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having a problem with this boiler.. the fan sometimes pulsates on and off when it does work the temp goes to about 60 deg then falls down to 25deg. any ideas ??? i have checked the air pressure switch it seems to be working when a checked it with the muiltimeter, when its on it modulates no...

PROBLEM IS WHEN THE SELECTOR SWITCH IS AT THE OFF POSITION THE BOILER IS STILL ON THE ONLY WAY TO PUT THE BOILER OFF IS PUTTING THE SELECTOR SWITCH TO RESET. I HAVE CHECKED FOR THE END SWITCHES IN ZONE VALES THEY ARE FINE AND THE CYLINDER STAT IS FINE. THERE ISNT ANY ROOM STAT. ALSO THE...

radiators heating up stairs when running hot tap, also hot water temp scorching hot, checked flow rate and burner pressure all correct, has this boiler got a diverter vale or is it through the heat exchanger? maybe has pin hole. pressure not going up staying at 2bar. glow worm tech...

i am working on this combi boiler, problem is the boiler when on the heating is cutting on and off up to 5 times a minute. i have spoken 2 vokera not much help, any ideas the p.c.b-gasvale and modulater also the c.h thermstor have been changed still doing the same, the gas is modulating ok max...