Frigidaire Microwave Error Code F5 — Relay Board Failure
What this means
The F5 error code on Frigidaire microwaves indicates the relay board (or main control board on single-board models) has failed. The relay board controls power distribution to the magnetron, fan motor, turntable, and other components. When it fails, the microwave cannot operate. This is typically caused by power surges, aging components, or a manufacturing defect in the relay circuitry.
Step-by-step fix
3 stepsReset the microwave
Unplug the microwave for 10 minutes to allow complete discharge of all board components. Plug it back in and check if the error clears.
Power surges can sometimes cause temporary board errors — a 10-minute reset gives the best chance of clearing it.
Check the power source
Ensure the microwave is plugged into a properly grounded outlet. If possible, try a different outlet on a different circuit to rule out a power quality issue.
Consider a surge protector for the microwave going forward — they're inexpensive insurance against board-damaging power surges.
Evaluate repair vs. replacement
If the error persists, the relay board needs replacement. Get the part cost for your model and add labor. Compare the total to the cost of a new microwave. For units over 7 years old, replacement is often the better investment.
Frigidaire/Electrolux control boards typically cost $80–$180. Factor in $100–$150 for professional labor.
When to call a professional
Relay board replacement requires working inside the microwave near the high-voltage capacitor and magnetron. This repair must be done by a qualified technician.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Relay / Main Control Board
Part #5304491624 · $80–$180
Required if error persists after reset
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