central heating is working ok but on hot water the boiler cuts out then lights , cuts out lights and so on, have changed thermister no differance, have cleaned secondry heat exchanger no differance, help !

dave, November 2007

I've got a Vokera Linea Max with a similar problem. The fault was intermittent. Go a plumber in who noticed that the fault occurred when you pressed on the control panel. The Main PCB is directly behind the control panel so fault was a suspected dry soldier joint on the PCB. Plumber fitted a new PCB for £128 and boiler is now working fine.

Andy, December 2007