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oh yes! many thanks

On some of my radiators / towel rails the trvs are whistling a very high pitched noise which is really irritating!!! If I move the setting it stops..presumably opens or closes the valve stoping the high pitch noise Is there anything I can do regarding this? Anything I can put in the water...

Hi...I too have the same boiler but it the only way of controlling it is by the TRVs or the level on the boiler...this sounds fantastic thankyou. I did not know it was illegal to fit without!

Sorry..never been on a forum before thanks for answering the question!! :lol:

Yes...it sounds like it would be short cycling, if I look at the in line strainer for debris how do I do this..do I have to empty the CH system? Thanks Guys :(

The Hot water is fine as this is heated on demand and have had no problems here

Very confused. my boiler heats for 10 seconds then cuts off for 2 minutes then heats for 10 seconds etc...Is this normal for the central heating ??? THere are no error messages but its surely working too hard??? There is an in line 22mm strainer on the return to the boiler...if this was...