so I've been called out today so to find a fault on a gas boiler the particular model of this gas
boiler I think it's a it's a British Gas 330 the heating system is a Y plan heating system
so you've just controlling hot water and central heating so everything is all working absolutely
fine but it's not working now so that's why I've been called out apparently someone has been out
to look at it but that wasn't really too sure so I'm just here looking at it now and just hopefully
seeing what I can find I haven't fixed the fault um I have done a few fault finding procedures
and just checking that the system is operating and so I just wanted to run through a couple of
things that I have done and there might be more things that I'm missing if there is anything else
you might be able to pick it up or comment on the video but this is what I've done so far so
basically we've got the programmer here fur into the kitchen over there you've got the water tank
the hot water tank up in the loft space above all the controls the three port valve Etc you've got
a thermostat here it's just a basic Y plan system to be fair okay so you've got your three amp fuse
connection unit here we turn this on as you can see the programmer lights up now this 3 amp fuse
spur is not on its own circuit it's off the the ring circuit in the house as you can see
there's power to this so undone this box here and behind here you've got a load of terminations and
so you've got the two lots of cables here that are going up to the main wiring center up in the
loft I'm not going to go up there I've already checked it all out in there it's all absolutely
fine the problem is here at the boiler so that's why we're just going to focus on this at the
moment so I just went on the internet typed it up the instruction manual for it was the first thing
that came up so I was able to read through it and just sort of get to where I am at the moment so
we've got power here if you look underneath you've got this flexible cable here that comes from one
of the junction boxes in here and from in that junction box you've got a main supply you've got
a switch live and then you've got your neutral and your earth wire and so then if we just if we just
follow it around here you can't quite see it too easily in there but in there we have got yeah so
you've got your mains live you've got a switch live the neutral you have the pump neutral and
the pump live so basically what that's telling me is that this boiler requires a permanent live
feed and it also has a switch live feed operated from the three port valve and it needs to be used
once this is then fired up from the 3 port valve then it engages the water pump as well where I'm
at at the moment is in the as you can see on the front of the screen there's no display whatsoever
on the front of the screen on the instructions it basically there's a sort of a fault finding
procedure to follow and the first thing it says is there a display on the front yes go down this
route no go down this route so obviously it says no and basically all it says just check the wiring
is there a mains live supply go into the boiler as you can see the the live is on and this one
here is the the one on the far left is the is the live so I'm just going to probe onto this
and as you can see that's indicating that the far left one which is the mains live is live
obviously we've got this control board here looks quite complicated lots of connections so then I
need to follow at live through into here and that comes through into this white cable here but the
trouble is the white cable then goes underneath it comes out and it comes down oh here we are yeah
it comes down to these two wires here the live neutral so again probe onto these ones and the
other side of this this is just the switch like the on off switch what I've done you've got the
live and the neutral coming through into this side I'm not going to do it on camera because
it's just a bit hard holding the connections the test at the same time and filming it but
basically you've got your live and neutral here this is a a reset switch or an on off switch
and so again I've tested that there's live and neutral there like I said it's no good just
testing that it's live because it could be the neutral that's certain fault so I've tested the
live and neutral here I've then tested the live and neutral coming out of there which is all okay
and then if we trace these wires back these two red and white wires that then brings us to here
and as you can see there is a fuse on that one now looking at the fuse it all looks okay
but this is basically where where I'm at I've tested to see that the live and neutral
is live and neutral here so I've turned it off disconnected this probe my probes into the holes
tested it and it's absolutely fine I probe onto the fuse and nothing comes up I'll just turn the
fuse I'll just turn it all off and just disconnect this fuse I've just dropped on the floor
and turn it back on
probe there and it's working I'm not well I'm not quite sure what it is so it's it might be
completely irrelevant it might be something that's um causing the problem I just don't know without
looking further into it the fuse itself is absolutely fine basically this is where I'm
up to I think really what they need to do is call out a boiler engineer I've done the bits
as far as I can do with regards to the electrical system everything is working every time we operate
the hot water the heating the correct and relevant terminations in here become live but the boiler's
just not working there might be a simple reset button I just can't find it not really sure but
at least I had my electrical side is okay and so really I'm going to have to tell the customer now
they're going to have to call out a gas engineer so have a look at it apart from showing that
the electrical supply to the boiler is okay but as far as I'm concerned now that's made
um if I find out what the problem was I'll do another video and we'll go through it again to
show what the problem was but I'm suspected maybe the board could be a fault I'm not really sure