ER20 Error on Teka Ceramic Hobs

How to understand the ER20 error on a Teka ceramic hob

The ER20 error on a Teka ceramic hob usually indicates an internal Touch Control fault related to the microcontroller (sometimes described as a flash error or “µC error”). When the control detects that something is off during its internal checks, the hob protects itself and may lock or switch off to prevent irregular operation.

This code often appears in fairly common situations:

• After a micro power cut, a voltage dip/surge, or a sudden reconnection of the circuit.
• After repeated breaker shut-offs or a “tight” electrical installation (poor contacts, loose terminals, etc.).
• If the control area has been exposed to steam, condensation, or recent cleaning and the control becomes unstable.

In short: ER20 usually does not point to a specific cooking zone or cookware, but to an internal control module issue that, if repeated, typically requires technical intervention.

What to do to clear ER20 and what to check so it doesn’t return

With ER20, the most useful approach is to follow an order that rules out external causes and confirms whether the fault is one-off or persistent. Start with the safe steps (no dismantling) and only move on if the error remains.

1. Cut power at the breaker panel and force a full reset
   • Switch off the circuit breaker for the hob (better than turning it off via the touch panel).
   • Wait 10 minutes so the electronics can fully discharge.
   • Restore power and test one zone at medium power for 1–2 minutes.

   If ER20 was a one-off lock-up after an electrical event, this step can sometimes clear it.

2. Make sure the touch panel is dry and clean
   • Dry the glass thoroughly, especially near the control area.
   • If you have just cleaned it, wait a while so there is no residual moisture.
   • Avoid directing steam from pots onto the controls (use the hood and ventilation).
3. Rule out electrical instability (a common reason it comes back)
   • Try turning the hob on without other high-load appliances running (oven, water heater, washing machine).
   • If you notice flickering lights or frequent breaker trips, it is worth having a professional check voltage and connections.
   • In older installations, loose connections in the junction box can cause intermittent errors.
4. Identify whether ER20 appears immediately or after a while
   • If it shows up instantly every time you restore power, it usually indicates a stable internal fault in the control.
   • If it appears randomly, the supply, moisture, or an intermittent contact may be influencing it.
5. When it’s best to stop and call a technician
   • ER20 returns even after the 10-minute power cut.
   • The hob switches off by itself or locks frequently.
   • You see segments flickering or the error cycles when you try to use it.

   In those cases, diagnosis typically points to the Touch Control (control module), and the fix is usually electronic repair or module replacement, depending on model and parts availability.

If ER20 was a one-off episode, it is often resolved with a full reset and by controlling moisture and the power supply. If the code repeats easily, the fastest route is usually to check the electrical installation and, if everything is correct, focus the repair on the control module to prevent recurring lock-outs.