What HS means (lg hs error)
An lg hs error means an LG dryer has detected a fault with the humidity (moisture) sensor — the metal bars inside the drum that judge how dry the load is. When that sensor reads incorrectly the dryer cannot run sensor-dry cycles accurately and raises HS.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault on your LG Dryer. You may see one of them or several together, and they can build up gradually or appear suddenly after a power event, a long door opening, or recent service.
- The display shows “HS”
- Auto/sensor-dry cycles end too early or run too long
- Loads come out over- or under-dried
- Timed cycles may still work normally
Common causes
Several different faults can produce these symptoms. Working through the most likely causes in order helps separate a quick, owner-level check from a problem that needs trained service and the correct LG parts.
- Dirty sensor bars — fabric-softener film coats the moisture sensor
- Sensor fault — the moisture sensor reads out of range
- Wiring fault — the sensor connection is broken
- Control input fault — the board misreads the sensor
Troubleshooting steps you can try
Work through these checks in order before calling for service. Stop wherever you are unsure, or where high-voltage parts, gas, the sealed refrigeration system, or a heat-pump compressor are involved, and hand the rest to a qualified technician.
- Wipe the metal moisture-sensor bars inside the drum with a little vinegar to remove film.
- Run a sensor-dry cycle and see whether drying improves.
- Use timed cycles as a workaround while diagnosing.
- If HS persists after cleaning the bars, leave it for service.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the humidity/moisture sensor bars, sensor wiring, and control board. The correct part for your LG Dryer is matched from the model and serial number, and genuine LG components are fitted rather than generic substitutes so that performance, safety, and the appliance’s long working life are all protected. Confirming the failed part before ordering avoids replacing more than the fault actually requires.
When to call a technician
HS that stays after cleaning the sensor bars needs a technician to test the moisture sensor and its wiring. When the fix calls for trained service, book a visit through our scheduling page and an experienced, qualified technician will diagnose and repair it. For manufacturer documentation and model lookup, see the manufacturer at lg.com/us.
Prevention and care
Regular care keeps this condition from returning on your LG Dryer. Keep filters, vents, and the condenser or exhaust path clean, avoid overloading or blocking airflow, check that doors and seals close cleanly, and follow the LG maintenance guidance for your model. Because this unit relies on electronic control, protect it with a stable, correctly rated power supply and have any built-in or laundry installation done to LG specification so the control never sees an out-of-range condition. If a code appears, note exactly what was shown before you reset the appliance — that record helps the technician reach an accurate diagnosis and avoid replacing parts unnecessarily.
Related help and LG resources
Browse other LG Dryer diagnostics, read about professional LG Dryer repair, look up your unit in the LG models reference, or the related tE1 thermistor fault, or schedule a service visit. For LG manufacturer documentation and model lookup, visit the manufacturer at lg.com/us.
