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Hi
I have a NEFF T51T55X2 induction hob which is about 3.5 years old, and has the capactive touch buttons for power etc, but uses a detechable magnetic central control knob to select the required hob and set the temperature.
Recently when using the hob it has made random beeps and then started to display LEDs at random and turning off any hobs that were running. However, if I apply a little bit pressure near where the control knob is, it will start working ok; remove the pressure and it goes crazy again. Occasionally it may start beeping and flashing “E” for each hob along with “EE” on the timer LED, which according to the manual means there is water on the control panel (the panel is dry), and usually with a quick wipe and a dry it seems to go away. Now, these faults only seem to present when the hob has been in use for 5-10 mins.
I have opened up the hob and checked that everything is seated properly, which did seem to make a slight improvement, but alas the fault does reappear. I noticed on the control PCB, where the central control connects, there is a little PCB which has a spring underneath attached by a small ribbon cable, which I guess is designed to be pulled up to the glass when the magnetic control knob is attached. Checked the foam contacts for the capactive buttons and all look ok, however noticed some are stuck to the glass and others to the PCB, so not sure which is correct, and whether this is the problem; I have a feeling they should be attached to the PCB.
It appears that there is some disconnect between the glass control panel and the control PCB underneath, as appling pressure seems to clear the fault, and I assume that the “E” errors I see regarding water on the control panel are related, as I guess it uses the capactive buttons to form some kind of circuit if there is water on the panel.
As it seems that this must be something as simple as a bad contact with the control PCB and glass top, I am reluctant to pay for NEFF to come out, so wondered if anyone had any previous experience with this model, manufacturer or just general induction hob with capactive buttons experience on what to check, adjust, etc.
have you pulled the cables off between the boards and replaced them as you can get dodgy connections
beware as inducion hobs have capacitors that hold 300 volts and can still give a bad shock after switch off
Dave
electrofix wrote:have you pulled the cables off between the boards and replaced them as you can get dodgy connections
beware as inducion hobs have capacitors that hold 300 volts and can still give a bad shock after switch off
Dave
I removed and reseated a small ribbon cable between the boards, which is just below the control PCB, and did a continuity check on it while giving it a few twists in case it was a small break, but it seemed to be ok. With regards to capacitors, I kept anything I was doing under the plates on or near the power boards to a minimum, and just tweaked any connections with insulated tools; I have been caught out too many times before when I used to fix computer screens and power supplies by touching the wrong parts 🙂
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