GE Monogram error code · F4
GE Monogram Oven Code F4: Oven Temperature Sensor Shorted
GE Monogram F4 means the oven temperature sensor reads shorted (resistance too low). Usually a failed RTD sensor or a pinched, shorted harness.
GE Monogram oven code F4 means the oven temperature sensor circuit is shorted - its resistance reads too low, so the control sees a false high or invalid temperature. The fix is usually a new oven temperature sensor (RTD) or repair of a pinched, shorted harness.
What F4 means
F4 is a shorted-sensor fault, the mirror image of F3. The RTD oven temperature sensor should read about 1080 ohms at room temperature and rise with heat. When the control sees resistance far below the valid range - effectively a short - it cannot trust the temperature reading and posts F4, shutting heat down to avoid an over-temperature condition.
Severity:Service recommended · Appliance:Range
Common causes
- Shorted oven temperature sensor reading below spec (most common)
- Sensor harness pinched or melted against the cavity, shorting the leads
- Moisture or corrosion bridging the sensor connector pins
- Insulation breakdown on the sensor wires after self-clean heat
- Shorted sensor input on the control board (less common)
Why F4 happens
Sensors short internally when the RTD element degrades, frequently after repeated self-clean cycles cook the probe. A harness wire pinched against the metal cavity or a section of melted insulation can short the two sensor leads together, as can moisture or a corroded connector bridging the contacts. The result is an artificially low resistance the control rejects.
What you'll typically see
- F4 displayed, sometimes alternating with erratic temperature behavior
- Oven will not heat or shuts off heat unexpectedly
- Temperature reading pinned high or invalid in service mode
- Code follows a recent self-clean cycle
- Oven was overheating or behaving oddly just before F4
Parts involved in F4
- Oven temperature sensor (RTD probe) — Replaced when resistance reads well below ~1080 ohms or shorted
- Sensor wiring harness / connector — Repaired when leads are pinched, melted, or bridged by corrosion
What you can check yourself
- Cut power at the breaker for a few minutes to clear a transient reading
- Avoid running another self-clean cycle, which can worsen a shorting sensor
- Note whether the oven was overheating before F4 appeared
- Leave the oven off if heat is unstable until it is inspected
When to book a pro
Distinguishing a shorted sensor from a pinched harness requires ohm-testing at the connector and inspecting the wiring against the hot cavity, and replacement involves the oven's line-voltage harness - technician work.
Have this code?
Send us the code and your model — flat $89 diagnostic, 365-day warranty.
Book a technicianFrequently asked
F4 FAQ
What does F4 mean on a GE Monogram oven?
F4 means the oven temperature sensor circuit is shorted - resistance reads too low, so the control gets an invalid temperature and shuts heat down. It is usually a failed RTD sensor or a pinched, shorted harness.
How is F4 different from F3?
F4 is a shorted sensor (resistance too low), while F3 is an open sensor (no signal at all). Both involve the same RTD probe and wiring but represent opposite failure modes.
Did self-clean cause my F4 code?
Often, yes. Self-clean drives the cavity extremely hot, and that heat can break down the sensor element or melt harness insulation enough to short the leads, which shows up as F4.
Can I reset the F4 code?
A breaker power-cycle clears the display, but a genuinely shorted sensor or harness will set F4 again on the next heat-up. The faulty component must be replaced.
Is it safe to keep cooking with F4?
No. With an untrusted temperature signal the oven cannot regulate heat safely, so leave it off until the sensor or wiring is repaired. Range surface burners are usually unaffected.
What does an F4 repair cost?
Most F4 repairs are a sensor or harness fix completed in one visit. We charge a flat $89 to diagnose, credit it toward the repair, and warranty the work for 365 days. Call (650) 668-1554.
Subzero Repair · Open 24/7 · 365-day warranty
Need GE Monogram repair in the Bay Area?
Call for urgent cooling or cooking failures, or book online for a service window across the Bay Area.