Step 01
Signs
• Oven will not heat or maintains incorrect temperature
• Error code F20 displays on the control panel
• Oven may shut off during cooking cycles
• Unable to preheat the oven
• Cooking results are inconsistent or undercooked
• Control panel may become unresponsive
• Audible beeping with the error code display
Step 02
Possible Causes
• Faulty oven temperature sensor (RTD sensor/thermistor) located inside the oven cavity
• Loose or disconnected wiring harness connected to the temperature sensor
• Damaged or corroded sensor connector pins
• Wire insulation damage caused by heat exposure or contact with oven interior
• Control board malfunction preventing proper sensor signal reading
• Food debris or grease buildup around the sensor probe
• Sensor probe bent or physically damaged from contact with racks or cookware
• Voltage supply issues from 240V circuit breaker affecting sensor power
Step 03
Safety Checks You Can Do
• Verify the circuit breaker powering the oven (typically 240V double-pole breaker) is in the ON position and has not tripped
• Turn off the oven's power at the circuit breaker for 60 seconds, then turn back on to reset the appliance
• Allow the oven to cool completely for 30 minutes before attempting to use it again
• Inspect the oven interior for any visible obstructions, food debris, or grease buildup, especially around the temperature sensor location (typically on the interior right or left wall)
• Visually check that the oven door closes completely and the door latch engages properly
• Review the control panel display settings to ensure the oven is set to the correct cooking mode
• If you can safely access the sensor area inside the oven cavity, gently clean around the sensor probe with a soft, dry cloth to remove any grease or debris
• Attempt to run a preheat cycle to see if the error code clears
• Check all visible wiring connections at the back of the oven control panel for any loose or disconnected plugs
• Document when the error appears (during preheat, cooking, or specific modes) to provide to a service technician if the issue persists