Error code

GE F3

GEF3
Error Code· Shown on the appliance's control panel.

What it means

Key panel (touch pad) shorted.

Per GE Microwave Fault Codes

Touch Pad Shorted.

Per GE Fault Codes (PartSelect)

Not affiliated with GE. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.