F21Serious
GE Oven/Range F21 Error Code
The bake or broil temperature sensor circuit is open, typically on dual-sensor models.
Common causes
- Faulty bake or broil sensor
- Loose connector
- Wiring break
How to fix it
- Inspect both bake and broil sensor connectors at the back.
- Measure sensor resistance; infinite reading indicates open sensor.
- Replace the faulty sensor.
⚠ When to call a pro: If both sensors check out, control board may be faulty.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.