!!
critical Amzchef
Error Code F3 / F4
Temperature sensor of the induction coil short circuit or open circuit.
? What Causes This
Sensor malfunction due to damage or failure in connection.
✓ How to Fix It
Contact a qualified service center immediately for repair.
Source: page 17 of the official manual
From the manual
This error code appears in:
Amzchef SK 20cb16t Single Induction Cooker