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Hi John, it never used to do it when the UFH is on but has now started to do it but its less loud if the UFH is on if that makes sense? Boiler pressure is fine sits around 1.4 then goes to like 1.8 when heating is on

Hi John Iv got them all fully open to max setting. The issue I have is the moment I will go to turn any of them off the sound is already gone at that point. The sound literally occurs at the point of switching on the heating for like 5-10 seconds if that. Thats why i was thinking do i switch...

Hi I will try this tonight

Hi John Unfortunately the sound is still there. I will need to attempt the TRV but just need some advice on how to best approach as the sound goes by the time I will get to turning down the TRV…

Hi John Iv attached an image below. Do you mean turning this to 0.5? It was set to 0.3

Would have helped to put the images of the TRVs sorry

Hi DP/SGM, So iv put all the TRVs fully open to 5. All the upstairs bedroom radiators have a maximum of 5 with one of them a 6 (I’ve attached these pictures). I also have one of my bathroom radiators which have a maximum of 5. Iv then put the central heating on and as mentioned the noise...

Hi, The issue I have is the noise goes after like 10 seconds. I literally switch on the central heating and it then makes the drone sound for 10 seconds or so but literally vibrates the whole house. Am I better off switching off a TRV one room at a time and then seeing how the heating reacts...

Hello, Thank you so much for your reply. I have like 6 radiators upstairs and 5 bathroom radiators. Should I be switching them all off after I switch on the central heating? Including the bathroom rads?

https://vimeo.com/903012838?share=copy I’ve managed to upload a video too

Hi everybody, Firstly apologises if I have posted this wrong or in the wrong section. I have a vailiant system boiler, with underfloor heating for over 2 years. I have had ongoing issues since day 1 and have now been ignored by most plumbers as they get to a point where they don’t want to sort...