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| Repair of Bosch induction cooktop touch controls |
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| francesco.comi:
First I would like to thank you, Otso and everybody else who helped identify and solve this issue. I have the same issue with a Siemens cooking top with very similar controls, with a recently replaced glass. After the glass replacement new buttons started to stop working. I'm planning to do the same fix, but I have a couple of questions of how to exactly do the fix. If I understand correctly I need a small wire (I have plenty) and I need to create a loop, put it on top of the touch button and solder it on one of the ends of the nearby resistor. My questions: - should I solder only one end of the loop? - should the loop cross (I meed the two ends of the loop should touch at the end of the loop)? Maybe I'm missing how the fix works... I'm very practical with soldering, but never worked on this kind of touch controls. Thank you for any help. |
| francesco.comi:
I finally tried e succeded! I would like to thank everyone who helped finding a solution to this issue!!! I did the thin wire solution, it worked perfectly at the first try on every button I did it! I used simple scotch tape to keep the wire attached to the button and isolated. For some buttons I soldered near the resistor, on some other buttons it was too difficult to reach and used the via in the bottom. (Pictures attached for the first two I did) For anybody with this issue, go ahead and do it, it is easier that what is seems! Thank you! |
| Otso:
The buttons have been working for me since I fixed them. However, after some time the cooking top has occasionally started beeping, similar to when you leave something on the top of the buttons. I wonder if they got oversensitive. When this happens, the only fix I have found is to power cycle the cooking top (by switching off the fuses and back). There are slight variations between how it behaves. Some, but not all, of the problems seem to occur when it has been hot for a long time. |
| Fron:
Hello all induction repairers... I read with lots of interest the communication about other Bosch induction cook plate troubles, so I ask your opinion about the following: My daughter's Bosch induction cooktop (PIA645Q16E, 10 years old) has different keys, I think infra red sender/receivers, and no problem there... But suddenly it made blew the fuse (house, 3-phase fuse of the cooking stove) and does not work anymore, even with fuse re-activated. I opened the cook-plate and found out 2 of the four IGTB's are defect. No visable damages but I measured them with an OHMmeter and the 2 left ones measure no values, the 2 right ones do.. I consider also exchanging the rectifier as I read this might have an influence too... If someone can give me additional advice, please do so, as I have absolute no experience in this matter, only general 'mechanics' and all-round technical, mainly cars and medical equipment... |
| Whales:
(Take this with a grain of salt, I have not worked on induction cooktops) The IGBTs blowing might be a symptom, not a cause. Other components may have worn out, perhaps there is a short in the coils or the capacitors have gone bad. You might (?) be able to measure some of these problems with a multimeter. |
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