Grundig oven shows F3 and will not start or maintain temperature.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Incorrect replacement sensor fitted, Sensor resistance out of calibration, Loose sensor connector at control board, Faulty electronic oven control

Safety first: Isolate the appliance from mains before removing the control panel or rear cover.

Check for recent repairs: If the sensor was recently replaced, verify that the correct Grundig part number was used.
Reseat connectors: Remove and reconnect the sensor plug at the control board to ensure a good contact.
Test sensor value: Measure resistance at room temperature and compare with manufacturer specifications. Replace if out of range.

If F3 persists with a known good sensor, the control board is likely faulty and should be replaced.

Hard 4/5

Electronic Oven Control Board

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