Vokera Mynute 14-48 SE Elec issue?

[aidanb]

If all the above checks are ok, the manual says to check wiring and connections to pressure differential switch.

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Its that switch that outputs 115v to A, which I have, very confusing!

The board is brand new but identical to the 15 year old one taken out.


I'm not sure how I would get a spark at the board to be honest? The spark electrode is on its own electrical connector

 

[aidanb]

Should the spark be before gas supply? Maybe its sensing no spark and not allowing the gas valve to open?

 

[Doodlebug]

It's looking like an ignition fault but very difficult to say without being there, only so much I can tell you to check and obviously you can't access the combustion case as your not GSR, it may even be that the gas valve isn't opening up, only way to check would be to attach a u-gauge to the gas valve but again that would need a gas safe engineer. What area of the country are you in?


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[Doodlebug]

Should the spark be before gas supply? Maybe its sensing no spark and not allowing the gas valve to open?

The spark would be at same time as gas valve opening and once lit flame rectification would take place. Is it easy to see through site glass? Maybe there is a spark and you just can't see it.


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[aidanb]

I take it the gas valve is just a straight forward solenoid valve (though there are 2 live connections there, so 2 solenoids?), so no power to it, the valve stays shut? If so, definitely no gas getting through.
I'm a few miles south of Birmingham. The boiler, quite shamefully, hasn't been serviced for quite a few years, but still have the last guys number and I work with a few different blokes with Eon, just didn't want to find it was something electrical!

 

[aidanb]

The spark would be at same time as gas valve opening and once lit flame rectification would take place. Is it easy to see through site glass? Maybe there is a spark and you just can't see it.


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Thats my theory out then! I can't remember ever seeing a spark, and certainly can't see one now.

 

[Doodlebug]

I take it the gas valve is just a straight forward solenoid valve (though there are 2 live connections there, so 2 solenoids?), so no power to it, the valve stays shut? If so, definitely no gas getting through.
I'm a few miles south of Birmingham. The boiler, quite shamefully, hasn't been serviced for quite a few years, but still have the last guys number and I work with a few different blokes with Eon, just didn't want to find it was something electrical!

There is two solenoids as one would be for pilot and one for full gas once rectification has taken place. If you getting no voltage to the gas valve after its passed all the previous checks then I'm stumped, will be interesting to see the outcome of this, unfortunately I'm too far away to just pop in otherwise I would as I like a challenge lol. Let me know how you get on mate.


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[aidanb]

There is two solenoids as one would be for pilot and one for full gas once rectification has taken place. If you getting no voltage to the gas valve after its passed all the previous checks then I'm stumped, will be interesting to see the outcome of this, unfortunately I'm too far away to just pop in otherwise I would as I like a challenge lol. Let me know how you get on mate.


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Will have to get it sorted, getting a bit cold now! There was a 2nd identical boiler fitted at the time at a different house, which is being removed next week (but still in working order), so there will be a complete set of spares available to swap over when it gets done.
Cheers for the help, i'm baffled to be honest!