Recent content by FredBasset

So here's what's happened. It started making the noise 2 hours after it was serviced. I got him back to check the CO2 readings .. and since he did those checks, which were fine, it's stopped making the noise. Could it be he left something loose after the service? Either way it's fine again.

Thanks Chris_W, would a normal gas flow rate rule out the heat exchanger as the problem? Also, 2 hours after the service, is that a coincidence?

Also, it's literally only a couple of times a day, the rest of the day all is normal.

It was the annual service. I'm going to ask him back to retrace his steps, but could do with a few pointers. Heat exchanger is a good suggestion. Are they easy to unblock, or is it a new one?

Just had my boiler serviced, two hours after the engineer left, the boiler suddenly started making a very very loud humming/buzzing noise. The vibration went through the house and through me. It sounded like a truck was about to come in the patio doors. The experience lasted 2 minutes and then...

I was hoping so, as I have the exact same problem ...

OP Tony, did you ever get to the bottom of this - TRVs? toilet ball valve? Helicopter landing in the garden?