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Idle Banter For non SV and non bike related chat (and the odd bit of humour - but if any post isn't suitable it'll get deleted real quick). There's also a "U" rating so please respect this. Newbies can also say "hello" here too. |
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16-11-14, 09:24 PM
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#21 |
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Member
Join Date: Feb 2012
Location: Highland
Posts: 80
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Re: Boiler help
The PCB uses the electrode to pass a current through the flame. The ionization in the flame creates a path for the current. If the electrode isn't properly in the flame, current won't flow and the PCB will shut the gas off. As already mentioned, the electrode could be burnt, so too short to reach the flame, or the electrode is out of position, so not in the flame, or the flame has moved, so not on the electrode. Is the electrode visible when in use?
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16-11-14, 09:33 PM
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#23 |
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Member
Mega Poster
Join Date: Oct 2011
Location: Yateley, Hants
Posts: 2,306
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Re: Boiler help
Dad reckons it may be the thermo couple?
Sent from my magical portable device
__________________
Yam XT125R - Sold SV650 -Sold DL 650 K6 - Sold 2012 Street Triple R - For Sale - Linky here |
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16-11-14, 09:41 PM
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#24 |
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Evel Knievel
Mega Poster
Join Date: Jun 2007
Location: Eastleigh
Posts: 4,641
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Re: Boiler help
That's what my old man said with his over the phone diagnosis but all the error code point towards the flame detection electrode.
personally I don't need heating and I'd leave it broken, but I have one of those nagging voices that tells me to do stuff around the house. |
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16-11-14, 09:42 PM
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#25 |
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Member
Mega Poster
Join Date: Oct 2011
Location: Yateley, Hants
Posts: 2,306
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Re: Boiler help
Dad's are always right with their remote problem solving.
__________________
Yam XT125R - Sold SV650 -Sold DL 650 K6 - Sold 2012 Street Triple R - For Sale - Linky here |
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16-11-14, 10:09 PM
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#26 |
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Guest
Posts: n/a
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Re: Boiler help
Im sure the electrode just bolts in from the front once the inner case is off. Just a crap Allen head bolt holding it in
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16-11-14, 10:14 PM
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#28 |
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Member
Join Date: Feb 2012
Location: Highland
Posts: 80
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Re: Boiler help
If the system has both forms of flame detection, then a faulty thermocouple could cause the gas valve to shut and the other detection system wouldn't see a flame, so give that error message. So could be a faulty thermocouple if the system has one.
When you did the continuity check were you checking between the disconnected electrode and earth? If so, it sounds as though the electrode, or its wiring/insulation is shorting to earth. A new electrode assembly should cure that. |
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16-11-14, 10:17 PM
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#29 |
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Guest
Posts: n/a
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Re: Boiler help
No thermocouple on these boilers, they're far to cheap and reliable to be on modern boilers
 Its a fixed shape so can only go in one way. Ive never pulled the fan ect to change an electrode on these. |
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16-11-14, 10:29 PM
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#30 |
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Evel Knievel
Mega Poster
Join Date: Jun 2007
Location: Eastleigh
Posts: 4,641
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Re: Boiler help
might it be worth pulling it apart to clean off the burner?
I've just been flicking back through the book and it's never been serviced. It was installed in 2008. BTW only bought the place in Feb so it's not my fault. |
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