Does your LG dryer display the frustrating error code HS? You’re not alone. This common issue signals problems with the dryer’s humble but important humidity sensor. As the tiny sensor works behind the scenes to monitor moisture levels, it plays a big role in determining when loads are dry. But when things go wrong with this discreet component or related systems, the HS code appears. Learn how to troubleshoot the main causes of this issue and get your LG dryer back in working order.
What is the humidity sensor?
The humidity sensor is an important component in LG dryers. It measures the moisture levels during the drying cycle. Understanding how it works can help troubleshoot issues with HS error codes.
A. Function of the humidity sensor
The main job of the humidity sensor is to monitor the moisture levels inside the dryer drum. It provides feedback to the control board throughout the drying cycle.
- Measures the relative humidity of the air in the drum
- Sends data to the control board
- Helps determine when clothes are dry
Without a working humidity sensor, the dryer won’t know when to turn off!
B. Location of the humidity sensor
The humidity sensor is usually located inside the dryer drum near the front. It has a thin, cylindrical shape.
- Mounted on the dryer’s front bulkhead
- Sits inside the drum near the lint filter
- It may be difficult to see through the perforations
On some models, accessing it requires partially disassembling the dryer. Refer to the manual for step-by-step instructions.
C. How the humidity sensor works
The humidity sensor uses an electrical current to detect moisture levels. Here’s a simple explanation of how it works:
- Contains two metal plates that generate a weak electrical current
- When moisture is present, electrons move between the plates
- The more moisture, the more electrons flow between the plates
- This electron flow generates a signal
- The signal is sent to the control board
- The control board uses this data to monitor drying progress
As the clothes dry, the airflow carries less moisture. This changes the electrical current between the sensor plates. The control board uses those readings to know when the cycle is complete. Pretty neat!
Potential causes of the HS error code
Seeing HS pop up on your LG dryer’s display? This error code means there’s an issue with the humidity sensor. Below are some common things that can cause the HS code to appear.
A. Faulty or damaged humidity sensor
The most likely cause of an HS error is a problem with the humidity sensor itself.
- The sensor may be cracked, dirty, or worn out
- Electrical components inside the sensor could fail
- Damage from a power surge is possible
If the sensor is defective, it can’t accurately read moisture levels. This triggers the error code.
B. Clogged or blocked sensor
Lint and debris buildup around the sensor can interfere with its readings.
- Lint or dirt stuck to the sensor disrupts the electrical current
- Clumped lint inside the dryer may partially block the sensor
- Cleaning the sensor and ductwork often prevents blockages
With its readings obstructed, the sensor can’t work properly to measure moisture.
C. Poor airflow
Restricted airflow can keep moisture from reaching the sensor.
- Blockages in the vent or ductwork limit airflow
- Lint buildup inside the drum traps moisture
- A problem with the exhaust fan affects air circulation
This airflow issue prevents the sensor from accurately tracking moisture levels during drying.
D. Loose or damaged wiring
The sensor relies on secure wiring to transmit signals.
- Loose sensor connections interrupt the signal
- Damaged or worn wires prevent proper signal transmission
- Electrical shorts along the wiring can occur
With compromised wiring, the sensor and control board can’t communicate properly.
E. Faulty control board
Since the control board interprets the sensor’s signals, board issues can produce an HS code.
- The control board may misread the sensor’s electrical signals
- Short circuits or burnt-out components on the board are possible
- Damaged circuitry prevents proper communication with the sensor
So, even a working sensor can trigger an HS error if the control board is faulty.
F. Incorrect sensor installation
If the humidity sensor is installed improperly, that could generate an error.
- The sensor may be positioned incorrectly in the dryer
- The wiring is loose or not securely connected
- The sensor mounting bracket is damaged or loose
Improper sensor installation prevents accurate operation and readings.
Safety precautions
When inspecting and repairing any appliance, safety should always come first. Follow these tips to safely troubleshoot an LG dryer showing an HS error code:
1. Power off and unplug the appliance
- Unplug the dryer from the electrical outlet before inspecting or repairing
any parts. This prevents electric shock injuries. - Don’t just turn off the machine – make sure it’s fully disconnected from the power source.
2. Allow time for the appliance to cool down
- The dryer may still be hot from a recent cycle. Avoid burns by allowing
sufficient time for the drum and internal parts to cool before servicing.
3. Work in a well-lit area
- Use adequate lighting to see all the working areas inside the appliance clearly. This makes inspection easier and safer.
4. Keep the workspace free of clutter and obstacles
- Remove any objects or debris that could get in the way during the repair process. Having an unobstructed workspace prevents accidental falls or injuries.
5. Avoid working with wet hands
- Dry your hands thoroughly before handling any electrical components. Working with wet hands can lead to electrocution.
6. Check the user manual for specific instructions
- Reviewing the manufacturer’s directions can provide critical safety tips. Follow all precautions in the manual for your dryer model.
7. Handle parts gently
- Many dryer components are fragile, especially electronic boards and wiring. Handle all parts with care to avoid damage during repairs.
8. Wear insulated work gloves
- Gloves help protect your hands from sharp edges and hot components inside the appliance. Choose gloves designed for appliance repair.
9. Avoid touching exposed wires or terminals
- Prevent shocks by only contacting wires or terminals when necessary during testing or repairs. Do not handle live electrical parts unnecessarily.
10. Consider wearing safety glasses and/or a dust mask
- Debris or broken parts are possible when disassembling appliances. Glasses protect your eyes, while a mask prevents inhalation of lint and dirt.
Following basic precautions makes troubleshooting an HS error much safer. Don’t take chances – focus on staying safe.
Troubleshooting steps
Got an HS error on your LG dryer? Try these troubleshooting steps to identify and fix the problem:
First checks
Start with some quick checks before taking the machine apart:
- Check the power cord and outlet
- Make sure the power cord is plugged in securely, and the outlet is functioning. A loose connection can cause errors.
- Check the temperature setting
- An overly high heat setting can sometimes display an HS code. Try a lower temp setting to see if the error clears.
- Check for overloading
- An overloaded drum restricts airflow, which can affect the humidity sensor. Remove some clothes and retry a cycle.
Step 1 – Check the humidity sensor
If the simple checks don’t fix the issue, it’s time to inspect the sensor:
- Locate the humidity sensor
- Refer to the manual for your model’s sensor location. It’s typically inside the drum near the front.
- Check for damage
- Examine the sensor for any cracks, dirt buildup, or corrosion. Test its electrical connections.
- Clean the sensor
- Use compressed air or a vacuum to remove any lint or debris from the sensor and surrounding area.
Step 2 – Check the dryer’s airflow
Problems with airflow can trigger an HS code:
- Check the vent and ducting for blockages
- Disconnect the vent and inspect the inside with a flashlight. Remove any lint or obstructions.
- Clean out any obstructions
- Use a vacuum hose to extract built-up lint from the vent, ductwork, and inside the dryer cabinet.
Step 3 – Power cycle the dryer
Resetting the machine’s computer often resolves error codes:
- Unplug the dryer for 30 seconds
- This clears stored error codes and resets the computer.
- Plug the dryer back in and wait for the system to reset
- Allow a minute or two for the dryer to reboot after plugging it back in.
- Test the dryer
- Run a drying cycle to see if the HS code returns. This power reset may have cleared the issue.
Step 4 – Check the wiring harness
Faulty wiring between parts can cause HS errors:
- Check for damage to the wiring harness
- Visually inspect the wire harness that connects the sensor to the control board. Look for breaks, loose connectors, etc.
- Repair or replace the wiring harness as needed
- If damage is found, you may need to replace the wire harness. Make sure all connections are secure.
Step 5 – Check/replace the control board
If all else fails, the control board may need replacement:
- Check the control board for damage
- Examine the board for any burnt spots or damaged components. Test ports and connections.
- Replace the control board if necessary
- If the control board is faulty, replacing it should resolve the HS error code.
Carefully working through these steps should reveal the source of an HS error on an LG dryer. Let the troubleshooting begin!
Dryer maintenance & error code prevention tips
Proper maintenance and usage can prevent many HS error codes. Follow these tips to keep your LG dryer running smoothly:
1. Clean the lint filter regularly
- Lint buildup is the main cause of restricted airflow and humidity sensor issues.
- Clean the filter before every cycle to remove lint and improve airflow.
2. Check and clean the venting system
- Clogged vents cause airflow problems that can trigger HS errors.
- Inspect and clean the full vent system annually to remove blockages.
3. Avoid overloading the dryer
- Overstuffing the drum prevents air from circulating freely.
- Only dry full but loose loads to allow airflow across clothes.
4. Be careful with fabric softener
- Excess softeners on clothes can stick to the humidity sensor.
- Use softener sparingly and avoid spills inside the dryer.
5. Set the temperature correctly
- High heat dries clothes too quickly, shortening the moisture-sensing time.
- Use medium or low heat for optimal sensor function.
6. Ensure secure electrical connections
- Loose wiring causes connectivity issues between the sensor and control board.
- Check wiring for tight connections to prevent intermittent HS errors.
7. Check for firmware updates
- Software bugs can sometimes cause false error codes like HS.
- Update to the latest firmware version to fix known issues.
Routine care and proper usage go a long way towards avoiding HS headaches! Implementing these tips will help minimize annoying sensor errors.
Conclusion
Dealing with an HS error code on your LG dryer can be frustrating. But don’t worry – identifying the cause is possible with some focused troubleshooting.
The humidity sensor plays a key role in monitoring moisture levels during drying cycles. If this component malfunctions or gets obstructed, the HS code appears.
Potential culprits include a faulty sensor, blocked airflow, wiring problems, and more. Carefully inspecting the sensor, venting, and connections can reveal the root cause.
Following safety precautions is critical when working on any appliance. Make sure to unplug the dryer and allow components to cool before servicing.
With patience and persistence, you can determine why the HS error is occurring on your dryer. Address the source issue, whether it’s a damaged sensor, clogged vent, or problem with the control board.
Stay on top of maintenance, such as cleaning the lint filter and venting ducts. This preventive care reduces annoying sensor errors in the future.
Don’t let an HS code ruin your laundry day. Roll up your sleeves and methodically troubleshoot the issue. Soon, you’ll be drying clothes comfortably again!