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I had this problem with the same unit. It happened within the warranty period and they replaced it for me but I think I worked out what went wrong and how to avoid it happening again. When you use the hot water tap, scale can build up in the narrow nozzle located at the tap outlet. In fact...

Been offline for a few days. My phone line went down and BT took their time about it. I have now purchased and fitted the new stem and sure enough, it fixed the problem straight off and works perfectly now. Big thanks to Boilerman2 for that. I like your logic BM2 as having to reset the...

Ok, scrub that last question - just found a solenoid stem. Can't believe how pricey they are though. Half the price of the entire pump! Cheers

Thanks Mandate and Boilerman2. I have already tested the coil in situ by placing a screwdriver in the centre to see if it exerts any force on it. I didn't feel any which is why I tried the rewire to mains voltage. What I still don't understand about this is why both control boxes (old and...

Just rereading the replies: I misread 'coil' as 'valve' earlier. A dodgy coil is something I had not thought about before. But I still don't get why it initially fires up every single time and then only after the initial sequence (20 sec) does the flame go out at the same time as the ignition...

Thanks to all for your replies. It is a gravity fed system. I checked the pump pressure earlier in the year and set it to the correct pressure and it has not been used since. It was not far out anyway. I am not sure how old the pump is but I did take it apart a while back and the drive pin...

Ok, so it's not the control box - I have tried a new one and the results are exactly the same. I did get it working for a while last night, though not because of the new control box. Had a look at the solenoid valve on the oil pump and it seems to work ok - internal spring operational etc. I...

I am getting a lockout on my Danesmoor 15/19. It fires just fine and continues until the ignition stops and then the flame dies. It looks as though the controller is shutting off the pump with the ignition. This seemed to be a very obvious photo cell problem to me but I have replaced it with...

Hi xr4x4, thanks for pointing that one out. I realise now the order is not quite right. I would, of course, have to convert the second side to sealed before joining them. Was looking at the Grant website last night. Their external boiler can be fitted with a kit so I could buy the vented...

I need to get our heating upgraded. It currently consists of two entirely separate open vent systems in the same property running off a Danesmoor 15/19 and a Trianco 15/19. Both are a bit ancient and the Danesmoor has been playing up for a while now. We use quite a bit of oil as you might...