Error Code HE
Heater Error
Moderate
Address soon - your appliance may not work properly
Also displayed as: HE
What This Means
Wiring connection to heater disconnected; Inlet water temperature very high (over 185°F / 85°C); Thermistor damaged; Heater element faulty; Controller (main PCB) damaged; Relay circuit faulty
How to Fix
- 1
1. Check connectors RL2 pin4 ~ RL3 pin4 to main PCB for disconnection. Reconnect if needed.
- 2
2. Enter Test Mode to read current temperature. If temperature is displayed: adjust inlet water supply temperature to 120°F.
- 3
3. If temperature is NOT displayed: check wiring connections and measure thermistor resistance (8-44 kΩ).
- 4
4. Check inlet water temperature. If over 185°F, reduce hot water supply temperature at water heater.
- 5
5. Measure heater resistance at connector RL2 pin4 ~ RL3 pin4: expected 11.54 Ohms ±10%. If open or short, replace pump casing assembly (heater is integrated).
- 6
6. Check heater supply voltage at RL2 pin4 ~ RL3 pin4: expected 120V AC ±15%. If voltage present but heater fails, replace heater assembly.
- 7
7. If heater and thermistor test good but error persists, check relay circuit. Replace relay circuit or main PCB assembly.
This Error Applies To
LG LUDP8997SN Series Dishwashers