What F5 Means
F5 on Frigidaire sensor-cook microwaves means the humidity sensor read shorted for more than 5 seconds during cooking.
Common Causes of F5
- Shorted humidity sensor
- Wiring fault
- Control board fault
🔧 One Safe Check You Can Try
Unplug the microwave for a minute, then restore power and use timed cooking. If F5 returns on sensor programs, book service.
⚠ Why You Shouldn't Go Further Than That
- The sensor sits inside the cabinet, where the high-voltage capacitor can retain a dangerous charge.
- Damage caused during a repair attempt may not be covered by your warranty — check your warranty terms first.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.