GE Monogram error code · F3
GE Monogram Oven Code F3: Oven Temperature Sensor Open
GE Monogram F3 means the oven temperature sensor circuit reads open. Usually a failed RTD sensor or a broken/disconnected sensor harness.
GE Monogram oven code F3 means the oven temperature sensor circuit reads open (infinite resistance): the control has lost its temperature signal. The fix is normally a new oven temperature sensor (RTD), or repairing a broken or disconnected sensor harness.
What F3 indicates
F3 is an open-sensor fault. The oven uses an RTD temperature sensor whose resistance rises with temperature - about 1080 to 1090 ohms at room temperature. The control board reads that resistance to regulate heat. When the circuit goes open (infinite ohms), the control can no longer measure cavity temperature and posts F3, disabling heat.
Symptoms you may notice
- F3 on the display, often right at the start of preheat
- Oven will not heat or quits heating
- Temperature reading is missing or pinned low in service mode
- Code can appear cold, before any cooking
- Began after a self-clean cycle
What causes F3
RTD sensors fail open when the internal element breaks down after years of heat cycling, often after many self-clean cycles. The sensor's two-wire harness can also chafe against a sharp edge, burn, or pull loose at the connector behind the rear panel, breaking the circuit. Rodent damage to the harness is an occasional cause in homes with garage or basement installs.
Likely causes
- Failed oven temperature sensor reading open (most common)
- Broken or chafed sensor wire in the harness
- Sensor connector unplugged or corroded behind the rear panel
- Burned harness near the cavity from a prior self-clean
- Open sensor input on the control board (less common)
Parts typically replaced for F3
- Oven temperature sensor (RTD probe) — Replaced when it reads open instead of ~1080 ohms at room temperature
- Sensor wiring harness / connector — Repaired or replaced when a wire is broken, burned, or the plug is corroded
Owner-safe checks for F3
- Power-cycle the oven at the breaker once to rule out a momentary glitch
- Confirm the oven is genuinely not heating versus simply showing a stored code
- Note whether F3 appeared cold or only after heating for the technician
- Keep the oven off if it will not heat, to avoid repeated fault lockouts
When to call a technician
Confirming an open sensor versus a broken harness requires an ohmmeter at the sensor connector behind the rear panel, and replacing the RTD or repairing harness wiring near the hot cavity is technician work.
Frequently asked
GE Monogram F3: people also ask
What does F3 mean on a GE Monogram oven?
F3 means the oven temperature sensor circuit is open - the control has lost the resistance signal it uses to read cavity temperature. It is typically a failed RTD sensor or a broken sensor wire.
What is the difference between F3 and F4?
F3 is an open sensor circuit (infinite resistance, signal lost), while F4 is a shorted sensor circuit (resistance too low). Both indicate the temperature sensor or its wiring, but in opposite failure directions.
Can I fix the F3 sensor myself?
Confirming and replacing the sensor means accessing line-voltage wiring behind the rear panel and ohm-testing the RTD. We recommend a technician; the safe owner step is one power-cycle at the breaker.
Will a power reset clear F3?
A breaker reset clears the displayed code, but if the sensor is truly open the F3 returns as soon as the oven tries to heat. The sensor or harness must be repaired.
Is it safe to use the cooktop if the oven shows F3?
On a range, F3 affects the oven control only. The surface burners normally still work, but the oven itself should not be relied on until the sensor is replaced.
How long does an F3 sensor repair take?
Usually a single visit once the correct sensor is on hand. Our flat $89 diagnostic applies toward the repair, which carries a 365-day warranty. Call (650) 668-1554.
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