Thetford N150 Fridge Fault code 9 HELP!

Discussion in 'Fridges & Ovens' started by DP_JAY, Apr 24, 2014.

  1. DP_JAY

    DP_JAY Funster Life Member

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    Getting ready for peterborough & just found fridge not working on gas.
    Gas is getting to fridge & it lights straight away but the igniter keeps ticking until it then goes out. Display is showing fault code 9 which is "Gas lockout because flame fails to ignite".
    Has all the symptoms of a thermocouple failure but I can't see one anywhere?
    Anyone KNOW how the flame sensing works?
     
  2. DP_JAY

    DP_JAY Funster Life Member

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    just spoken to Thetford & they tell me the igniter electrode acts as a thermocouple?:Eeek:

    More electrickery:Angry: I hate electronics:Angry::Angry:

    They also tell me it's more likely the "power board" thats faulty:Angry::Angry:

    Anybody know who has the spares?
     
  3. DP_JAY

    DP_JAY Funster Life Member

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    Leisure spares at Boroughbridge have the parts so it's looking like a detour in the morning to collect them. It must be a common fault because when I said about getting them in the morning they said "If you want a board keeping you'll have to order it now as we've only got 5 left:Rofl1::Rofl1:When I said you won't sell all them by tomorrow they said " the last 6 phone calls have all been for that card:Eeek:
     
  4. jonandshell

    jonandshell Funster

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    Take the cover off your burner and make sure it all the slots are clear.

    Ours gets dirty at the igniter end causing the same fault!:BigGrin:
     
  5. DP_JAY

    DP_JAY Funster Life Member

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    Thanks, done that,the igniter is roughly in the middle & all the slots are clear & burning correctly.
     
  6. jonandshell

    jonandshell Funster

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    Looks like it might be the igniter/thermocouple or board.:cry:

    If you are still coming to Peterborough, I have the diagnostic procedures printed out in the van.
     
  7. DP_JAY

    DP_JAY Funster Life Member

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    Thanks for that, turns out it was the spark electrode (£9), seems it does act as a thermocouple but I dont get how?

    Many thanks to leisurespares.co.uk, very helpful.
     
    Last edited: Apr 28, 2014
  8. jonandshell

    jonandshell Funster

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    Had a code 9 tonight!!!!!!

    To answer your question, the sensing is done by flame rectification!
    Apparently, AC current is passed down the igniter which then arcs to the burner body. When the flame is burning, a resistance occurs which blocks the AC current in one direction.
    When this happens, the power board now knows the flame is present and the fridge operates normally.
    Tonight, on ours, the fault turned out to be a dodgy connection from the burner to the frame of the fridge, which is all negative.
    Simply loosening and tightening the burner retaining screw fixed the fault.

    Now sitting here feeling quite chuffed to have found the problem after removing and cleaning all connections on the power board!
     
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