# How to Fix LG Error HS (Humidity Sensor Error)
The “HS” error code on an LG washing machine (most commonly seen on washer/dryer combo units) indicates a problem with the machine’s ability to detect the humidity or moisture level during the drying cycle.
This error almost always points to an issue with the **Dryer Moisture Sensor** or the wiring connected to it. When the sensor fails, the washer cannot complete its programmed dry cycle because it doesn’t know when the clothes are dry, leading to the “HS” error.
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## Step-by-Step Fix: Diagnosing the HS Error
Before assuming the sensor is completely broken, perform the following troubleshooting steps, starting with the simplest solutions first.
### Step 1: Power Cycle and Reset the Machine
A temporary electronic glitch often triggers sensor errors. A full reset may clear the error code.
1. **Unplug:** Locate the washing machine’s power cord and unplug it completely from the wall socket.
2. **Wait:** Leave the machine unplugged for a minimum of 5 minutes to allow the main control board to fully discharge and reset.
3. **Plug In:** Plug the machine back in.
4. **Test:** Run a short “Dry Only” cycle to see if the HS error reappears.
### Step 2: Clean the Moisture Sensor and Drum
The Dryer Moisture Sensor is typically located inside the drum of the machine, usually near the bottom front (at the kick plate area) or sometimes incorporated near the lint trap. These sensors rely on contact with the laundry to measure moisture.
If the sensor is coated in fabric softener residue, soap buildup, or mineral deposits, it cannot take an accurate reading.
1. **Locate the Sensor:** Look inside the drum for two or three shiny metal strips or bars (they look like small metallic fingers).
2. **Prepare Cleaner:** Dampen a cloth (or a soft sponge) with warm water and a little bit of mild soap, or distilled white vinegar. **Do not use abrasive scouring pads or steel wool.**
3. **Wipe Clean:** Thoroughly wipe down the metal strips until they are shiny and free of residue.
4. **Dry:** Ensure the strips are dry before attempting another cycle.
### Step 3: Check the Wiring Harness
If the sensor is clean and the machine has been reset, the problem may be a loose or damaged connection.
**Note:** This step requires accessing the internal components of the machine and should only be performed after ensuring the unit is unplugged.
1. **Access the Sensor:** Depending on your model, you may need to remove the top panel or the front panel to trace the sensor wires.
2. **Examine the Wires:** Trace the wires leading away from the moisture sensor. Look for kinks, cuts, signs of abrasion, or wires chewed by rodents.
3. **Secure the Connection:** Ensure the wire harness plug connecting the sensor to the main control board is seated firmly and securely. Even a slightly loose connection can trigger the HS error.
### Step 4: Test the Sensor for Continuity (Advanced)
If you have a multimeter, you can test the sensor for continuity to confirm if it has failed. A functional moisture sensor should show some resistance or continuity when tested.
* If the sensor shows **open resistance (OL or infinity)**, the sensor is defective and must be replaced.
### Step 5: Replace the Dryer Moisture Sensor
If you have performed the reset, cleaned the sensor, and confirmed the wiring is secure (or if the continuity test failed), the internal component has likely malfunctioned and needs to be replaced.
The Dryer Moisture Sensor is a relatively inexpensive part and is generally accessible for DIY replacement once you locate its position within your specific LG model.
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### Replacement Part
Check the price for a replacement Dryer Moisture Sensor here: https://www.amazon.com/s?k=LG+Dryer Moisture Sensor&tag=trivian-20
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