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my biasi boilers blowing it's fuse?

hiya, i have a biasi combi model no m90e 28s, the original problem was it was firing up for hot water but not for heating, now it's blowing the 13amp fuse in the power inlet switch,
denis bailey, November 2008
cant tell with the limmited info but should not have 13 amp fuse in anyway 3 amp

tim, January 2009
yes i agree it could be the pump or the pcb. If you no a corgi reg plumber tell him/her to follow the wires from the pump to the pcb and disconect that coneector block. put a new fuse in and and turn on just for a few seconds and see if it blows. if it does its prob your pcb if not it is the pump

trainee corgi man ?, November 2008
it could be the pump

b, November 2008
link Click here to see other fixes for Biasi M90E 28S.