Hope someone can help me with this little problem. I have an Ideal Classic FF240 gas boiler, which feeds central heating and hot water.
There is a cold feed in the loft and a hot water tank. It has a Honeywell v4073A valve and Grundfos 15/50 Selectric 130 pump.
The whole system is about 8 years old from when the house was built.
Recently, I have started to get a banging noise from the boiler when it has been running for about 20 mins from cold.
It isn't really loud but is noticeable and something doesn't seem quite right. I think the term is kettling? Nothing has been changed or added to the system recently so not sure why it has suddenly started. It is not a constant bang, it does it every 20-30 seconds or so. Sometimes you hear running water through the feed pipes too.
The rads are fine - warm up nicely, and hot water is fine too. I have tried bleeding the rads but no trapped air.
I have tried turning down the thermostat on the boiler (currently at 4) and when I do the banging is certainly reduced but still there.
Finally, the pump is on setting "2". If I increase to "3" the banging does reduce and is quiter/less often.
Any ideas before I call a plumber in to take a look?
There is a cold feed in the loft and a hot water tank. It has a Honeywell v4073A valve and Grundfos 15/50 Selectric 130 pump.
The whole system is about 8 years old from when the house was built.
Recently, I have started to get a banging noise from the boiler when it has been running for about 20 mins from cold.
It isn't really loud but is noticeable and something doesn't seem quite right. I think the term is kettling? Nothing has been changed or added to the system recently so not sure why it has suddenly started. It is not a constant bang, it does it every 20-30 seconds or so. Sometimes you hear running water through the feed pipes too.
The rads are fine - warm up nicely, and hot water is fine too. I have tried bleeding the rads but no trapped air.
I have tried turning down the thermostat on the boiler (currently at 4) and when I do the banging is certainly reduced but still there.
Finally, the pump is on setting "2". If I increase to "3" the banging does reduce and is quiter/less often.
Any ideas before I call a plumber in to take a look?