Error code

Frigidaire F3

FRIGIDAIREF3
Error Code· Shown on the appliance's control panel.

What it means

Open oven temperature sensor (RTD).

Per Frigidaire Range/Oven Fault Codes

The RTD is open/shorted.

Per Frigidaire Range/Oven EOC Fault Code Guide, p2

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