Thetford N145 no longer working on 12V

Discussion in 'Fridges & Ovens' started by Evildoody, Aug 9, 2018.

  1. Evildoody

    Evildoody Funster

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    Hi all,

    My fridge has just stopped working on 12V, still works fine on 240V and Gas.
    All was working well for a 5 hour drive yesterday, but today the LED on the panel indicating battery is flashing once a second. Vehicle battery is fully charged and I have checked voltage (with engine running is at circa 14v at the back of the fridge). Initially I thought it may have been a fuse, so I checked every one I could find in the vehicle and all are ok. But this morning I switched the fridge on and SES automatically selected battery, however it only ran for a couple of hours before flagging up a fault again.
    The fridge does not have an LCD so I am not sure what the flashing LED indicates as a fault.
    This intermittent fault at least tells me it is not a fuse, any tips/suggestions?
    Does it sound like a loose connection or perhaps a circuit board on its way out?

    Thanks.
     
  2. icantremember

    icantremember Funster Life Member

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    Probably the 12v heating element has blown.
     
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  3. WillH

    WillH Funster

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    Agree with above answer, fit new element. Cost around £30.
     
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  4. Evildoody

    Evildoody Funster

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    Great, thanks guys - I will get one ordered :).
    Another quick question, where exactly on the back of the fridge is this located and is it likely to be changeable in situ via access through the external vents as opposed to removing the whole unit?
     
  5. Evildoody

    Evildoody Funster

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    Did some investigation, looks like I am taking the fridge out - looks straight forward enough.
    Disconnect power/gas/12V/240V cables etc., remove internal fridge screw covers, remove screws and slide fridge out. The following video should prove helpful.

     
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  6. Reallyretired

    Reallyretired Funster

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    I replaced one on an earlier motorhome through the bottom vent with the fridge in situ. Depends on fridge model and size of vent.
     
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  7. Evildoody

    Evildoody Funster

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    Well I had to remove the fridge :-(. The DC heater element is out now. Job next weekend is to fit the new one, test, refit fridge and reseal.

    Some pics of the fridge and circuit board - Fridge is a Thetford N145A

    IMG-20180811-WA0003.jpg 20180811_131339.jpg 20180811_131352.jpg 20180811_131455.jpg 20180811_131503.jpg 20180811_131538.jpg
     

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