F8
Dacor Relay board or power relay failure

Dacor oven shows F8 and may not heat properly or at all

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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

Failed bake or broil relay on relay board, Burned solder joints on relay board, Overheated relay contacts from high current, Faulty ERC relay drive output

How to Fix / Troubleshooting

Safety first: Turn OFF the breaker and verify power is removed with a non-contact tester before accessing internal components. High voltage is present on the relay board.

  • Access relay board: Remove the rear panel or lower front panel (model dependent) to locate the relay board that switches power to the heating elements.
  • Visual inspection: Look for burned areas, cracked solder joints, or melted relay housings. Any visible damage indicates the board should be replaced.
  • Check element continuity: Before replacing the board, test the bake and broil elements for shorts or opens. A shorted element can damage relays.
  • Replace relay board: Label and disconnect all wires from the old board, transfer them to the new board one at a time, and secure the board in place.
  • Test operation: Restore power and run a bake cycle. Confirm that the oven heats and that F8 does not return.

If the relay board appears normal but F8 persists, the ERC may not be driving the relays correctly and may need replacement.

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Repair Difficulty

Hard 4/5

Required Part

Oven Relay Board
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