I have recently had fitted trvs to the Eight rads in my bungalow and have what may appear to be a minor problem with one of the rads which was moved by simply extending the pipework around two walls, the prob is that it now clicks very loudly when warming up (not sure how long for as we turn it off after about half an hour.) As this rad is in our bedroom and the heating comes on at 6am the minor problem is becoming quite major would welcome any suggestions. System was commisioned by heating engineer and bled frequently since.
If you are reusing an existing radiator, it may be that the plastic inserts that go between the radiator and the mounting brackets have been discarded. If they have, this is most likely what is causing the clicking noise.
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