Boiler circuit board problem

raymondoftoulouse · 19 January 2014 at 11:41PM

Hello everyone,

Hoping someone with some boiler/electrical experience can help me.

I moved into an old flat with an old boiler (Vokera mynute 12-48) which wasn't working when I first moved in. had a plumber/heating engineer come out to look at it and he charged me about £300 to replace the gas valve (expensive part) and service it.

Since then it stopped working again. I could hear a sort of electrical fizzing in the plastic case holding the circuit board so I opened it up to have a look, tightened various screws and dusted it a bit. Tried switching the boiler on with it open and miracle! Boiler fired up. Been working fine since until tonight when I noticed the heating didn't come on. Went through to have a look and one of the connections on one of the components on the board seems to have burnt out (the solder on the back is gone and the board is black where its gone - also burning smell). Which brings me to my question..... can I replace individual components on a boiler circuit board or do I have to replace the whole thing. I'm getting a new boiler in a few months and after getting stung for £300 on this one already I'm trying to avoid any sort of expense and board would probs be £50+fitting.

If I can do components individually how do I find out what the piece is to replace it? the installation/service manual have doesn't list circuit board components and I can't take the board out to take to an electrical shop without cutting a cable... Not sure what to do.

Any help hugely appreciated.

Many thanks
Ray

molerat · 20 January 2014 at 1:16AM

Very difficult to get hold of pcb diagrams, they are normally top secret. If they gave the peasants access we would all be fixing our boilers for the cost of a 50p component instead of the £100s they want to charge for a new board. Unless you are competent in diagnosing, identifying and replacing pcb components then replacing the board is the only sensible way, there are companies that supply re-con boards.