F4
Grundig
Heating Element Circuit Fault
Grundig oven shows F4 and does not heat in one or more modes.
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Safety Warning
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.
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Possible Causes
Open circuit in bake or grill element, Burned wiring to element, Faulty relay on control board, Overtemperature cut‑out tripped
How to Fix / Troubleshooting
Safety first: Disconnect the range from mains before accessing rear panels or elements. Elements can have sharp edges.
- Visual inspection: Look inside the oven for visible breaks or blisters on the bake or grill elements.
- Test elements: From the rear, disconnect element terminals and measure resistance with a multimeter. An open circuit indicates a failed element.
- Check wiring: Inspect for burned or loose connectors at the element terminals.
- Reset cut‑out (if accessible): Some models have a manual reset thermostat on the rear; press the small button if present, but only after the oven has cooled.
If elements and wiring are sound, the control board relay may be faulty and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Oven Heating Element (Bake or Grill)
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