itermittent vibrating baxi solo he 15 boiler

it's having a 'sexual emergency'

get it a goat.

Or a camel.

I am assuming the poster is UK based.

Goats are relatively common.

So are camel toes. Downright common actually,

But a whole camel is a 'rara avis'.

Kettling? Grotty old pump, depends on the noise really. Brian

I was going to say its just written our next entry for Eurovision, but that would be cruel. Brian

the likely candidate for intermittent vibration is the fan. I'm sure someone else knows more about these boilers than I.

NT

Leaving the contents of your lady friends knickers aside, the OPs boiler apparently has a "desert button".

Well there you go.

The boiler has f***ed off to the sahara leaving only copulating camels., Stands to reeson dunnit?

If it is like a rattle, no. If it is a non-50-Hz hum, test whether it ceases when mechanical damping is provided, by touching one or more of the likely parts. If so, find and fit some other vibration-absorbing material.

I had good results (long ago) by slipping a piece of split foam tube (intended for thermal insulation) on a vibrating pipe. Possible alternatives ; bath sponge, old clothes, carpet, ...

There was a common problem with lots of Keston boilers where the thing would generate a vibration like a 32' organ pipe - it was an instability in the gas burning. The fault was incorrect mixture, and is fixed by setting up the mixture using a flue gas analyser.

Do you think a Homeowners Hubbite would understand that?