Please help.
For the past 12 months we've had a horrible 'clunking' then rumbling noise coming from somewhere within our central heating system. We have a 2 port valve above our combi boiler that seems to make a loud 'clunk', but the rumble seems to be coming from under floorboards whenever a TRV reaches temp and switches off, or the main room thermostat hits temperature. It has become unbearable over the past 2 weeks and is now waking everyone up in the house. I've managed to film the valve switching off so the 'clunk' noise can be heard (struggling to attach the file, will try and upload later), followed by the rumble but this is much quieter and less 'fierce' than usual. The rubble almost sounds like its coming from everywhere under the floor. The noise is at it's worst about 5:00 in the morning.
I should add there's another valve in our kitchen near the UFH pump and this also makes a quieter 'clunk' and rumble.
We've had 3 plumbers look at it so far but none have had any luck solving the problem.
Please, please, please help if possible
For the past 12 months we've had a horrible 'clunking' then rumbling noise coming from somewhere within our central heating system. We have a 2 port valve above our combi boiler that seems to make a loud 'clunk', but the rumble seems to be coming from under floorboards whenever a TRV reaches temp and switches off, or the main room thermostat hits temperature. It has become unbearable over the past 2 weeks and is now waking everyone up in the house. I've managed to film the valve switching off so the 'clunk' noise can be heard (struggling to attach the file, will try and upload later), followed by the rumble but this is much quieter and less 'fierce' than usual. The rubble almost sounds like its coming from everywhere under the floor. The noise is at it's worst about 5:00 in the morning.
I should add there's another valve in our kitchen near the UFH pump and this also makes a quieter 'clunk' and rumble.
We've had 3 plumbers look at it so far but none have had any luck solving the problem.
Please, please, please help if possible