F12
Viking
Upper/Lower Oven Communication Error
Viking double oven shows F12; one or both ovens may not operate.
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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
Loose harness between main control and sub-control, Failed sub-control board for upper or lower oven, Power supply imbalance between ovens, Faulty main EOC communication circuit
How to Fix / Troubleshooting
Safety: Turn off power at the breaker before accessing any control boards.
Steps:
- Remove the upper trim to access the control compartment. Identify the communication harness between the main EOC and the secondary oven control (if equipped).
- Unplug and re-seat all multi-pin connectors, ensuring they are fully engaged and free of corrosion.
- Inspect the harness for pinched or damaged wires, especially where it passes through metal brackets.
- If connections and wiring are good, determine which oven is non-functional and test that oven's sub-control board. Replace the faulty sub-control or main EOC as indicated by service diagnostics.
Note: Multi-board communication faults can be complex; professional diagnosis is often recommended.
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Repair Difficulty
Professional Required
5/5
Required Part
Oven Relay / Sub-Control Board
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