LG Dishwasher E1 Error Code: Temperature Sensor Fault
Quick Answer
E1 on an LG dishwasher specifically targets the NTC thermistor as the fault, distinct from HE which can indicate either the heater or the sensor. E1 means the thermistor reading was outside the expected window. At room temperature (approximately 20-25 C) the thermistor should read in the 10-50k ohm range.
E1 on an LG dishwasher specifically targets the NTC thermistor as the fault, distinct from HE which can indicate either the heater or the sensor. E1 means the thermistor reading was outside the expected window. At room temperature (approximately 20-25 C) the thermistor should read in the 10-50k ohm range. A reading of OL (open) is the most common failure mode. The thermistor is the same part as the HE sensor: EAF63615501, priced at $12-22.
What Does the E1 Code Mean?
E1 is a thermistor fault on LG dishwashers. Test the NTC thermistor -- it should read 10-50k ohms at room temperature. If it reads OL or out of range, replace EAF63615501.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Symptoms You May Notice
- E1 displayed during or after wash cycle
- Dishes may not be cleaned with hot water
- Sanitize or high-temp cycle aborts with E1
- No visible mechanical failure
Can you reset a Lg dishwasher to clear the E1 code?
After replacing the thermistor, unplug for 60 seconds and restart. Run a cycle with High Temp or Sanitize to confirm the temperature circuit functions without triggering E1.
Tools Required for Diagnosis
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
Disconnect power and allow the dishwasher to cool to room temperature
Disconnect power and allow the dishwasher to cool to room temperature. Locate the NTC thermistor -- it is clipped to the heating element or the lower sump area. Disconnect the two-pin connector and measure resistance across the thermistor terminals.
If the thermistor tests good
Replacement Parts
If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.
| Part Name | OEM Number | Estimated Price |
|---|---|---|
| NTC ThermistorEAF63615501 · $12–$22 | EAF63615501 | $12 – $22 |
Repair vs. Replace Calculator
Frequently Asked Questions
What is the difference between LG E1 and HE?
Related Lg Dishwasher Error Codes
Same Fix Works on These Brands
Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.
Models Known to Experience E1 Errors
This repair applies to most Lg dishwashers with this error code. Common model numbers include:
LDFN4542D, LDF5545ST, LDFS5788S, LDP6763ST, LDFN3432T, LDFN4542S, LDFN4542W
Last verified for technical accuracy on March 14, 2026