Frigidaire Microwave F3 error code

A key on the key panel has been shorted for over 60 seconds. The control thinks a button is being held down.

Also shown as: F3

Last updated: October 6, 2026

Quick answer: Frigidaire microwave error code F3: shorted keypad key. The most common cause is keypad key physically stuck or held down. Try this first — press and clean every key. If that does not clear it, unplug for 5 minutes. If the code persists, call a qualified technician.

What causes the F3 error?

  • Keypad key physically stuck or held down
  • Debris or dried food under the membrane keypad
  • Worn membrane keypad with a shorted key
  • Failing keypad panel
  • Moisture trapped behind the control panel

How to fix Frigidaire F3 — step by step

Work through these in order, from simplest and safest first. Stop as soon as the code clears.

  1. Press and clean every key
    Unplug the microwave. Press every keypad button firmly one by one, feeling for a key that sticks or feels different. Wipe the panel clean with a damp (not wet) cloth to remove sticky residue. Plug it back in and test.
  2. Unplug for 5 minutes
    Unplug the microwave for 5 minutes, then plug it back in. This clears a false shorted-key reading from a glitch. If F3 returns without anyone touching the panel, the short is real.
  3. Let the panel dry out
    If F3 appeared after steam or splashing near the panel, let the microwave sit unplugged for several hours so moisture behind the membrane can dry out.
  4. Call a technician for keypad service
    A persistent F3 means the keypad panel or its connection needs professional service. On many models the keypad and control come as one assembly.
    Safety warning: Never open the microwave cabinet to reach the keypad wiring. High-voltage parts sit just behind the panel.

When to call a technician

Stop and call a qualified technician if any of these apply:
  • F3 returns with no one touching the keypad
  • A key is visibly damaged or sunken
  • The keypad panel needs replacement
  • The microwave starts beeping or acting on its own

Frequently asked questions

F3 vs F5: what is the difference?

F3 means a keypad key is shorted (stuck). F5 means the humidity sensor shorted during cooking. F3 is the keypad; F5 is the sensor.

Can I trigger F3 on purpose to test?

Yes, as a test: holding any key for over 60 seconds makes the control display F3. That is how you can confirm the code is about the keypad.

Will pressing the keys fix F3?

Pressing a mechanically stuck key can free it. If the short is electrical, the code returns and the panel needs service.

Sources

Every meaning and fix above was checked against official manufacturer documentation:

FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.

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