I have a problem with the central heating. The boiler is a conventional one (Glowworm Ultimate), not a combi boiler.
When the central heating comes on or off the pipes will give a single bang and vibrate a lot as the water starts to flow. The vibration is only a single movement that causes the banging noise and is not as the pipes expand. It also does it as the central heating goes off.
There was a fault on the three port valve a few months ago but a new one was fitted and it had been fine since.
My first thought was that it was the pump 'shuddering' as it stopped or started but that doesn't seem to be the case.
Any ideas?
When the central heating comes on or off the pipes will give a single bang and vibrate a lot as the water starts to flow. The vibration is only a single movement that causes the banging noise and is not as the pipes expand. It also does it as the central heating goes off.
There was a fault on the three port valve a few months ago but a new one was fitted and it had been fine since.
My first thought was that it was the pump 'shuddering' as it stopped or started but that doesn't seem to be the case.
Any ideas?