F5
BlueStar Control Board Relay or Internal Logic Fault

Display shows F5 and oven functions are disabled or intermittent.

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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 relay on EOC, Internal control board logic error, Power surge damage to control board

How to Fix / Troubleshooting

Safety first: Disconnect power at the breaker. Do not attempt to operate the oven with a suspected control board fault.

Steps to try:

  • Power cycle: Turn off power for 10–15 minutes to fully discharge the control. Restore power and check if F5 returns.
  • Inspect board: Access the EOC behind the control panel. Look for burnt spots, cracked solder joints, or swollen components.
  • Check wiring: Verify that all harness connectors to the EOC are fully seated and not heat-damaged.
  • Replace EOC: If F5 persists and no external wiring issues are found, replace the electronic oven control with a BlueStar-compatible part. Transfer each wire one at a time from old to new board.

When to stop: If you see extensive heat damage or are unsure about wiring, contact a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Electronic Oven Control (EOC) Board
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