Miele K 8652 SD fridge, deadish, give up or investigate?

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  • #95929
    zxcvbnm
    Participant

    Our Miele K 8652 SD, a large freestanding larder fridge, started flashing its interior light this morning. The temperature led on the front is flashing as well. I haven’t heard the compressor stuff start all day either.

    Turning it off at mains achieved nothing, just some umm umm sounds for a bit when turned back on.

    Pressing the fan button makes it go umm ummm a bit but nothing spins up.

    Pressing the super-cool button does nothing.

    Adjusting the temperature dial changes the led from one temperature to another but the led still flashes and nothing quite kicks in. I wouldn’t say it makes a click click sound so much as a umm umm or possibly thrum thrum as if it is trying to start but can’t quite kick in.

    The compressor is pleasantly warm but not scorching. There is an opaque plastic shroud on top of the compressor with a bit of yellow gunk in the bottom of it, I don’t know if that came with it or means something.


    It must be about 12 years old. So basically I’m sitting here thinking how likely it is that there is something worth investigating, or having someone else investigate, or whether it is almost certainly the compressor and time to throw it away. Which is obviously irritating as its mostly just fine. Looks like the samsung equivalent is about £600 with a five year warranty.

    Oh well. Any thoughts?
    Thanks

    #461754
    zxcvbnm
    Participant

    Well slight progress. Got the starter relay thing out.

    I checked Miele was bought in 2008 for £550 so 11 years old. Which doesn’t seem much for a smart fridge, grr, the frigidaire now taking all the strain is over 20 years old and still going. Of course thats the elite model.

    Starter relay seems to be one of these
    https://shop.electrolux.co.uk/p/2390286249

    available from lots of places under slightly different names.

    Oddly many of them, such as this cheaper ebay one, appear to be reversed? I’m assuming they just flipped the image though it will be annoying if I’m wrong…

    https://www.ebay.co.uk/itm/153023230111

    Must look at the internet instructions on how to test with a multimeter and see if I can work out which pins to test.


    Whether the compressor getting luke warm means its not the relay starter bit? Whitegoods page on fridges seems to suggest I may be kidding myself. Of course could buy one and try quickly and then return it…


    Dodgy hvy67aa compressor is available from german ebay sellers for £90 but I’m clearly not going to swap one myself and I suspect that rapidly becomes uneconomic.

    Hmm.

    #461755
    zxcvbnm
    Participant

    Oh relay doesn’t sound particularly rattly sadly.

    #461756
    zxcvbnm
    Participant

    Hmm, putting a multimeter in the two holes give a resistance of about 17 to 180 fluctuating madly. I’m not sure what that tells me, possibly that I have a cheap multimeter?

    I was rather expecting a solid number between 10-100 or nothing.

    #461757
    zxcvbnm
    Participant

    What do people think of this
    https://www.amazon.co.uk/gp/product/B07JHMNHHF/

    3 in 1 fridge hard starter. I though it would bypass the thermostat and capacitor and give a basic proof of if the compressor could run.

    Then I noticed it said 115v?

    Still worth a try or pointless with uk voltage?

    Thanks

    #461758
    Tony R
    Participant

    Sounds to me like the control board is malfunctioning, had it before were the fridge lamp flashes on and off, and no operation from buttons is able to be made, this is a Liebherr made unit and you can buy and fit their board, which maybe cheaper than the same part from Miele.

    #461759
    zxcvbnm
    Participant

    Thank you Tony. That is a helpful idea. Perhaps I have been thinking about it all wrong.

    Now if it is the electronics above that are having trouble the presumably a should be able to start the relay/switch and compressor manually, bypassing the thermostat and demonstrate that they are still working and that it might worth repairing!

    But how?


    So on my relay/starter bit I have a terminals for live, neutral and earth plus two extra terminals on either side.

    The mains cable obviously goes to the live, neutral and earth.

    The capacitor cable has a neutral and a live wire, neutral goes to the neutral terminal and the live goes to a separate pin on the side.

    The thermostat cable, which presumably I wish to bypass, goes to live and neutral and then has a third black wire which goes to a separate pin on the side. This black wire presumably starts the compressor.

    Does that make sense?

    Now somehow I can presumably move the wires to trick the compressor to starting without the thermostat. But how?

    Do you think just moving the mains live wire to where the thermostats black cable connects would do it?

    I’m a little wary of accidentally short circuiting or frying something.

    Thanks

    #461760
    Tony R
    Participant

    You are correct in that the black wire is the power supply to the compressor from the board, to test compressor you will need to put a live feed to the black wire pin on the relay/overload, this will start the compressor to confirm it is OK, but nothing else will operate I suspect, ie fans etc, I still believe the integral board is malfunctioning.

    #461761
    zxcvbnm
    Participant

    Sorry I became distracted by other things and drifted away there for a bit. Still I now have a £500 Polish Bosch fridge which I hope was not made to be discounted to suckers… Still hoping to reactivate and get more out of the Miele.

    I did test the compressor wiring it directly as suggested. And it did work just fine. Obviously the fans did not come on in the fridge or anything but I ran it for half an hour and the fridge became cold that it must be ok.

    So I’m looking at the PCB which is marked as a 6133 698-00 KSv3_04-1 It looks almost exactly like a 6133696 for Liebherr fridges. But with slightly different button/led positions which is annoying but bares out Tony saying they come from the same factory.

    If anyone know a cheaper liebherr equivalent I would be very interested to know 🙂 The usual online parts sellers want about £130 a Miele part which seems a little high for a gamble.

    Otherwise my plan is something like;

    Give it a good hoover of the dead flies in the pcb put it back together and pray, you never know.

    Call Miele on the off chance they would sell me another one, they did sell me a new door handle lever a year ago for £30 when online wanted £100 so there is a faint chance, suspect they will just say don’t touch.

    Otherwise look into the online repair services that will repair PCB boards for about £50. Perhaps it just needs a new capacitor block or something…

    Thank you, and any ideas on cheap pcb sources obviously welcome.

    #461762
    Tony R
    Participant

    Liebherr PCB, 6133696 is listed at £81.05 plus carriage and VAT and in stock, have you tried obtaining it on this site ?

    #461763
    Tony R
    Participant

    Just looked as there appears to be differing part numbers depending on the index number, if you can provide this I will recheck, it will be something like 164-20A, the buttons will then match with the board.

    #461764
    wordage
    Participant

    Hi there. I know this is a very old post but wondered if the fault had ever been resolved. I have the same make and model of fridge and same fault. Found the same PCB reference 6133 698-00 KSv3_04-1, and the following numbers on the PCB 715.074 and 2401. Can’t seem to find the right part to replace, any ideas?

    #461765
    Tony R
    Participant

    The PCB is still available ( 6133698 ) try the spares dept on here.

    #461766
    wordage
    Participant

    Tony, many thanks for confirming the model, unfortunately the site does not seem to be accepting orders at the moment. I will try and search online to buy. Thanks for your help
    BTW I also found the index 20G 164. Took me a while 🙂

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