The ge oven f3 f4 code is one of the most frequently reported problem pairs on GE electronic wall ovens and ranges, and both codes trace back to a single component: the oven temperature sensor, sometimes called an RTD probe, mounted at the back of the oven cavity. GE’s own problem documentation lists F3 and F4 together because they represent the same failure point read in two different electrical directions – one an open circuit, the other a short.
How the temperature sensor works
The sensor is a resistance-based probe that changes its electrical resistance predictably as cavity temperature changes, and the control board reads that resistance to know how hot the oven actually is, independent of what the heating elements are doing. If the sensor’s resistance reading falls outside the expected range in either direction, the control cannot trust the temperature data and raises a problem rather than continuing to bake blind.
What F3 means
F3 generally indicates an open circuit – the sensor’s wiring or the probe itself has broken continuity, so the control reads an unrealistically high resistance value, as if the oven were far colder than it could possibly be.
What F4 means
F4 generally indicates a short – the sensor or its wiring is reading an unrealistically low resistance, as if the oven were impossibly hot, even from a cold start.
What causes sensor failure
- Age-related wear on the sensor probe itself after years of heating and cooling cycles
- A damaged or pinched sensor wire, sometimes from cleaning around the back of the cavity
- A loose connector at either end of the sensor harness
- Physical damage to the probe from contact with bakeware or a self-clean cycle
What you will notice besides the code
Before the error code ever appears, a drifting sensor commonly shows up as uneven or inaccurate baking – dishes finishing too fast, too slow, or unevenly browned – since the sensor was already feeding the control slightly wrong data before it drifted far enough to trigger F3 or F4 outright.
When to call a technician
Confirming a sensor failure is straightforward with a multimeter check of the probe’s resistance at room temperature against the manufacturer’s expected value, and our oven repair technicians carry out that test directly rather than replacing the sensor on assumption. If your oven is also showing signs of not heating at all, our oven not heating guide covers the broader set of causes beyond the sensor alone.
Replacement considerations
The temperature sensor is a relatively accessible component on most GE wall ovens, mounted with two screws at the rear of the cavity and connected by a simple wire harness, which keeps this repair on the more straightforward end of oven service compared with control-board-level problems. See the broader F-codes overview for how F3 and F4 relate to other problem families.
Quick summary
A ge oven f3 f4 code nearly always points to the temperature sensor or its wiring, and confirming the problem with a resistance test before ordering a part avoids paying for a component that was never the problem.
Why F3 and F4 are grouped together
GE groups the ge oven f3 f4 code pair in its own problem documentation precisely because both readings come from one physical sensor circuit, just interpreted in opposite electrical directions. That grouping is useful in practice: whichever of the two your display shows, the diagnostic path – test the probe’s resistance, inspect its wiring, check the harness connector – is identical, so there is no need to treat the ge oven f3 f4 code pair as separate problems requiring separate troubleshooting.
Our experienced, independent technicians test the sensor circuit directly and use OEM or high-quality replacement parts for the fix. Schedule a diagnostic visit at /schedule/. For general product information, see geappliances.com.
