LG dryer error code HS: A troubleshooting guide

The LG dryer humidity sensor error code HS is a common issue that can occur in LG dryers. This error code can be triggered when the humidity sensor in the dryer detects an irregularity in the moisture levels during the drying cycle. When the dryer’s control board displays the error code HS, it typically means there’s a problem with the humidity sensor.

Let’s discuss the possible causes behind fault code HS and how you can fix it yourself, so you can save yourself the cost of a service call.

If you find out that you need a new part for your dryer, enter your model number at AppliancePartsPros.com to order a replacement. You can find replacement humidity sensors here.

Disclaimer: The error code information provided in this article is based on general service manuals and may not apply to your specific appliance model. While we strive to offer helpful advice for DIY appliance repairs, variations in models and configurations can lead to differences in troubleshooting steps, error codes and part replacements. For the most accurate guidance, we strongly recommend consulting the technical sheet for your specific appliance model.

What is the humidity sensor?

The humidity sensor in your LG dryer helps regulate the moisture levels during the drying cycle. It detects the humidity level in the drum and sends a signal to the dryer’s control board to adjust the drying cycle accordingly.

The humidity sensor is usually located on the front of the lint filter housing. It will consist of two long bars that are connected to the dryer’s computer system via a wiring harness.

When the dryer is running, the humidity sensor continuously monitors the moisture levels in the laundry. If the sensor detects that the moisture levels are too high or too low, it sends a signal to the dryer’s computer system to adjust the drying cycle. This prevents your clothes from being over-dried or under-dried.

Potential causes of the HS error code

• Faulty or damaged humidity sensor: A damaged or faulty humidity sensor could send incorrect signals to the dryer’s control board.
• Clogged or blocked sensor: Lint or other debris can clog up your humidity sensor and prevent it from functioning properly. You may need to wipe off the sensor to clean it.
• Poor airflow: Bad airflow in the dryer can cause high humidity levels and the humidity sensor to become clogged or dirty. Check that the dryer is properly vented and that there are no blockages in the vent and duct path.
• Loose or damaged wiring
• Faulty control board
• Incorrect sensor installation

Read more: How to Clean a Dryer Vent (With Video!) – AppliancePartsPros Blog

Safety precautions

When working on any appliance, remember to keep safety first. Here are some tips to keep in mind:

• Always power off and unplug your appliance or switch off the circuit breaker before attempting any maintenance or replacement work. This keeps you safe by preventing any risk of electric shock.
• If the appliance has recently been used, give it plenty of time to cool down before working on it.
• Take your time and don’t rush while working to prevent accidents and personal injuries.
• Work in a well-lit area so you can clearly see and access appliance parts.
• Keep your workspace free of clutter and other obstacles. Keep children and pets away from the work area.
• Never work on internal parts with wet hands. Make sure the work area is completely dry.
• Check the user manual to see if there are specific installation or safety instructions related to your appliance or replacement part.
• Be gentle when handling or removing parts. Excessive force might damage the appliance or cause personal injury.
• Wear insulated work gloves to protect your hands from sharp metal parts and debris.
• When working with wires, avoid touching any exposed wires or terminals. If you need to touch a wire, use a non-conductive tool or wear insulating gloves to prevent electrical shock.
• Consider wearing safety glasses and/or a dust mask when working with chemicals, dust or a large amount of debris to prevent irritation or injury.

Troubleshooting steps

First checks

• Check that the dryer is plugged in correctly and that the power cord is securely connected.
• Make sure the dryer’s temperature is set correctly.
• Make sure the dryer isn’t overloaded.

Step 1 – Check the humidity sensor

1. Find the humidity sensor on the inside of the dryer door, located below the lint filter. It should consist of two long bars.
2. Check the sensor for any signs of damage, such as cracks or broken pieces. If the sensor is damaged, replace it with a new one.
3. Clean the sensor thoroughly with a soft brush or cloth to remove any debris or buildup.

Step 2 – Check the dryer’s airflow

Check the dryer’s vent and ducting to make sure the airflow isn’t blocked by any objects or debris. Make sure all the vents and vent exits are clear and unobstructed.

If the airflow is blocked, clean out any obstructions as soon as possible.

Step 3 – Power cycle the dryer

1. Unplug the dryer from the power outlet for 30 seconds.
2. Plug the dryer back in and wait for the system to reset.
3. Test the dryer to see if the issue has been resolved.

Step 4 – Check the wiring harness

Look over the wiring harness that connects the humidity sensor to the dryer’s computer system. Check for any signs of damage, such as cuts, frays, or loose connections. Repair or replace the wiring harness as needed.

Step 5 – Check/replace the control board

If the HS error persists, it may be related to the dryer’s control board. Check the control board for any signs of damage, such as cracks, burn marks, or corrosion. If the control board is damaged or the HS code just won’t go away, replace it with a new one.

Read more: How To Disassemble A Dryer (With Video!) – AppliancePartsPros Blog

Dryer maintenance & error code prevention tips

1. Clean the dryer’s lint filter regularly. A clogged filter can cause the dryer to work harder and overheat. Clean the filter after every load to keep good airflow.
2. Check and clean the venting system at least once every six months. Make sure the whole venting system – from the dryer vent to the outside vent hood – is clear and unobstructed to keep good airflow. Check for any blockages or kinks in the duct and clean it regularly.
3. Avoid overloading the dryer. Overloading can make the dryer work harder and overheat.
4. Be careful with fabric softener, which can leave residue on the dryer’s sensors. If you have to use fabric softener, clean the sensors regularly.
5. Make sure the dryer’s temperature setting is set correctly. If the temperature is too high, it can cause the dryer to overheat and display error code HS.
6. Make sure all the connections between the dryer and the electrical outlet are secure. Loose connections can cause the dryer to overheat.
7. Check the manufacturer’s website for firmware updates and install them as needed. Updating the firmware might help resolve any software issues that could be causing error code HS.

Additional information

Thank you for reading! We hope this guide helped you get your LG dryer working again.

If you have any other appliance repair needs or projects, don’t hesitate to explore our thousands of free videos and troubleshooting guides available. If you need replacement parts or some extra help with ordering them, grab your model number and head over to AppliancePartsPros.com, where you can chat with a pro, read our DIY blog and more.

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