LG dishwasher HE error code
- Dishwasher
LG dishwasher HE indicates the control did not detect proper water heating during the cycle. LDF5545 and similar models need hot water at the inlet — a closed valve or cold slug in the line triggers HE before the heater fails. Clean the filter assembly so water circulates past the flow-through heater; a clogged sump mimics a heater fault.
Reviewed August 2025 · sources below
Safe to keep using?
Stop using
Severe overheating requires stopping use until the cause is identified.
- • Unplug the appliance before inspection.
- • Do not continue using the appliance until the cause is identified.
Next step
Still seeing HE?
Show a photo or describe the symptom. Answer a few safety-first questions and see whether a part is needed.
Free guided checks · No account required · Don’t open live electrical, gas, or refrigerant equipment
How to fix HE
- Open the hot supply valve fully and run hot water at the sink until it flows hot.
- Remove and clean the filter and sump area under the lower spray arm.
- Start a normal cycle and verify hot water enters within the first fill.
- If water stays cold, test the heating element or flow heater per the model wiring diagram.
- Replace the heater only after confirming hot inlet water and clear circulation.
Call a pro when: Call a technician if HE persists after heater replacement or wiring shows burn marks.
What HE means
Heater error — the dishwasher cannot heat wash water.
Parts for this repair
We don't yet have a verified exact part number for this model. Search for a compatible Heater.
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Likely causes
Many codes resolve with cleaning, resetting, or reconnecting.
Check: Power-cycle the appliance and check for obvious blockages or loose connections.
Est. cost: $0–$0
Wear or electrical failure of an internal part.
Check: If basic checks fail, the faulty component likely needs replacement.
Est. cost: $0–$75
Professional assistance recommended
This issue may be unsafe for DIY repair. Follow the safety guidance above and contact a qualified technician.
Questions about HE
What does HE mean on LG dishwasher?
HE is a heater fault — the wash water did not reach target temperature.
How do I reset LG HE?
Purge hot water, clean filter, power off 5 minutes, then rerun a heavy cycle.
Can cold inlet cause LG HE?
Yes — dishwashers need hot water at the inlet; cold slug in the line is a common cause.
Do I need a heater for LG HE?
Clean filter and confirm hot supply first — heater replacement is the next step if water stays cold.
LG HE on specific models
Other LG Dishwasher codes
Prevent this problem next time
- Follow manufacturer maintenance schedule
- Address small issues before they worsen
Sources
Manufacturer meaning
Heater error — the dishwasher cannot heat wash water.
FixApplianceCode guidance
Start with basic checks for LG HE before ordering parts.
Source type: Part database
Source: ModelPartFinder + FixApplianceCode editorial
Last reviewed: 2026-10-23
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