What FD means
Either the probe or its receptacle in the oven may need to be replaced.
Likely causes
- Damaged probe
- Faulty probe receptacle
Safe first checks
- Unplug the probe from the oven wall and see whether the code clears with no probe in.
When to stop
If the code stays with the probe removed, schedule service.
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.