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Ferroli problems Boiler was working fine until we noticed a small leak. switched off repaired leak but then when boiler was turned on again it started to show fault A51. This is poor combustion/flue blocked in codes but have checked flue (all clear), fan confirmed as working (powered directly) and |PCB fuse has not blow. Also continuity tests show power to fan. resetting does not work either. anyone got any ideas?? thanks

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6ya6ya
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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: fault code ( nocn ) on a ferroli boiler

if nocn is on the time clock then check the wiring to time clock and if all good then it is the time clock at fault and will need repleacing

Posted on May 04, 2010

rachdawkins
  • 1 Answer

SOURCE: ferroli optimax 25 c heating won't come on

Did you ever find out what this was as I have the same problem??

Posted on Sep 12, 2012

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