If your LG dishwasher HE error code appears, it usually points to a heating problem. But things get more frustrating when you open the unit and discover the heating element is actually fine, and the real issue is a corroded connector.
This is common in models like LG LDF5545ST, where the connector is bundled inside an expensive pump assembly, even though only a small part has failed.
Quick Answer
The LG dishwasher HE error code can be caused by a corroded heating element connector, not the heater itself.
You can fix it by replacing the connector with a high-temperature ceramic terminal block instead of the full pump assembly.
Step-by-step solution to fix LG dishwasher HE error
Step 1: Confirm the heating element is working
Before replacing anything:
- Test resistance of the heating element
- If readings are normal → heater is OK
This confirms the issue is electrical, not mechanical.
Step 2: Inspect the heating element connector
Look for:
- Corrosion
- Burn marks
- Loose or broken spade terminals
This connector sits on a ceramic base and handles high heat, making it prone to damage over time.
Step 3: Identify the faulty part
The connector you described:
- Ceramic base (~17mm wide)
- Dual spade terminals
- Markings like:
- 260C (temperature rating)
- 155 131 003
This is a high-temperature ceramic terminal connector, not typically sold separately by LG.
Step 4: Understand why LG bundles the part
LG includes this connector in the:
- Pump case assembly (Part #ABT72989202)
This forces full replacement, even when only the connector fails.
Step 5: Replace with a compatible ceramic connector
Instead of replacing the entire assembly:
Search for:
- High-temperature ceramic terminal block
- Ceramic spade connector (260°C rated)
Make sure the replacement:
- Matches size and spacing
- Handles high heat
- Supports the same voltage/current
Step 6: Install the new connector properly
For a permanent fix:
- Use heat-resistant wiring
- Crimp or solder securely
- Ensure tight connections
Avoid loose terminals, as they cause overheating and repeat failure.
Step 7: Test the dishwasher
After installation:
- Run a full cycle
- Check if the HE error disappears
- Confirm heating function works
If successful, you’ve avoided a costly repair.
Extra tips and best practices
- Always use high-temperature rated components (≥260°C)
- Avoid cheap connectors that can melt
- Inspect nearby wiring for heat damage
- Keep connections clean and tight
- Use dielectric grease if appropriate
Common mistakes to avoid
- Replacing the entire pump assembly unnecessarily
- Using low-temperature connectors
- Ignoring corrosion signs
- Making loose or weak connections
- Skipping resistance testing
FAQ
What does LG dishwasher HE error mean?
It indicates a heating issue, often involving the heating element or its connections.
Can a bad connector cause HE error?
Yes. A corroded or broken connector can interrupt power to the heater.
Do I need to replace the pump assembly?
No. If the heater works, replacing the connector alone is enough.
Conclusion
If your LG dishwasher HE error code appears but the heating element tests fine, the real problem is often a failed ceramic connector. Instead of replacing the expensive pump assembly, you can fix it with a high-temperature terminal block.
This approach saves money and restores full functionality quickly.
Reference Links
https://www.lg.com/support
https://www.ifixit.com/Device/Dishwasher
https://owner.electrolux.com/support-articles/article/1819543-dishwasher-not-drying
