HS Moderate Easy DIY
LG Dryer HS — Humidity (moisture) sensor fault
LG Dryer · Error code HS
What HS Means
HS indicates the moisture sensor strips inside the drum — used by Auto Dry / Sensor Dry cycles to detect when laundry is dry — are reading incorrectly. The dryer either over-dries or stops the sensor cycle early.
Symptoms
- HS on display
- Sensor Dry cycles end too soon with damp clothes
- Auto cycles run far longer than expected
- Code appears intermittently
Common Causes
1
Fabric softener film on sensor strips
Dryer sheet residue insulates the metal strips.
2
Dirty sensor strips
Lint and detergent residue coating sensors.
3
Open or shorted sensor wire
Wire from sensor to control board failed.
4
Failed main control board
Sensor input circuit failed on the PCB.
How to Fix It
- Open the door and locate the two thin metal strips on the inside front bulkhead, just below the lint filter slot.
- Wipe the strips clean with a cotton ball dipped in white vinegar or rubbing alcohol — never use sandpaper, which removes the protective coating.
- Air-dry, then run a Sensor Dry cycle with a small damp load to confirm normal operation.
- If HS persists, unplug and inspect the sensor wiring harness from the strips back to the main board for breaks.
- Replace the moisture-sensor assembly if a wire is broken or a strip is damaged.
- Replace the main control board only as a last resort if a known-good sensor still triggers HS.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More LG Dryer Codes
Verified against manufacturer documentation: lg.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.