And two years later you add to someone elses posting?
The Jaguar boiler is quite a nice little unit.
Pity your "plumber" does not understand them!
Tony
How about 3 years?! Am here as I've the same problem. Apart from the noise (I've tried Boiler silencer) the non functioning problem is that if water temp is set over 75 degrees - which the house needs in cold spells as no double glazing then it overheats and I have to press the red button inside on the left.
The boiler doesn't get used much by the way.
PS Am encouraged by your complimenting Jaguar but I've had silly problems with it - they even sent me a capacitor to put into the circuit board after a fuse kept going in early days. I had wanted a Worcester, would you compare them?