GE Oven F2 Error Code — What It Means
The F2 (or F20) error on your GE range or wall oven means the oven temperature has exceeded a preset threshold. GE defines this as a runaway over-temperature fault, typically triggered when the control senses the oven is heating beyond safe limits during cook or clean modes. This is a genuine overheating condition, not a keypad or cosmetic glitch. The oven will usually shut down or refuse to start until the fault is addressed.
Common Causes
- Failed oven temperature sensor The probe at the rear of the oven cavity sends resistance data to the control board, and when it drifts out of spec or fails open the board interprets runaway heat.
- Damaged or loose sensor wiring harness The wire run from the sensor to the control board can develop opens, shorts, or loose terminals that mimic an over-temperature signal.
- Failed electronic range control (ERC) or control board The board may misread a good sensor or generate false over-temp signals, especially if the code appears even when the oven is idle.
- Clogged vent or cooling issues Blocked exhaust paths or poor airflow can allow real overheating that triggers the code repeatedly even after component replacement.
- Transient electrical glitch Occasionally a power surge or brownout will latch the fault, though if it clears with a breaker reset but returns you have a persistent hardware problem.
Step-by-Step Fix
- Kill power at the circuit breaker or unplug the range before opening any panels or touching any wiring.
- Note when the code appears. If it only shows during cook or clean cycles the sensor or harness is more likely, while codes during idle or time-of-day mode point to the control board.
- Locate the oven temperature sensor at the rear wall inside the oven cavity, usually a metal probe threaded through the back panel, and inspect it for visible damage or a loose connector.
- Measure sensor resistance at room temperature with a multimeter set to ohms. The reading should be around 1,080 to 1,100 Ω at 70°F, though you should consult your model’s service sheet for the exact spec.
- Inspect the wiring harness from the sensor probe back to the control board for burned terminals, pinched insulation, or loose plugs.
- Replace the oven temperature sensor if resistance is out of range or the probe shows physical damage. If resistance is correct but wiring is faulty, repair or replace the harness.
- Replace the ERC or control board if both the sensor and harness test good, then restore power and verify the oven operates without the fault returning.
Parts Often Needed
| Part | Notes |
|---|---|
| Oven temperature sensor probe | Amazon | Match your GE model number; most sensors are universal within a series but verify the connector type and probe length. |
| Sensor wiring harness | Amazon | Order if terminals are burned or if the wire jacket is melted; some OEMs sell the sensor and harness as a single assembly. |
| Electronic range control (ERC) / oven control board | Amazon | Model-specific; bring your full model and serial number to make sure the correct board revision and connector layout. |
When to Call a Pro
If you are not comfortable working inside a 240-volt appliance, or if you have replaced the sensor and harness but the F2 code returns, call a qualified appliance technician. Diagnosing a faulty control board often requires live voltage checks and specialized test procedures. Persistent codes that reappear even after a board swap may indicate a short in the oven cavity wiring or a failing heating element, and those repairs require disassembly beyond typical homeowner scope.