GE Oven F3 Error Code: Causes & Fixes

If your GE oven shuts off mid-bake and flashes F3 (sometimes stored as F3 in the control's memory), the problem is almost always the oven temperature sensor — the thin metal probe that tells the control board how hot the oven is. It's one of the more diagnosable GE error codes, and the sensor itself is an inexpensive part. This guide explains what F3 means, how to test the sensor, the likely fixes, costs, and when to call a professional.

What does the GE F3 error code mean?

F3 is an oven temperature sensor fault. Your GE oven uses a sensor called an RTD (resistance temperature detector) — a probe mounted inside the oven cavity (usually on the upper rear wall). Its electrical resistance changes predictably with temperature, and the control board (the ERC, or electronic range control) reads that resistance to regulate the heat.

When the resistance the board reads is outside the expected range — too high (an open circuit) or too low (a short) — the board can't trust the temperature reading, so it shuts down and displays F3. In plain terms: the oven's thermometer is giving the brain a nonsense reading, so the oven stops for safety.

💡 Good to know: A healthy GE oven sensor reads about 1,080–1,100 ohms at room temperature (around 75°F). That single measurement is the key diagnostic for an F3 code — more on testing below. Related codes: F0/F1 point to the keypad/control, and F2 means the oven overheated.

Most common causes of the F3 error

Step-by-step fixes (start here)

1. Power-cycle the oven

A momentary glitch can trigger F3. Turn off the oven's circuit breaker for at least 5 minutes, then turn it back on. If the code was a fluke, it won't return. (Note: many GE ovens store F3 in memory — you can recall stored codes on some models by pressing certain key combinations, and clear them per your manual.)

2. Make sure the sensor isn't touching the oven wall

The RTD probe should sit slightly away from the interior wall. If it has been bent so it contacts the metal, it can read incorrectly. Open the oven (cool), and gently make sure the probe is positioned freely, not pressed against the wall.

⚠️ Safety first: Always switch off power at the circuit breaker before testing or replacing the sensor — an oven runs on 240V and can deliver a fatal shock. Let the oven cool completely before reaching inside.

3. Test the oven temperature sensor

This is the definitive diagnostic for F3. You'll need a multimeter.

1. Turn off power at the breaker and let the oven cool.
2. Locate the sensor — a thin metal rod, usually on the upper rear wall inside the oven.
3. Remove the two screws holding it and pull the sensor forward to expose its wiring plug.
4. Unplug the sensor from the harness.
5. Set your multimeter to ohms and measure across the sensor's two terminals.
6. At room temperature it should read about 1,080–1,100 ohms. A reading far off this — near zero (shorted) or infinite/OL (open) — means the sensor is bad and should be replaced.

4. Check the sensor wiring and plug

While the sensor is out, inspect the wiring harness and connector for damage, melting, or a loose fit. Reseat the plug firmly. A damaged harness can mimic a bad sensor.

If the sensor tests fine

Replace the oven temperature sensor

If the sensor reads out of range, replacing it clears F3 in the large majority of cases. The part is inexpensive, and on most GE ovens it's a straightforward swap: unplug the old one, plug in the new one, and screw it back in. Professionally done, expect about $100–$250 including the part.

Repair the wiring harness

If the sensor is good but the wiring or connector is damaged, repairing the harness ($80–$200) restores an accurate reading.

Replace the control board (ERC)

If you've replaced the sensor and confirmed good wiring but F3 persists, the control board itself is misreading the signal. This is the least common cause and the priciest fix — roughly $200–$400. Confirm the sensor and wiring are good before replacing the board.

How much does it cost to fix a GE F3 error?

• Power reset / repositioning the sensor: $0 (DIY)
• Oven temperature sensor replacement: $100–$250
• Wiring harness repair: $80–$200
• Control board (ERC) replacement: $200–$400

The sensor is the most common fix and is relatively affordable. A DIY sensor swap (with the breaker off) can cost just the price of the part.

Repair or replace?

A temperature sensor replacement is almost always worth it — it's cheap relative to a new oven. A control board replacement nearing $400, however, gets closer to the 50% rule: if your oven is 12–15+ years old and the board is the issue, weigh that repair against a new range. For the common sensor fix, repair is the clear winner.

Does a home warranty cover a GE F3 repair?

Ovens and ranges are commonly covered on home warranty appliance and combo plans. A failed temperature sensor, wiring fault, or control board is a classic wear-and-tear breakdown that would typically be covered — you'd pay just your service call fee, up to your plan's cap. Given how affordable a sensor is, a DIY fix may be cheaper than the service call, but the board repair is where coverage really pays off.

When to call a professional

Call a technician if:

• You're not comfortable working around 240V wiring or using a multimeter.
• The sensor tests fine but F3 persists (likely the control board).
• You see melted wiring, scorching, or other electrical damage.
• The oven is under manufacturer warranty.

The bottom line

The GE F3 error points squarely at the oven temperature sensor: the control board is getting a reading it can't trust, so it stops the oven for safety. Start with a power reset and make sure the sensor isn't touching the wall. If F3 returns, test the sensor — about 1,080 ohms at room temperature is healthy — and replace it if it's off. The sensor is an affordable part and the fix for most F3 codes. Only when a good sensor and wiring don't solve it should you suspect the pricier control board.

Related articles

• Oven & Stove Repair Cost Guide
• Average Appliance Repair Cost in 2026
• What Appliances Does a Home Warranty Cover?
• Repair or Replace: How to Decide for Any Appliance

📌 This guide is general information for 2026 and not a substitute for your appliance manual. Error-code behavior varies by model — always check your GE manual and switch off power at the breaker before servicing.