F15
Bauknecht
Triac / Solid State Relay Fault for Heating Circuits
Oven shows F15, fan runs but no heat in any mode, or oven shuts down shortly after start.
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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
Shorted or open triac on control board, Overheated solid state relay, PCB track damage around power devices, Incorrect mains supply causing overcurrent
How to Fix / Troubleshooting
Safety first: Isolate the oven from mains. Power components on the board can be hazardous.
- Visual inspection: Access the main control board and inspect the triacs or solid state relays controlling the heating elements. Look for cracks, burn marks, or discolored PCB around them.
- Check for obvious shorts: If a triac has exploded or the board is charred, the entire control board must be replaced.
- Functional test (advanced): With the oven reassembled and under controlled conditions, a technician can measure whether voltage is being switched correctly to the elements. This is not recommended for untrained users.
- Replacement: Replace the main control board if F15 persists and no external wiring or element faults are found.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Electronic Control Board (Power Triac Section)
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