Quick Reference — LG Oven Error Codes
- F1–F3 — Temperature sensor / thermistor faults (pro repair)
- F4–F5 — Control board or keypad failures
- F7 / F9 — Door lock / self-clean latch errors
- tE1–tE3 — Upper, lower, or broil thermistor out of range
- dE1–dE4 — Door not closing or door sensor fault
- SE — Stuck key on touchpad or control panel short
- Repair cost: $150–$350 | $89 diagnostic — waived with repair
LG ovens and ranges are known for their ProBake Convection and EasyClean features, but like all modern appliances they use alphanumeric error codes to flag problems with their sensors, door locks, and control systems. This guide covers every LG oven error code, what it means, and the steps to take — whether you can fix it yourself or need a certified technician.
LG Oven Error Codes — Complete Table
The codes below apply to LG freestanding ranges, slide-in ranges, wall ovens, and double ovens. Some codes vary slightly between model families — always check your model's use and care guide for confirmation.
| Error Code | Meaning | Common Cause | Fix | DIY? |
|---|---|---|---|---|
| F1 | Stuck key or EEPROM error | Control board memory fault or button jammed | Press Cancel; reset power. If persistent, control board replacement needed | Pro |
| F2 | Oven temperature too high | Runaway heat — thermistor, relay board, or control board fault | Cancel and unplug immediately; do not use oven until inspected | Pro |
| F3 | Oven sensor open circuit | Failed or disconnected temperature sensor (thermistor) | Test sensor resistance (~1,085 ohms at room temp); replace if open | Pro |
| F4 | Oven sensor shorted | Temperature sensor shorted to ground | Replace oven temperature sensor | Pro |
| F5 | Door latch / control fault | Door lock motor not responding to control board | Check door latch mechanism; test door lock assembly | Pro |
| F7 | Stuck function key | Touchpad key held down or shorted | Press all keys to free stuck button; clean panel; replace touchpad if needed | Inspect First |
| F9 | Door latch failure | Door lock motor or switch failed during self-clean | Let oven cool; unplug 10 min; if door stays locked, call technician | Pro |
| tE1 | Upper oven thermistor fault | Upper sensor failed or wiring loose | Reset power; replace upper thermistor if error returns | Pro |
| tE2 | Lower oven thermistor fault | Lower sensor failed (double oven models) | Reset power; replace lower thermistor if error returns | Pro |
| tE3 | Broil thermistor fault | Broil element temperature sensor failed | Reset power; replace broil thermistor | Pro |
| dE1 | Door not closed (oven 1) | Door latch not engaging, broken hinge, or door sensor fault | Check door alignment and gasket; inspect latch; replace door switch if needed | Inspect First |
| dE2 | Door not closed (oven 2) | Same as dE1 on lower oven of double-oven models | Same steps as dE1 for lower cavity | Inspect First |
| dE3 | Door sensor open circuit | Door position sensor wiring disconnected | Inspect wiring harness to door sensor; replace sensor if open | Pro |
| dE4 | Door sensor shorted | Door sensor wiring shorted | Replace door sensor or wiring harness | Pro |
| SE | Stuck key on keypad | Button jammed or membrane touchpad short | Press all keys; clean panel; replace touchpad or control board | Inspect First |
How to Fix the Most Common LG Oven Error Codes
F2 — Oven Overheating
F2 is triggered when the oven temperature sensor reads above approximately 615°C (1,140°F), which is far beyond any cooking temperature. The most common causes are a shorted temperature sensor sending a false low reading (tricking the control into running the element at full power) or a failed relay on the control board that stays closed.
F3 / F4 — Temperature Sensor (Thermistor) Faults
The oven temperature sensor is a probe mounted at the top rear wall of the oven cavity. F3 means it reads as an open circuit (too high a resistance) and F4 means it reads as a short (too low a resistance). At room temperature, a healthy LG oven sensor should measure approximately 1,080–1,090 ohms with a multimeter.
- Unplug the oven and locate the sensor probe at the top-rear of the oven interior — it is held in place by one or two screws and connected via a wiring harness.
- Disconnect the harness and measure resistance across the sensor terminals. Replace the sensor if it reads open (infinite ohms) or shorted (near zero).
- If the sensor tests good, the wiring harness between the sensor and control board may be damaged — inspect for burnt or pinched wires.
F9 — Door Lock Failure After Self-Clean
The self-clean cycle locks the oven door and runs at temperatures around 480°C (900°F). The F9 code appears when the door lock motor or door lock switch fails to complete its travel — either locking at the start of self-clean or unlocking at the end.
- Press Cancel and wait for the oven to cool fully (this can take 45–90 minutes).
- Once cool, unplug the oven for 10 minutes, then plug it back in. The control board may reset and release the latch.
- If the door remains locked or F9 returns, the door lock motor assembly needs replacement — do not try to force the door open, as this will break the latch permanently.
tE1 / tE2 / tE3 — Thermistor Out-of-Range Codes
These codes appear on LG ovens equipped with ProBake Convection and dual-cavity models. They indicate the named thermistor (upper oven, lower oven, or broil sensor) has read a temperature outside the expected operating range — typically below -40°C or above 350°C at idle.
If the tE code returns after a reset, the corresponding thermistor needs to be tested and replaced. These are relatively low-cost parts, but accessing the lower-oven and broil sensors on some models requires removing the oven from the cabinet.
dE1 / dE2 — Door Not Closed Errors
The oven will not heat if it detects the door is open. Check that:
- No food, foil, or oven rack is blocking the door from closing fully
- The door gasket (seal) is intact and not bunched or torn
- The door hinges are not bent — a dropped oven door or heavy impact can bend hinges, causing the door to sit at an angle
- The door latch hook and the latch receiver on the oven frame are aligned
If all of the above look fine, the door position switch itself may have failed and needs replacement.
SE — Stuck Key
The SE error means the control panel has detected a key press lasting more than 60 seconds, which it interprets as a stuck or shorted button. Wipe the panel with a dry cloth and press each button firmly to free any that feel sticky. If the error appears at startup without anyone pressing buttons, the touchpad membrane has failed internally and needs replacement — this is a moderately priced part available for most LG models.
LG Range vs LG Wall Oven — Code Differences
LG freestanding and slide-in ranges share the same error code set as LG wall ovens. The main practical difference is access: on a wall oven, you may need to pull the unit partially out of the cabinet to reach sensor wiring, whereas on a freestanding range most repairs are accessible from inside the oven cavity or by removing the back panel.
When to Call a Technician for LG Oven Errors
- F2 (overheating) — always a professional repair, as it involves fire safety
- F9 (door lock stuck after self-clean) — do not force the door
- Any F-code that returns immediately after a power reset
- tE codes that persist after reset — incorrect temperature readings lead to food safety issues and can damage the oven
- Any code accompanied by burning smell, sparks, or visible damage to wiring
Frequently Asked Questions — LG Oven Error Codes
The F3 error on an LG oven indicates an open or shorted oven temperature sensor (thermistor). The sensor has either failed completely or lost connection. A technician will test the sensor resistance with a multimeter — it should read around 1,080–1,090 ohms at room temperature — and replace it if faulty.
The tE1 error means the upper oven thermistor (temperature sensor) has detected an out-of-range reading. This is usually caused by a failed thermistor or a loose wiring connection to the sensor. Try resetting the oven by unplugging it for 5 minutes. If the error returns, the thermistor needs professional replacement.
The SE error indicates a stuck or shorted key on the control panel. Press each button firmly to see if one is jammed. Clean around the buttons with a dry cloth. If the error persists after a reset, the touchpad or control board may need replacement.
The dE1 error means the oven door is not closing or latching properly. Check that nothing is caught in the door hinge, inspect the door gasket for damage, and ensure the door is aligned correctly. If the door latch motor or switch has failed, a technician will need to replace the door lock assembly.
The F9 error indicates a door locking failure during or after a self-clean cycle. The oven door may be stuck locked. Do not force the door open. Allow the oven to cool completely, then unplug it for 5–10 minutes and plug back in. If the door remains locked or the error persists, call a certified technician — forced entry can damage the latch mechanism permanently.
Yes. Press the Cancel key, then unplug the oven from the wall outlet (or switch off its circuit breaker) for 5 minutes. Plug it back in and test. This clears temporary electronic faults. If the error code returns immediately, there is an underlying component failure that needs diagnosis.
LG oven repairs in Toronto and the GTA typically cost $150–$350 depending on the part required. Nick's Appliance Repair charges an $89 diagnostic fee that is waived when you proceed with the repair, plus a $40 OFF limited-time promo on any repair.