LG Range E5 Error Code — What It Means
The E5 error code on an LG range indicates an oven temperature sensor (thermistor) fault. The control board cannot read the oven sensor correctly or detects a short circuit in the sensor wiring. LG documentation states that this code appears when the oven sensor is shorted for over one minute during cooking, or when the sensor circuit is open or otherwise out of specification.
This is a sensor-circuit fault specific to LG ranges, distinct from the 5E or SE codes found on other LG appliances. The range will not operate normally until the sensor problem is resolved and the error is cleared.
Common Causes
- Shorted or open oven sensor The thermistor has failed internally and reads out of range or shorted, triggering the fault after one minute of operation.
- Damaged or loose wiring connections Corrosion, heat damage, or loose connectors at the sensor or control board interrupt the signal and cause false readings.
- Pinched or frayed sensor harness Wiring pinched behind the oven cavity or near sharp edges can short to ground or break continuity.
- Low supply voltage LG range documentation notes that some range errors can be caused by low line voltage or power-supply issues.
- Faulty control board If the sensor and wiring test within spec, the main board may not be processing the thermistor signal correctly.
Step-by-Step Fix
- Turn off power at the circuit breaker for at least 30 seconds to reset the control, then restore power and check if the code clears.
- Pull the range out and remove the rear access panel or oven-cavity cover to expose the oven temperature sensor and its wiring harness.
- Inspect the sensor probe and harness for signs of heat damage, corrosion, pinched wires, or loose connectors at both the sensor and control board.
- Disconnect the sensor connector and measure resistance across the sensor terminals with a multimeter at room temperature, then compare the reading to your model’s service-manual specification.
- Check wiring continuity from the sensor plug to the control board connector to confirm no open or shorted wires in the harness.
- Replace the oven sensor if resistance is out of range, the sensor is shorted, or the probe is visibly damaged.
- Reassemble the range, restore power, run a test bake cycle, and verify the code does not return and oven temperature climbs normally.
Parts Often Needed
| Part | Notes |
|---|---|
| LG oven temperature sensor / thermistor | Amazon | Match the part number to your range model. The sensor mounts in the rear oven wall or cavity. |
| Oven sensor wiring harness | Amazon | Order only if wires are damaged, pinched, or connectors are melted and cannot be repaired. |
| LG range main control board | Amazon | Replace only after confirming the sensor and harness test good but the fault persists. |
When to Call a Pro
Call a qualified appliance technician if you are uncomfortable working with 240 V power, if the error returns after sensor replacement, or if you lack a multimeter and service documentation to verify sensor resistance and wiring continuity. A pro can also diagnose low-voltage conditions or control-board faults that require specialized test equipment and access to the manufacturer fault trees for your specific model.