Just replaced the noisy motorised valve on my heating as it finally failed. Now it’s dead quiet except the pressure gauge rattles, as the needle vibrates. Is there an easy fix, and is it a symptom of something else like lack of pressure in the expansion vessels..?

Well what’s the pressure gauge showing?

1 bar ish, I was told that’s what it was meant to be. The vibration isn’t a lot, maybe .1 bar, but it is just a bit noisy.

Got a vaillant boiler and the pressure gauge is nonsense – plumber said to ignore it as its so inaccurate. Tiny tube feeds I it and it gets blocked.