What to check, in order
- Clean the sensor bars
They're the curved metal bars inside the dryer, just below the lint filter. Wipe them with a soft cloth lightly dampened with water and mild soap.
- Let them dry
Allow the sensors to dry fully before you run another cycle.
When to call an engineer
If HS keeps appearing after a clean, LG says the dryer needs service.
Good to know
- LG recommends cleaning the humidity sensor regularly anyway: a dirty sensor can leave clothes over-dried or still damp.
Quick answers
What does the LG HS error code mean?
The dryer has found a problem with its humidity sensor. LG says it then runs for 2½ hours, so it can seem as though it isn't drying.
Can I fix LG HS myself?
Very easy (about 5 minutes, plus drying time). Start with: clean the sensor bars; let them dry. If HS keeps appearing after a clean, LG says the dryer needs service.
Is LG HS worth repairing?
Usually free. Usually a dirty sensor, and cleaning it costs nothing.
Checked against
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.