LG Dryer HS Error Code — What It Means and How It Affects You
The LG dryer HS error code indicates a heating-system related fault — typically a sensor or control that detects abnormal temperature behavior in the dryer. When your dryer shows HS it means the machine has detected either over-temperature conditions, a failed temperature sensor, or a heating circuit fault and has halted normal operation to protect the unit and your home. Common user impacts include longer drying times or no heat at all, unexpected cycle interruptions, clothes left damp, a burning or hot-odors, and in severe cases an increased safety risk such as overheating. Because heating issues can affect both performance and safety, it’s important to diagnose and fix the HS error promptly.
Common Causes
- Faulty temperature sensor (thermistor or NTC thermistor)
- Defective heating element or heater assembly
- Blown thermal fuse or tripped high-limit thermostat
- Blocked or restricted venting / lint buildup causing overheating
- Malfunctioning control board or heater relay
- Damaged wiring harness or loose electrical connections to the heater/sensor
- Faulty moisture sensor or incorrect sensor readings
- Door switch issues preventing proper cycle start/monitoring
Troubleshooting Steps
- Power cycle the dryer: Unplug the dryer for 5 minutes or turn off the breaker, then power it back on to clear transient errors.
- Check the lint filter and drum: Remove lint from the filter and inspect the drum for obstructions that may affect airflow or sensors.
- Inspect the venting: Disconnect the exhaust hose and inspect for lint clogs or kinks. Clean the vent thoroughly and test with the vent disconnected to see if the HS clears.
- Test for heat: Run a short cycle and verify whether the dryer produces heat. No heat indicates a heater, fuse, or power issue.
- Check the thermal fuse and high-limit thermostat: Use a multimeter to check continuity on the thermal fuse and thermostats. Replace any component without continuity.
- Measure the thermistor/temperature sensor: Test the thermistor resistance at room temperature and compare to the manufacturer specification. Replace if out of range or intermittent.
- Inspect the heating element and wiring: Look for visible breaks, burn marks, or loose connectors. Test heating element continuity with a multimeter.
- Examine the control board and relays: If the heater and sensors test good but the dryer still shows HS, the control board or heater relay may be failing — visual inspection for burnt components can help.
- Reset error codes: After replacing faulty parts or clearing vents, reset the dryer by cutting power for a few minutes or using the service mode reset (consult your manual).
- When to stop and call a pro: If you find burned wiring, repeated blown thermal fuses, or you’re not comfortable testing electrical components, stop and contact a certified appliance technician.