My boiler went tits up on Monday. I"m an electrician by trade so was able to diagnose the internal fan as the culprit.
I checked a few places and managed to find one in stock locally at £158 - fml. It wasn"t too bad actually as the other prices I"d seen on the net were £300 and £178.
I didn"t look too closely at it and assumed that the only way to get access to change the fan was to take the boiler off the wall. As I didn"t want to be messing with gas connections I got the phone number of a (semi-retired as it turns out) plumber and arranged for him to come and change it on Wednesday morning whilst I was at work (under Petch"s supervision after his night shift).
Before I went to work I got the new fan out for him and it was immediately obvious that it actually fitted from below and could be replaced with the boiler in situ. Bugger. The plumber was on his way now anyway and it would save me a tricky job so hey-ho - gg another £55 for his 45 minutes work (actually I can"t really grumble at that).
So, fan changed, the boiler sparks up and plumber man gets on his way.
11 minutes later, according to Petch in a call to me at work, the boiler goes off again and won"t come back on. God love him, Petch is a fantastic bloke and in some ways very clever. But anything technical and you might as well forget it. So I took it with a pinch of salt and assumed either the programmer or roomstat had switched off.
However
when I got home I soon found that the boiler had in deed packed-up again.
By now, after a couple of days without heating and one night"s good frost, it was a little chilly to say the least.
I set about finding the cause of the problem. It was clear quite quickly that it was a totally different fault.
Eventually I found the fuse for the heating in the airing cupboard had blown. I changed it and the pump beside me immediately sprang into life. However the boiler steadfastly refused to fire.
I"ve made some further investigations tonight, following the fault-finding flowchart to a dead end
I can only assume it"s the printed circuit board. Initial searches put it in the £150 bracket.
On closer inspection, I think I found the cause of the fault. On the casing of the new fan there"s a tiny little "splash" mark as if something shorted to earth. There"s a pressure switch adjacent to the fan which I had to change a year or two ago. When I
bodged repaired it, I taped up the terminals after I"d removed the insulating boots for test purposes. I reckon when he changed the fan, he shoved the pressure switch back in a bit tight against the fan casing and the terminals cut through the tape & touched the casing, blowing the fuse and damaging the PCB.
I"m a bit nervous though as the PCB
looks absolutely perfect and £150 is a lot to spend on a hunch. I reckon I"ll ring Baxi, the manufacturers, and run it past them to get their opinion.
All being well, so long as I can get a replacement, I"ll be nice and toasty this time tomorrow