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Hi, I have a Bosch fridge/freezer KGV3120 GB/01. It works normally, but after a while(when it reaches the thermostate temperature) it stops and does not start again. When switched off for a while it starts again. I heard the problem is a sensor built into the fridge wall failing. The sensor (NTC? - measuring evaporation temperature I think) is built in for other markets and can be safely by-passed in the UK climate. I need to identify the correct wires to the sensor so I can disconnect them, then solder them to each other with giving zero resistance. For that I need a wirering diagram. Can you help me? Regards, Claus M. Christiansen.

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  • Claus M. Christiansen May 18, 2011

    There is no fan that blows cold air from the freezer into the fridge.
    I suppose you mean the defrost timer is located inside the freezer in the back, I find no plastic panel there.
    It looks as if it is not my fridge/friser you are talking about. Mine is a KGV3120 GB/01.
    Please advise me.

  • Claus M. Christiansen May 25, 2011

    My Bosch KGV3120GB/01 is different, it has 4 wires (2 blue, 2 brown) rather than the 3 (1 black, 2 brown).

    A fellow made a solution to his problem (see "Problem and solution" below). That and your input gave me the solution idea.
    I could see that Dark Brown/Light Blue wires go as one cable into the fridge and that the Light Brown/Dark Blue as another cable.
    I cut the Dark Brown with Light Blue and joined them at the plug to the PCB, and left the Light Brown and Dark Blue as they were.
    That fixed my fridge problem and it is now running fine. It switch off around 5 degrees and on around 7 degrees with the "1- > 5 adjustment dial" on 1 (the temperature can be adjusted by the "1- > 5 adjustment dial").
    This fix indicates that the Light Brown/Dark Blue wires must be the connection to the temperature sensor.
    ---------------------------------------------------------------------------------------------------------
    "Problem and solution":
    I have a Bosch KGV3120GB/01 and am experiencing exactly the same non-cooling problem - where we have to power it off and wait before switching it back on in order for it to re-cool.
    Like Sele, I have found 4 wires (2 blue, 2 brown) rather than the 3 (1 black, 2 brown) that others have found I saw the earlier instructions from Jan.
    Q: Which 2 wires (of these 4) need to be joined together?
    Jan? Sele? Anyone?
    Thanks for any input!

    Jan
    Well, with a little trial and error, i've answered my own question!
    Indeed the two blues show little to no reistance between them.
    But, joining the 2 middle wires together (Dark Blue with Dark Brown) seems to have done the trick! The fridge keeps on running and cooling, and the 1- > 5 adjustment dial still does it's job. Magic!

  • Claus M. Christiansen May 25, 2011

    My Bosch KGV3120GB/01 fridge/frizer no automatic re-start problem fixed by a combination of your input, the link to solutions you gave me, and a little creative thinking.
    My Bosch KGV3120GB/01 has 4 wires (2 blue, 2 brown) from the PCB plug at the right hand side (closest to the on/off switch) behind the panel in top og the front of the fridge.
    I could see that Dark Brown/Light Blue wires go as one cable into the fridge and that the Light Brown/Dark Blue as another cable.
    I cut the Dark Brown with Light Blue and joined them at the plug to the PCB, and left the Light Brown and Dark Blue as they were.
    That fixed my fridge problem and it is now running fine. It switch off around 5 degrees and on around 7 degrees with the "1- > 5 adjustment dial" on 1 (the temperature can be adjusted by the "1- > 5 adjustment dial").
    This fix indicates that the Light Brown/Dark Blue wires must be the connection to the temperature sensor.

  • Claus M. Christiansen May 25, 2011

    Hi Andie,

    Where can I give you the 4 thumbs up?

    Regards and thanks,
    Claus.

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  • 710 Answers

Hi Claus,

You may have gotten this twice. My internet connection went down just as I was posting it.

I didn't find a wiring diagram, but did find a forum where someone gave instructions on how to short the sensor. I'll describe how to do it in case you can't access the website. Here's the web address: >>>> http://www.reviewcentre.com/vt100228_start0_orderasc.html
1. Take the panel off by removing the 2 screws.
2. Look at the back of the panel and you will see a white plug with a large black wire and 2 brown wires.
3. With the panel hanging from the fridge, locate the brown wire that is closest to the fridge. Wire this one to the large black wire with an insulated wire.

The large black wire is the power wire. By wiring that with the brown wire closest to the fridge, you will bypass the sensor.

Good luck!

Hope this helps. If it does, I'd appreciate a 4 thumbs up. Thanks,

Handie Andie

Posted on May 19, 2011

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  • Master
  • 823 Answers

It a defrost timer that you are talking about. The fridge has a cycle that is handled by a defrost timer. Thats what keeps the coils from freezing solid in the freezer part and it also blows cold air from the freezer into the fridge to keep things cold on that side. Without the timer, it won't complete the cycle. Turning it off and on again will make it work for a little while, but it will stop again without the defrost timer. You can find the defrost timer in the freezer back behind the plastic panel. Take everything out of the freezer get a screw driver and remove the panel to uncover the coils that look like baby bottle brushes. You can find the defrost timer by looking for a part that looks like a fat nickel. it has 2 - 3 wires on it. All you do is unplug your machine, cut those wires and take that part to buy a replacement timer. Most appliance stores have them. they are pretty standard. it should cost you about $ 22 american for the part. To replace it, just connect the wires and put wire caps on them and then plug the machine back in.

Posted on May 18, 2011

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