Thermomix which no longer weighs, what to do?

The integrated scale of your Thermomix bug? Do you notice weighing deviations, irrational values ​​or an absent display? The problem of weighing on a Thermomix is ​​relatively recurrent. And in particular on the TM5 models sold until 2019 where many users all complain about the same failure: the Thermomix scale no longer weighs. So where does this problem come from? And what can you do to try to repair a scale that no longer works yourself, without calling the after-sales service? Find out the answers in this article.

Why does your Thermomix balance no longer work properly?

Possible causes

Several factors can explain that the balance of your Thermomix no longer weighs correctly or at all :

In most cases, the problem is with sensors. They can lose the connection with their connector when unhooking but also be defective and no longer work. It could also be a problem connecting to the motherboard (or control card). Here too the problem can come from an unhooking of the wires connected between the motherboard and the sensors or from defective elementary components. These two factors will require the Thermomix to be disassembled as the components are in the engine block.

Finally, it is possible that the balance of your Thermomix no longer works because of a poor general condition of the device. The advantage here is that checking and repairing does not require disassembly of the robot. This is why we will first carry out these checks:

Check the general condition of the Thermomix

Thermomix scale that no longer works, what to do?

First of all, know that the balance of the device is extremely sensitive and therefore fragile. At the slightest destabilization, the weighing can be distorted. Yes the scale of your Thermomix no longer weighs correctly, you will then have to check certain points:

1 - Check the condition of the Thermomix feet. If you find that the feet are dirty, clean them by removing any crumbs and debris. Then use a contact cleaning spray for electrical and electronic components. We recommend the 3 in 1 bomb from Norauto. If you notice that the feet are not at the same height and / or that one of them is damaged, then it will probably be necessary to replace the defective foot to regain balance precision.

2 - Check that the Thermomix is ​​not not placed on its power cable because that can panic the scales. Also make sure that the cable is not too tight.

3 - If the Thermomix scale does not weigh correctly, check that it is positioned on a uniform, solid, stable and vibration-free work surface. For example, a tiled worktop is not recommended because small irregularities between the tiles can cause the scale to fail to measure.

Note: Be careful not to create an imbalance in the balance by tapping on the edge of the bowl (by breaking eggs for example). By force, this can destabilize the scale which is extremely sensitive. In addition, be careful when moving the Thermomix. Move it by lifting it and not by pulling it because this can damage the feet and cause an imbalance of the Thermomix and the scale. 

If these few checks did not give anything, your Thermomix probably no longer weighs because of a connection fault at the level of the sensors of the balance. In this case, go to the next step in our guide to try to solve the problem on your own, without going through the after-sales service.

What to do if the scale of your Thermomix no longer weighs?

Why are the sensors defective?

As previously stated, the Thermomix scale certainly no longer weighs because the sensors are defective. This does not mean that they are necessarily dead. Most of the time, the problem comes from one or more connectors of sensors that simply disconnected due to vibrations repeated times of the Thermomix.

This is because connectors are extremely small pins and very sensitive to vibrations. And even if you don't always feel it, when you use the Thermomix, the device constantly emits more or less powerful vibrations. Over time, this can alter the contact of these connectors. The sensors lose their connection and are therefore no longer correctly supplied with electricity. This poor contact of the connectors leads to too low or no current and therefore the scale starts to bug or no longer work.

It is also possible that the connectors are dirty and that they are faulty. nettoyer. However, this is more rare. Reconnect the connectors can often be used to recover a working scale.

This weighing problem appears in particular on Thermomix TM5 models.

How to repair the Thermomix balance connectors?

Thermomix which no longer weighs what to do?
Caution : - if your Thermomix which no longer weighs is still under warranty, immediately contact the Vorwerk after-sales service, without dismantling. Indeed, this operation makes you lose your rights to the guarantee. If the operation does not work, then you will have to pay for the repair in full. - If your Thermomix is ​​no longer under warranty, a repair package will be offered to you by Vorwerk after-sales service if you have not disassembled it. If you dismantle your device and the operation does not work, you will pay the full price for the repair. - Risk of electric shock. Always disconnect the electrical current before disassembling the device. Preferably wear rubber gloves. - Risk of damage to the device. If you are not competent to carry out the manipulations, call a professional. 

For repair the connectors of the Thermomix balance that no longer works, you'll have to disconnect then reconnect the connectors of the balance sensors and the motherboard and if necessary clean them. To do this, start by disassembling the Thermomix by proceeding in the same way (procedure for a model TM5:

  1. Switch off the Thermomix and unplug the appliance electrically. Wait 1 minute for all the electricity to be emptied from the circuit.
  2. Remove the gray cover on the back of the device by unclipping it
  3. Unscrew the two long screws that are on each handle. Remove the handle.
  4. Unscrew the 4 screws at the back (2 on each side) and the 3 screws at the bottom
  5. Unclip the sealing disc located at the level of the insertion of the knife on the center of the engine block
  6. Remove the front button by unclipping it
  7. Remove the knob fixing ring (white disc) by turning it 1/4 turn counterclockwise
  8. Remove the last screw from the back and center of the device
  9. Open the Thermomix in half. Proceed gently.

Then disconnect then reconnect the sensor connectors. If they are dirty, clean them. To do this, proceed as follows:

  1. Remove the connector from the motherboard which is on the front panel and if necessary clean it using the "contact cleaning spray" for electronic devices. Be careful to let the product dry for a few minutes before reassembling the parts.
  2. Unclip the screen connector
  3. Remove the engine cover and remove the black connector
  4. Still using the bomb, clean the black connector
  5. Unclip the motherboard using the tabs provided for this purpose (which is located behind the gray cover of the Thermomix when it is fitted).
  6. On the right side of this map, there are the 3 balance connectors (those with the finest threads). To find a balance in working order, it is often enough simply to remove then gently put each connector back in place. You can once again clean them with a suitable spray. Be careful that the connectors are correctly replaced. If in doubt, remove and then put back again.

Then be sure to put everything back in its place and reconnect everything. If you want a video tutorial to accompany you, the next video proven to repair the Thermomix T5 scale that no longer works :

Contact Vorwerk after-sales service

If your Thermomix no longer weighs correctly, even after this manipulation, then the problem may be with the motherboard or sensor that is totally HS and which therefore no longer receives current despite the fact that the contacts are good.

In this case, you will unfortunately have to call on the Vorwerk after-sales service by contacting them on 02 51 85 47 47 or by making a complaint by email to serviceclient@vorwerk.fr. You will then be put in touch with a technician who can carry out a more precise diagnosis and you will find a personalized solution. Note that he will offer you a repair package (if you have not dismantled the Thermomix, as indicated above) or a full price repair. Thereafter, you will have an additional one-year warranty.

You now know how to try to repair the scale of your Thermomix which no longer works. Again, be careful when disassembling the device to avoid further damage to it. Good luck !

Read also: Thermomix that no longer lights, what to do?

13 thoughts on “Thermomix that no longer weighs, what to do?”

    • Hello
      If you have tried the manipulations presented in the article, we can only advise you to contact the Thermomix after-sales service who can give you a personalized solution. We are simply an independent advice blog, so we have no connection to after-sales service. Good luck

      Reply
  1. Super awesome, followed the procedure to the letter, and the weighing is operational again. Thank you very much for the tutorial.

    Reply
  2. Just called…. 170 euros… for a defect noted on the TM5 before 2019. A manufacturing error. That's where Thermomix's reputation goes as far as I'm concerned.

    Reply
  3. At the top, we followed the procedure to the letter (which is very well explained) and the weighing works again 🥳 You just have to be careful to re-clip the button.
    And to think that 2 years ago I paid to have the same problem repaired… 😡
    In any case, a nice saving for this time: a big THANK YOU!!!!!

    Reply

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