F02 Error on Teka Vitroceramic Hobs

How to identify what F02 is warning about on a Teka vitroceramic hob

The F02 error on a Teka vitroceramic hob usually appears when the hob detects overvoltage, meaning the incoming voltage is above the safe range. In that situation, the electronics activate a protection mode and block operation to prevent damage to the control unit and the power stage.

What you will notice when F02 appears

• The message shows when you switch it on or right after power returns
• The hob will not start cooking or stops immediately
• The error may repeat if the voltage remains out of range

Why it happens more often than it seems

F02 is normally not related to cookware or a specific zone. Instead, it is usually linked to the electrical environment: spikes after outages, grid fluctuations, or poor connections (for example, a terminal that is not properly tightened). If the installation is borderline or unstable, the control may detect high values and protect itself even if other appliances appear to work normally.

In short, F02 is a warning that the supply is outside safe conditions, so it is best to address the cause rather than repeatedly trying to switch it on.

What to do to clear F02 and what to check so it does not return

To clear F02, it is best to follow a short, logical sequence. First, recover the system with a proper reset. Then, check whether it was a one-off event or a sustained overvoltage. From there, you can decide whether basic checks are enough or professional help is needed.

1. Perform a full electrical reset at the panel
   • Switch off the hob’s circuit breaker
   • Wait 3–5 minutes to discharge the control electronics
   • Restore power and check whether F02 disappears

   If the warning came from a brief spike after an outage, this step is often enough.

2. Check whether it was an isolated episode or if it keeps coming back
   • If it disappears and does not return, it was most likely a momentary spike
   • If it returns every time you power on, it points to voltage out of range or a stable poor contact
3. Test with the house “quiet” to reduce variables
   • During testing, avoid running high-load appliances at the same time (oven, water heater, washing machine, dryer)
   • If possible, test at a time of lower electrical demand
   • If you notice lights flickering or unusual behaviour, note it down as a strong clue

   However, if F02 appears immediately even with minimal load, attention should shift to the supply and connections.

4. When it makes sense to call an electrician
   • F02 repeats and you suspect an unstable supply or frequent spikes
   • There are other electrical symptoms at home (flickering, noticeable dips/spikes)
   • The hob is connected to an older terminal box or you have doubts about tightness

   At this point, the usual checks are actual voltage, the condition of the neutral, and terminal tightness. A poor contact can cause abnormal readings and trigger protections.

5. When to move on to an appliance service technician
   • The supply is stable and verified, but F02 still appears
   • The fault does not depend on outages or load peaks
   • The error persists after a reset and with the installation confirmed

   Finally, if the supply is correct and the code continues, there may be an issue in the internal measuring circuit or electronics, and that requires module diagnosis.

If F02 was caused by a brief spike, a full reset usually clears it. If it repeats frequently, the priority is checking voltage and connections so the hob stops entering protection due to an out-of-range supply