Fridge tripping the electrics

Discussion in 'Fridges & Ovens' started by Pezza, Feb 9, 2014.

  1. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry
    Morning all
    Went out for first trip last weekend and when preparing the food supplies the wife told me the electric to the van on the drive was not on. What had happened was she put the fridge on and it tripped the power. I didnt have time to check it so we just used it on gas for the weekend. It worked fine on 12v whilst driving too. Before I start investigating I wondered if anyone new a common fault or issue to start with? The unit is a Thetford N100A or N145A fridge freezer with the electric switches not rotary dials.
    Any help greatly appreciated thsnk you.
     
  2. DP_JAY

    DP_JAY Funster Life Member

    Joined:
    Mar 17, 2010
    Messages:
    1,798
    Likes Received:
    1,022
    Location:
    Cark, Cumbria
    Sounds like a wiring fault or the 240 element is burnt out.
     
  3. Tea Bag

    Tea Bag Funster

    Joined:
    Nov 3, 2013
    Messages:
    1,163
    Likes Received:
    1,943
    Location:
    Portugal
    Hi.
    This is of no help at all, but,we had the fridge fuse tripping in a unit,some one had piggy backed power off of the fridge supply to an appliance,THAT was the cause,so,try checking what else is powered on that circuit.
    I am NOT an electrician and a very bad speller,but i have got this far:Rofl1::Rofl1:
    Best of luck.
    Tea Bag
     
  4. WillH

    WillH Funster

    Joined:
    Feb 9, 2008
    Messages:
    1,618
    Likes Received:
    1,291
    Location:
    SW Scotland
    We had the same last year in France, it was the 240v element. Got one off eBay but it was a real pain changing it, had to take the fridge out to get access.

    Rgds
    Bill
     
  5. laurieash

    laurieash Funster

    Joined:
    Jan 29, 2014
    Messages:
    511
    Likes Received:
    294
    Location:
    HALIFAX
    Fridge

    common fault had it on my old caravan element gets moister in and goes to earth,
    change and it will be ok. but i have also heard that run on gas for a few days some times drys it out then ok.
     
  6. pappajohn

    pappajohn Funster Life Member

    Joined:
    Aug 26, 2007
    Messages:
    29,478
    Likes Received:
    16,963
    Location:
    YO11 2BD
    could even be a mouse attack.

    Entry via the fridge vent and some tasty pvc wiring in there.

    Remove the vent and have a look around.
     
  7. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry
    Thanks all for the advise. All clear of mice so I'm looking at the element. I've got the fridge out ok but does anyone know where the element is!!?? It is a Thetford N145 unit.
     
  8. WillH

    WillH Funster

    Joined:
    Feb 9, 2008
    Messages:
    1,618
    Likes Received:
    1,291
    Location:
    SW Scotland
    The two elements, 12v and 240v, are in tubes above the gas flue. There should be some galvanized sheet clipped round them, full of glass insulation. You need to disconnect the element from the powerboard before removal. There is a resistance reading on the Thetford website somewhere to tell you if the element is duff or not. The insulation sleeves on mine are blue, yours should be as well, just follow them.

    Rgds
    Bill
     
  9. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry
    Thanks Bill , very helpful
    I have found the two blue sleeves, took off the galvanised sheet and see where the elements seems to just rest in the holders. I'm just going to check the website as you suggest to measure the resistance. If it is found I need to replace the 240v element does this come as a complete unit including the wiring back to the terminals and the blue sleeving?
     
  10. Ed Excel

    Ed Excel Funster

    Joined:
    Nov 27, 2012
    Messages:
    869
    Likes Received:
    577
    Location:
    Ribble Valley
    Ours had to be replaced last year. The element came complete with a sheathed cable and terminations for connection to the control panel.

    You could work out what the resistance should be. The wattage for yours should be on a label inside the fridge. You can calculate the element resistance from:
    I=W/V then R = V/I
     
  11. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry
    Thanks, I've worked out the current to be roughly 1amp (233W/240V)
    Therefore resistance 240/1 = 240 Ohm
    I get 236 with meter so if the voltage ( I didn't measure it) is slightly less than 240, as it probably is then the element measures ok? So I presume that theory is wrong and the fault is elsewhere? I did plug it back in and retest and it tripped again.
     
  12. Larby

    Larby Funster

    Joined:
    Jun 17, 2012
    Messages:
    1,682
    Likes Received:
    3,878
    Location:
    North Essex
    Just a thought, as you have it all to bits, is it worth trying to power up with element disconnected? If it still trips then fault elsewhere?
     
  13. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry
    Thanks - I've just tried that (can't believe I never did it anyhow) the electric does not trip now, so it does look like the element. The fridge tried to start but goes off after 20 secs or so - presumably due to no element in circuit?
     
  14. WillH

    WillH Funster

    Joined:
    Feb 9, 2008
    Messages:
    1,618
    Likes Received:
    1,291
    Location:
    SW Scotland
    Just checked the service manual, the resistance for your fridge element should be between 216 ohms and 266 ohms so sounds as if your element is okay. Next are the fuses on the power board, or the power board itself.

    Rgds
    Bill
     
  15. Gizmouk

    Gizmouk Funster

    Joined:
    Nov 6, 2013
    Messages:
    964
    Likes Received:
    1,721
    Location:
    Essex
    Element resistance can be in tolerance (and not open circuit), but it could be leaking down to earth - resulting in RCD tripping.
    If that is the case, then the element will still need replacement
     
  16. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry
    I think that is the case as when I disconnected the element and switched the unit back on it didn't trip the mains
     
  17. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry
    Thanks all for your help with this. I got a new element in the week, fitted it yesterday and all is now as it should be.
    Much appreciated
    Thanks
    Pezza
     
    • Like Like x 2
  18. Pezza

    Pezza

    Joined:
    Jul 30, 2011
    Messages:
    53
    Likes Received:
    7
    Location:
    Coventry

    Hi All, thanks for all your help last year with this issue. Went out in the van this weekend and the fridge wouldn't work on the mains hook up - fine on gas and battery - it wasn't tripping this time, just not working at all. Would this be a faulty element again. Power to the socket where the fridge connects is fine. It has been working fine since I changed the element in Feb 2012
    Help as always greatly appreciated
     
Loading...

Share This Page