Recent content by mobylec

i appreciate both your comments. have pushed valve head stem but is very tight and does'nt spring out so for some reason has seized i will need to replace. but fact remains that the flow diagnostic for central heating and terminal designation does not correspond to the schematic diagram.on page...

it appears that diverter seized causing motor head to stall and possibly damage pcb. as i said the fault diagram does not correspond to connections on boiler pcb and so voltage readings are inconclusive when compared to fault diagnosis in service manual. mobylec

hi have repaced dhw/ch diverter motor head(honeywell) mobylec

dhw ok but no heating,have changed motor head on valve but no difference,flow chart diagrams do not correspond to terminals on pcb,but indicates pcb u/s.have also found dhw/ch valve seized.any one have any other ideas boiler only 2 years old. mobylec