Hi i have got a saunier duval thermaclassic combination boiler and having returned from work found out i have no hot water or heating on inspection the one half of the front panel that display's the pressure and temp is blank and no green or red light is flashing. If switched off and back on you can hear a clicking noise coming from the right hand side but this stops. Could anyone be of help on this problem. The system was working fine when i went out at six this morning. Thanks Neil