What HS means
The dryer detected a problem with its moisture sensor. It will run for about 2.5 hours, so it can seem like it isn't drying.
Likely causes
- Dirty moisture sensor bars below the lint filter
Safe first checks
- Clean the sensor bars inside the drum just below the lint filter, and let them dry before running another cycle.
When to stop
If HS persists, request service.
Checked against: LG USA Support: LG Dryer error code list. Codes can differ by model and year, so confirm with your owner's manual.