hi i have a worcester 28 si boiler and when you turn c h on

[bigbird23]

hi i have a worcester 28 si boiler and when you turn c h on the fan dose not work but when you turn it of the fan works i have check the power to the fan and when on power go up and then drops straight away and when you turn the boiler of the power go up and stays there till the fan has purg the boiler
thanks s.wilson



Optional Information:
Make : worcester
Model : 28si

Already Tried:
i have cleaned heat exchanger and burner check pump flame ignition work ok the fan dose not start when boiler is tuned on but will start when turned of

 

[Boilerman2]

Could you re-write the above in a format we can understand?

 

[bigbird23]

when you turn on ch the fan start but stop wright away the boiler will keep trying to start untill the reset light comes on when i turn the ch of the fan start and run ok till it purg the boiler i have check the electrics to the fan and when bolier is tunred on you get a good reading but it drops to 0 stright away and when turned off the fan starts and the power stays up

 

[bellairaphon]

is the hot water ok? are you gettin any voltage to the gas valve before then fan goes to full for the purge

 

[bigbird23]

is the hot water ok? are you gettin any voltage to the gas valve before then fan goes to full for the purge

no the hot water does the same as c h and yes iam getting voltage to the gas valve but you can see a spark on the control board when the fan tried to start

 

[bigbird23]

hi i have a worcester 28 si boiler and when you turn c h on the fan dose not work but when you turn it of the fan works i have check the power to the fan and when on power go up and then drops straight away and when you turn the boiler of the power go up and stays there
thanks s.wilson



Optional Information:
Make : worcester
Model : 28si

Already Tried:
i have cleaned heat exchanger and burner check pump flame ignition work ok the fan dose not start when boiler is tuned on but will start when turned of