What's Happening
The HS code indicates the dryer's humidity (moisture) sensor has malfunctioned or is reading outside its expected range. The moisture sensor consists of two metallic sensor bars located inside the drum, typically below the lint filter opening. As clothes become drier, they conduct less electricity between the bars, and the control board uses this signal to determine when the cycle is complete. Sensor bars coated with residue from dryer sheets or fabric softener are the most common cause of HS errors — the coating insulates the bars and mimics a faulty sensor reading.
How to Fix It
Unplug the dryer and locate the two silver sensor bars inside the drum (usually below the door opening). Wipe them with a cloth dampened with rubbing alcohol to remove any dryer sheet or fabric softener residue. Allow to dry completely before running a cycle. If the HS error persists after cleaning, use a multimeter to test continuity across the bars — a completely open circuit indicates a broken sensor bar or wiring harness that will need replacement.
Frequently Asked Questions
What does HS mean on an LG dryer?
HS stands for Humidity Sensor error. It means the moisture sensor inside the drum is malfunctioning or giving an out-of-range reading. In most cases this is caused by a coating of residue from dryer sheets rather than an actual sensor failure.
How do I fix the HS error on my LG dryer?
Clean the two metallic sensor bars inside the drum with rubbing alcohol. These bars are located below the lint filter opening and often get coated with residue from dryer sheets. A quick wipe is frequently all it takes to clear the HS code.
Can I use dryer sheets with an LG dryer?
Yes, but dryer sheets and fabric softeners leave a waxy film on the moisture sensor bars over time. LG recommends cleaning the sensor bars periodically (every few months) with rubbing alcohol to maintain accurate sensing, especially if you use dryer sheets regularly.
Will the HS code cause my clothes to be damp?
Yes. If the moisture sensor is malfunctioning, automatic drying cycles may end too early or run too long. If you see HS frequently, switch to a timed dry cycle as a workaround until the sensor is cleaned or replaced.