baxi 105e cutting out

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12 Aug 2008
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Sheffield
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United Kingdom
hi, i have a problem with the boiler cutting off intermittently, when it does it boiler knocks (overheats?) and flame failure LED flashes, when resetting boiler, it restarts, knocks after around 10 secs and faults again. when restarting boiler pump is not running but if using hot water pump can be heard working, if boiler is left a while it will reset and work as normal for around half an hour, hope there is enough information here to help diagnose the fault, thanks Eric
 
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Diagnosing boiler faults requires tests and investigations.

If you can do a thermal survey and quote the gas valve setting parameters then I could have a guess.

Otherwise all I can say is that it might have a blockage or flow restriction.

Tony
 

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