My Vaillant Turbomax combi has started making an alarming (single) bang when any of the hot tap (kitchen/bathroom) are turned on or off.
It did this last year shortly before the pump packed up and we had a new one fitted. All was well until last month or so when noise has returned.
I *think* it firstly only did it when central heating was on AND hot taps turned on/off but now seems to do it even if c/h not on.
Pressure seems ok, about 1.5 bar at normal temp (boiler has mode where it keeps water at certain temp - forget the technical name)
Any ideas, as it sounds like its on its last legs?
Thanks in advance
It did this last year shortly before the pump packed up and we had a new one fitted. All was well until last month or so when noise has returned.
I *think* it firstly only did it when central heating was on AND hot taps turned on/off but now seems to do it even if c/h not on.
Pressure seems ok, about 1.5 bar at normal temp (boiler has mode where it keeps water at certain temp - forget the technical name)
Any ideas, as it sounds like its on its last legs?
Thanks in advance