Washer-dryer combo displays HE during drying; no heat or very low heat in dryer mode.

Safety first: Unplug the appliance and allow it to cool completely before servicing the heater circuit.

• 1. Verify airflow and lint:
  • Clean the lint filter and internal ducts.
  • Ensure external vent (if present) is not blocked.
• 2. Access heater assembly:
  • Remove the rear panel or top cover.
  • Locate the LG dryer heater housing and attached thermostats.
• 3. Test heater and safety devices:
  • Use a multimeter to check continuity of the heater element; replace if open.
  • Test the thermal cutoff and high-limit thermostat; replace any open devices.
• 4. Inspect wiring and relays:
  • Check for burnt connectors or wiring damage around the heater.
  • If heater and thermostats are good, the heater relay on the main PCB may be faulty; board replacement is typically required.
• 5. Call a technician if you are not comfortable testing high-voltage heater circuits.