F3 — / F4 — Oven Sensor Needs Replacement
F3 and F4 both mean the oven sensor needs to be replaced — the control cannot get a valid reading from the oven temperature sensor circuit.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Moderate
- Typical cost
- $15-30
- Verified against
- products.geappliances.com ↗
The fix
Oven temperature sensor (RTD probe)
Open oven temperature sensor circuit
Diagnose first: Indicates open circuit in sensor or its harness. Test sensor for ~1080 ohms at room temp; check harness continuity from sensor to control board.
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How to fix it
- Unplug the oven.
- Inspect the sensor harness connector at the rear for looseness, corrosion, or damage.
- If the connector is good, replace the oven temperature sensor — GE's guidance is that the sensor needs replacement for this code.
Why it happens
Typical signs: Oven will not heat or heats wrong · F3 or F4 on the display
- Failed oven sensor (RTD) GE's guidance is that the oven sensor needs to be replaced when this code appears.
- Damaged sensor wiring/connector A burnt or loose connector behind the oven.
Related repair guides
More GE oven codes
Frequently asked questions
What does the F3 code mean on a GE oven?
F3 and F4 both mean the oven sensor needs to be replaced — the control cannot get a valid reading from the oven temperature sensor circuit.
What causes the F3 code on a GE oven?
Failed oven sensor (RTD): GE's guidance is that the oven sensor needs to be replaced when this code appears. Damaged sensor wiring/connector: A burnt or loose connector behind the oven.
Is it safe to keep using a GE oven with a F3 error?
Yes, with caution. This is rated a moderate-severity fault.
How do I fix F3 on a GE oven?
Unplug the oven. Inspect the sensor harness connector at the rear for looseness, corrosion, or damage. If the connector is good, replace the oven temperature sensor — GE's guidance is that the sensor needs replacement for this code.
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: products.geappliances.com.