Help please Electrolux freezer

Discussion in 'Technical Repair' started by Dano41, Mar 24, 2019.

  1. Dano41

    Thread Starter Member

    Aug 1, 2016
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    electrolux circuit board.2.jpeg Hi,there was a power outage at our house the other day when it came on our freezer didn't power up.There is power coming to the board but it is not working.I have to wait at least two weeks to get a replacement board.Have done electrics but my knowledge of electronics is minimal.If it was a power surge that damaged the board is there any protection which would be built into the board and could be replaced or does the board just get fried.Any help with this would be greatly appreciated. View attachment 173166
     
    Last edited: Mar 24, 2019
  2. Yaakov

    Well-Known Member

    Jan 27, 2019
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  3. Dano41

    Thread Starter Member

    Aug 1, 2016
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    Another pic. electrolux circuit board.2.jpeg
     
  4. Dano41

    Thread Starter Member

    Aug 1, 2016
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    Hi Yakoov,is that picture close enough?
     
  5. Yaakov

    Well-Known Member

    Jan 27, 2019
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    It’s surely better. Is this diode broken at the end opposite the band?

    CDC432D6-88B4-476E-9412-CC15072B1D6E.jpeg
     
  6. Dano41

    Thread Starter Member

    Aug 1, 2016
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    That diode D1 tested 0.6 and OL.
    D3 there is a crack and the diode test showed 1.8 and 0.4 electrolux circuit board.33.jpg
     
  7. Dano41

    Thread Starter Member

    Aug 1, 2016
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    On the diode is written MUR 120 0409.
     
  8. Yaakov

    Well-Known Member

    Jan 27, 2019
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    You said power is getting to the board, does it get to that diode and not get past?
     
  9. Yaakov

    Well-Known Member

    Jan 27, 2019
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    Is this capacitor swollen?

    upload_2019-3-24_10-37-5.png
     
  10. Dano41

    Thread Starter Member

    Aug 1, 2016
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    I am getting 237v both sides of the diode so power getting through.The diode is not swollen.
     
  11. Yaakov

    Well-Known Member

    Jan 27, 2019
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    I assume you mean capacitor.
    Is the diode physically separated? If you try, does it divide at the crack?
     
  12. drc_567

    AAC Fanatic!

    Dec 29, 2008
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    There seems to be a blue lozenge shaped part adjacent to C14. The label seems to say Vxxx? Could that blue lozenge be a transient voltage supressor of some kind? ... Had one if those take out a garage door opener after a near-lightening strike ... just replaced the whole board though. ... It might be interesting to see if there is power on both terminals of the blue capsule looking part.
     
  13. Dano41

    Thread Starter Member

    Aug 1, 2016
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    Sorry did mean capacitor.The diode does not separate.
     
  14. Yaakov

    Well-Known Member

    Jan 27, 2019
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    Barring obvious "skid marks" (burnt comments, you'll need to trace the circuit and find where things stop working. drawing a schematic to help you follow signal flow from the power input to where it fails.
     
  15. Dano41

    Thread Starter Member

    Aug 1, 2016
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    close view of component beside C14 .Voltage at one leg is 237v the other leg is 0.18 v. circuit 22.jpeg
     
  16. drc_567

    AAC Fanatic!

    Dec 29, 2008
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    ... varistor?
     
  17. wayneh

    Expert

    Sep 9, 2010
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    I just want to be sure we don't miss this - that cap looks suspicious from the top view but of course it's hard to tell. Even a slight bulge would be cause for replacement. Hell, random replacement of all the electrolytic caps isn't a bad idea. I know it sounds crazy but sooooo many board failures are due to failed capacitors. Caps can fail on ESR with no visual clue. Just replacing them is likely to extend the life of the board and it saves a lot of diagnostic time.
     
  18. wayneh

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    Sep 9, 2010
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  19. Yaakov

    Well-Known Member

    Jan 27, 2019
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    That's a MOV, a Metallic Oxide Varistor, to protect from lone spikes. It's resistance changes with the load. They are hard to break but it could be bad.
     
  20. wayneh

    Expert

    Sep 9, 2010
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    I'm pretty sure that means it's still good. When they clamp, they short and sacrifice themselves.
     
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