LG LDP6797STDishwasher

Error Code HE

Heater Error — water not heated or tub overheated to over 194°F

Moderate

Address soon - your appliance may not work properly

What This Means

Wiring connection to heater (RL2 pin4 to RL3 pin4) disconnected; Inlet water temperature very high (over 185°F); Thermistor damaged; Heater faulty (resistance should be 11.54 ohm ±10%); Controller damaged; Relay circuit faulty

How to Fix

  1. 1

    Check connector RL2 pin4 to RL3 pin4 connection; replace heater assembly if disconnected

  2. 2

    If inlet water temperature over 185°F: adjust inlet water temperature to 120°F

  3. 3

    If temperature displayed in test mode: adjust inlet temperature; if not displayed: check wiring, resistance, and thermistor

  4. 4

    Check heater resistance: should be 11.54 ohm ±10%; replace heater assembly if not

  5. 5

    Check voltage between RL2 pin4 and RL3 pin4: should be 120V AC ±15%; replace main PCB if out of range

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