LG Range Error Codes — Complete Diagnostic Guide

Common Symptoms

• Error code on LG range or oven display (F3, F9, tE, EE, F5, ER, dH, HS)
• Oven fails to heat or shuts off mid-cycle with a blinking code
• Self-clean cycle won't start or aborts with F5 or dH code
• Convection fan runs constantly or not at all (ER error)
• Control board appears frozen or displays EE memory error
• Induction burner zone won't respond (hot surface HS warning)

Most Likely Causes

1. 1

   F3 — Upper Oven Temperature Sensor Open

   F3 means the upper oven RTD temperature sensor has an open circuit — the control board reads no signal from the sensor. The sensor mounts inside the upper oven cavity upper-rear wall. Test resistance at room temperature: a working LG oven sensor reads approximately 1,100–1,120Ω at 77°F (25°C). OL on the multimeter confirms the open circuit. Replace with EBG61106803 (LRE3061ST/LRG3061ST series) or your model-specific sensor — verify by model number. Resistance should rise predictably as temperature increases; a sensor that reads correctly at room temp but drifts to OL during heating requires replacement despite passing the cold test.

2. 2

   F9 — Lower Oven Temperature Sensor Open

   F9 is identical in diagnosis to F3 but applies to the lower oven cavity sensor in double-oven models (LRE3061ST double-oven configuration, LSGL6335F). On single-oven models, F9 may indicate a separate lower element temperature sensing circuit. Test the lower sensor using the same resistance check: probe the sensor terminals with the range unplugged — 1,100–1,120Ω at room temperature is correct. OL = open sensor, replace it. On double-oven models, F3 and F9 can appear simultaneously if the lower element has been overworked while the upper oven sensor is also marginal — address both sensors if both codes appear.

3. 3

   tE — Temperature Sensor Error (General)

   tE (displayed as 'tE' or 'TE') is a general temperature sensor error that fires when the sensor reading is out of the expected range — either too high (possible short) or too low (possible open). Unlike F3/F9 which specifically indicate open-circuit sensors, tE can also fire when the sensor is shorted (reads near 0Ω). Test resistance and compare: 1,100–1,120Ω at room temp = normal; OL = open (replace); near 0Ω = short (replace). A tE code can also appear if the wiring harness between the sensor and the control board has a loose connector or damaged insulation — inspect the harness before replacing the sensor.

4. 4

   EE — EEPROM Memory Error

   EE indicates the control board's EEPROM memory has a read/write failure. EEPROM stores calibration data, cook settings, and cycle history. A single EE occurrence after a power surge or brownout often clears after a 5-minute power reset. Persistent EE after multiple resets indicates the main control board's EEPROM chip has failed — the entire control board requires replacement. Before condemning the board, verify the home power supply is stable (wild voltage swings damage EEPROM chips) and check that the ground wire to the range chassis is secure.

5. 5

   F5 — Door Latch Fault

   F5 means the door lock assembly failed to complete its travel during self-clean lock or unlock sequence. The LG door lock assembly (MCK65863101 or model-specific equivalent) uses a worm-gear motor to drive the latch bolt. Diagnosis: check that the oven door closes fully with no gap. Confirm no foreign object is in the latch receiver pocket. Test the lock motor winding resistance with the range unplugged: disconnect the motor harness and probe the motor terminals — 200–500Ω is normal; OL = failed motor. If the motor tests good but the latch bolt jams, the cam gear is stripped — replace the entire door lock assembly.

6. 6

   ER — Convection Fan Motor Error

   ER fires when the control board detects the convection fan motor has stalled, is drawing excessive current, or is not spinning at the expected RPM. On LRE3061ST and LREL6325F models, the convection fan is at the rear of the oven cavity. Unplug the range, access the fan through the rear panel, and manually spin the fan blade — it should spin freely with no grinding. If it spins freely, test the motor winding resistance: 20–80Ω is typical; OL = failed motor. If the blade won't spin, check for grease accumulation or a failed bearing. The fan motor part number for LRE3061ST is EAU60905401; verify for your model.

7. 7

   dH — Door Hook Error

   dH indicates the door hook (locking pin) sensor is not reading the expected position. This differs from F5 (door latch motor fault) — dH specifically flags the hook position sensor or the physical door hook pin. Inspect the door hinge area: look for a bent door hook pin on the door, or a broken position sensor bracket on the oven frame. On LRG3061ST gas models, the dH code can also fire if the oven door is installed with an incorrect gap (door rubs the frame and the hook pin doesn't seat fully). Adjust the door hinges first — two mounting screws on each hinge allow minor position adjustment.

8. 8

   HS — Hot Surface Warning

   HS is a safety warning (not strictly an error code) that appears on LG induction models (LREL6325F, LSGL6335F) to indicate one or more cooktop zones are still hot enough to cause burns. The hot surface indicator remains on until the zone temperature drops below approximately 150°F (65°C). HS is normal operation, not a fault — it does not prevent cooking. If HS displays continuously and the cooktop is confirmed cool, the thermistor for the affected zone may have failed and is reading incorrectly high — this requires driver board or zone sensor replacement.

Quick DIY Checks

1. 1Enter LG range self-diagnostic mode: power the range on in standby (not cooking). Press and hold both the Start and Clear/Off buttons simultaneously for 3 seconds — the display will enter a diagnostic readout on most LRE3061ST and LRE/LRG-series models. Some models use a different sequence: press Bake + Broil simultaneously and hold for 3 seconds. Consult your model's service manual if neither sequence works — LG uses different diagnostic entry procedures across model years. The display will show the most recent fault codes in sequence. Exit by pressing Clear/Off. On SmartThinQ-enabled models (LREL6325F, LSGL6335F), open the LG ThinQ app, select your range, and tap Smart Diagnosis for a remote fault log readout.
2. 2Test oven sensors for F3, F9, tE codes: unplug the range. Open the oven door and locate the RTD sensor probe on the upper-rear wall of the oven cavity (or lower-rear for F9 on double-oven models). Remove the 2 mounting screws and gently pull the sensor probe out, disconnecting the harness plug. Set a multimeter to resistance (ohms) mode and probe the two sensor terminals: 1,100–1,120Ω at room temperature is correct. OL = open circuit (F3 or F9), replace sensor. Near 0Ω = short (tE), replace sensor. Order EBG61106803 for LRE3061ST/LRG3061ST series; verify model number for LREL6325F.
3. 3Diagnose F5 door latch fault: with the range unplugged, open the oven door and inspect the latch receiver (the notch in the oven frame where the bolt enters). Remove any debris or carbonized grease with a toothbrush. Close the door and check for any gap — the door must contact the oven frame evenly on both sides. If the door seals properly, reconnect power and set the oven to self-clean mode without pressing Start — observe whether the lock motor engages (you should hear a brief whir). If no motor sound, disconnect power again, access the lock assembly behind the control panel trim, and test the motor winding resistance. OL = replace the lock assembly (MCK65863101 or model-specific).

1. 4Check convection fan for ER error: unplug the range and access the oven rear panel (2–4 screws from inside the oven cavity). Locate the convection fan blade and hub. Gently try to spin the blade by hand — it should spin freely with minimal resistance. Sticky or grinding rotation = failed bearing or grease accumulation. Clean accumulated grease with a degreaser cloth and test again. If still tight, the motor bearing has failed — replace the motor (EAU60905401 for LRE3061ST, verify for your model). If the blade spins freely, test the motor winding resistance: disconnect the motor connector and probe terminals with a multimeter — 20–80Ω is normal; OL = failed motor.
2. 5Address EE EEPROM error: disconnect the range from power for 10 full minutes (longer than a standard reset). Restore power. If EE returns within 1–2 uses, perform a factory reset on models that support it: press and hold the Clear/Off button for 10 seconds until the display resets. If EE persists after factory reset, the main control board's EEPROM has failed — the control board requires replacement. Check LG's service bulletin for your model before ordering (EE can sometimes be a firmware issue addressed by a board reflash at an authorized service center rather than a full board replacement).

Repair vs Replace

Recommended Tools & Parts

• LG Oven Temperature Sensor EBG61106803

  RTD temperature sensor for LG LRE3061ST and LRG3061ST series ranges. Fixes F3, F9, and tE error codes. Should read 1,100–1,120Ω at room temperature. Verify model match before ordering.

  $15–$35

  Buy on Amazon →

• LG Range Door Lock Assembly MCK65863101

  Door lock motor and latch assembly for LG ranges. Fixes F5 door latch fault. Test motor winding resistance (200–500Ω) before ordering. Includes lock cam, motor, and bolt assembly.

  $35–$75

  Buy on Amazon →

• LG Convection Fan Motor EAU60905401

  Convection fan motor for LG LRE3061ST range oven cavity. Fixes ER convection fan error. Spin blade by hand before ordering — sticky rotation indicates failed bearing. Test winding resistance (20–80Ω).

  $30–$70

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• LG Range Main Control Board

  Replacement main control board for LG LRE/LRG series ranges. Required for persistent EE EEPROM errors after power reset. Match your model number exactly — control board part numbers vary by model year.

  $100–$185

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• Digital Multimeter

  Required for LG range sensor resistance testing, motor winding tests, and continuity checks. Resistance mode (ohms) is essential for sensor diagnosis.

  $15–$40

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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