Frigidaire Oven F3 / F20 error code
The range's control boards stopped communicating with each other — the main oven control can't exchange data with the surface-element or secondary board. The range typically won't operate until communication is restored.
Also shown as: F20
Last updated: September 30, 2026
What causes the F3 / F20 error?
- Loose wiring harness between boards
- Failed secondary control board
- Failed main oven control
- Power surge
How to fix Frigidaire F3 / F20 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Reset the range
Disconnect power for up to 30 seconds by unplugging the unit or flipping the circuit breaker off and back on.
When to call a technician
- Code returns after reset
- Range is partially or fully unresponsive
- You recently had a power surge
Frequently asked questions
Can I still use the cooktop with F3/F20?
Usually not reliably — the fault affects the control system that manages the range. Reset first, then schedule service if it persists.
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.