When the boiler is cold, drawing hot water or using the CH causes the boiler to vibrate.
I have found the best way to temporary eliminate this noise is to cycle between DWH and CH. After doing this several times the noise stops.
The problem then starts all over again when the boiler is cold.
The vibration feels like its coming from the gas valve.
Prior to this noise I had removed and cleaned the burner. descaled the heat exchanger and replaced a holed diaphragm.
Has anyone come accross this problem before.
I have found the best way to temporary eliminate this noise is to cycle between DWH and CH. After doing this several times the noise stops.
The problem then starts all over again when the boiler is cold.
The vibration feels like its coming from the gas valve.
Prior to this noise I had removed and cleaned the burner. descaled the heat exchanger and replaced a holed diaphragm.
Has anyone come accross this problem before.