GE Oven F3 Error Code: Oven Temperature Sensor Open (Meaning, Causes, Fixes)
What the code means
GE's fault-code chart for ranges and wall ovens says F3 "usually means that the oven sensor needs to be replaced." GE's technical service guide for its 27-inch built-in wall ovens defines F3 more precisely as an open oven sensor: the control reads the sensor's resistance, and a reading above about 3,000 ohms (an open or broken circuit) triggers F3. The closely related F4 is the opposite fault, a shorted sensor reading under about 950 ohms, and GE's chart also says F4 usually means the sensor needs replacing. A healthy GE oven sensor reads roughly 1,080 to 1,100 ohms at room temperature and rises about 2 ohms per degree as the oven heats (GE's Profile PB975 service manual lists about 1,654 ohms at 350°F). Without a sensor reading the control can't regulate temperature, so it shuts off oven heating as a precaution.
Likely causes
- A failed oven temperature sensor (the probe on the back wall of the oven) that has gone open inside
- A loose, burned or corroded connection at the sensor's plug behind the back wall
- A damaged or pinched sensor wire between the sensor and the electronic oven control, sometimes after the range was pushed back against the wall
- Heat stress on the sensor or its connector, which often shows up after a self-clean cycle
- Less often, a fault in the electronic oven control's sensor input, if the sensor and wiring test good
Safe DIY checks
Unplug the appliance or switch off its breaker before opening panels.
- Touch CLEAR/OFF. GE's owner's manuals say that when an F-code flashes, you should touch CLEAR/OFF, let the oven cool for an hour, and try again; if the code repeats, disconnect power and call for service.
- Do a power reset: switch off the oven's circuit breaker (or unplug a freestanding range) for a few minutes, then restore power.
- With the oven cool, look at the sensor probe on the oven's back wall. If it is bent, touching the oven wall, or visibly damaged, it needs replacing.
- If F3 keeps coming back, stop using the oven and book service or order a sensor. GE's chart says the sensor usually needs to be replaced.
- Write down your model number (on a label around the oven door frame or storage drawer) before ordering a sensor or booking service; sensors are model-specific.
🛠 When to call a pro
- With power off, disconnecting the sensor harness at the control and measuring the sensor's resistance: GE's service guide expects about 1,080 ohms at room temperature with about 2 ohms per degree of change. A reading over about 3,000 ohms (open) confirms F3.
- Measuring at the sensor itself as well as at the control end, to tell a bad sensor from a damaged harness or connector.
- Checking the sensor plug and harness terminals for heat damage, corrosion or a loose pin.
- Replacing the electronic oven control only if the sensor and wiring both test good and F3 returns.
Parts that commonly fix it
Always match the part number to your exact model.
Oven temperature sensor (exact OEM part for your model)
The most common fix for F3. Match your model number.
Search eBay →Digital multimeter
For checking the sensor's resistance (about 1,100 ohms at room temperature).
Search eBay →Electronic oven control board (exact OEM part for your model)
Only if the sensor and wiring test good and F3 keeps returning.
Search eBay →Sources
- GE Appliances: Range & Wall Oven - Oven Error, Fault or Function Codes (F3 and F4: oven sensor usually needs to be replaced)
- GE Technical Service Guide 31-9084, 27-in. built-in wall ovens (F3 open oven sensor over 3,000 ohms, F4 shorted under 950 ohms, about 1,080 ohms at room temperature, 2 ohms per degree)
- GE Profile PB975 service manual, component test (oven sensor about 1,100 ohms at room temperature, 1,654 ohms at 350°F)
- GE range owner's manual: F-code flashing, touch CLEAR/OFF, let oven cool one hour, if code repeats disconnect power and call for service
Last reviewed 2026-10-23. Always confirm against the manual for your exact model number.