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Hi The cover has a serial no 42005748-001, nothing else of front, but just noticed some instructions inside, including an instruction saying that the white wire on the MV should not be used on fully pumped systems??? do i have a fully pumped system?? now I am confused!!

Hi thanks for your post The pump does work on HW, and the fuse is blowing when switching on HW, but only under certain circumstances, ie when CH and HW are up to temp and some HW is used when the stat calls this will blow the fuse? Hope I am making sense? Regards

fuse blew when switched on after summer, motorised valve was not working, so changed that, that is working ok now, but fuse still kept blowing, so i was advised to have the pump changed, which i did, but fuse still blows??

Hi, thanks for your response, I am a CH/HW novice, but i am almost sure that the system is a Pumped CH gravity system, the pump does come on for the HW, but goes off when up to temp, which i believe is correct?? I have 1 x honeywell v4073 mid position valve, (new powerhead)

no all seems good, checked all connections all seem ok

I have a baxi solo boiler (3 years old) standard programmer and roomstat

fuse is 2amp

Hi can anyone help the glass fuse in the wiring centre in my airing cupboard started blowing randomly, after inital fire up of CH after the summer months, I have a standard gravity fed system? changed motorised valve, (v4073a) and pump (grundfos) but still blows fuses randomly?? I have...