What F5 means
F5, F8 and FF usually mean the electronic oven control needs to be replaced.
Also shown as: F8, FF, depending on the model.
Likely causes
- Failed oven control board
Safe first checks
- Turn the oven off at the circuit breaker for a minute or two, then back on, to see if the code clears.
When to stop
Control replacement is for a trained technician. GE recommends leaving the oven off at the breaker until it's serviced.
Checked against: GE Appliances: Range & Wall Oven - Oven Error, Fault or Function Codes. Codes can differ by model and year, so confirm with your owner's manual.