them as battery powered . I have tested them within a few metres of the wiring centre, and say around 10m+ away too. There is no apparent difference in their operation based on both. The stats are both currently within 1 metre of the wiring centre. They are currently within an open plan room, with no walls in the way, and any walls within the vicinity are generally single skin brickwork with new plasterboards and skim. There is no new equipment in the area. The WIFI router sits not too far away from the unit at present, but always has done.... and as suggested above, sometimes the system will all work fine for days, and then just wont work. Its not intermittent either in that some days it works and some days it doesn't, it is always a case that once it has stopped functioning it just wont work again until it is powered off and on. There could possibly be some disruption with the RF and the WIFI router in theory, but i would expect this would be intermittent?

Thanks again for the response, from past experience (and trying to figure this out) On the WB9-RF when the zone calls for heat (either from the schedule, or manual call or "boost") the relevant zone lights up fine. The "power" LED is always on (unless power it switched off at the fused spur) If any of the zones (we only utilise 2 zones on here) call for heat (when the system works) then the zone LED, along with the "boiler", "pump" and "valve" LED's all light up together to confirm everything is working. There is power running to all when required. The issue is more that it seems to be that the RF signal from the stats just stops communicating for no apparent reason and so there will be no heat. In this instance the only LED which will light up on the wiring centre is the "power" as this is always on to confirm power running to the unit. Its the call from the stat to tell the unit to power everything else up. The thing i cannot figure out with it is that it just stops works, there doesnt seem to be any pattern to this, and sometimes it will work for days, others it will be much shorter. The stats themselves are still "working" (e.g set the temp higher to see a flame on the screen suggesting a call for heat), and even if i turn the stat off, reset to factory settings (ensuring the receiver settings all match the wiring centre still) then it still doesnt trigger the zone on the WB9-RF. It will only start to work again (even if the stats are halfway through a heat schedule too) once the power to the WB9-RF has been turned off at the switch and back on (and it has to be for sufficient enough time to ensure power has been stopped - say 20-30 seconds).

Hi ProDave, thanks for the response - I dont have any new pictures to hand, but have posted a couple of files of which show previous photos i have. One shows the area of the manifold, the other shows the area of the boiler and the wiring box which links everything up. There are 2 2 port valves (one off the pipework under the boiler for the radiator system, the other to the left side of the manifold for the UFH connected to the wiring centre). As i say, when its working it works absolutely fine, i just cannot figure out why the UFH aspect stops working with the stats intermittently. whens its on and working it will fire up and turn off absolutely fine, its just when at some point its like it has a total loss of connection between the stats and the wiring centre, and the only way to resolve it is to cut the power to the wiring centre and turn it back on. Just to add too, it makes no difference if i turn off the stats (and even factory reset and reconfigure) to try and get them to function the controls through the wiring centre again.

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.