Hisense dehumidifier error code e9 (2024)

Dehumidifiers play an essential role in making our living spaces more comfortable. By maintaining optimal humidity levels, these devices prevent mold growth and ensure a healthier indoor environment. Hisense, a well-known brand in the home appliances sector, offers a range of efficient dehumidifiers. However, like all machines, they’re not immune to issues. One common error that Hisense dehumidifier users encounter is the error code E9. This article dives deep into understanding this error, its causes, and provides a step-by-step guide to rectifying it.

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Table of contents

Reasons Behind the error code e9

Several factors could trigger the error code E9 in your Hisense dehumidifier:

  1. Faulty Humidity Sensor: Over time, the humidity sensor may wear out or malfunction, leading to inaccurate readings or complete failure.
  2. Dirt or Dust Accumulation: Dirt and dust on the sensor can obstruct its proper functioning, leading to the error.
  3. Internal Wiring Issues: Sometimes, the internal wiring connected to the humidity sensor might become loose or damaged, resulting in the error.

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How to Fix the Error Code E9?

Now that we understand the reasons, let’s dive into the solutions. Remember, always unplug your dehumidifier before attempting any repairs.

Fix 1: Cleaning the Humidity Sensor for Hisense Dehumidifier

When your Hisense dehumidifier displays the error code E9, one of the most common culprits is a dirty humidity sensor. Over time, dust, grime, and other particles can settle on this sensor, disrupting its ability to measure the ambient humidity accurately. Cleaning it is a straightforward process that can often resolve the error and return your dehumidifier to its optimal performance.

Step-by-Step Guide to Cleaning the Humidity Sensor:

  1. Begin by Ensuring Safety: Always start by unplugging your dehumidifier from the electrical outlet. This ensures that you’re safe from any accidental electric shocks while working on the device.
  2. Access the Sensor: Start by opening the dehumidifier’s back panel. This will usually require a screwdriver. Once you have removed the panel, you should be able to locate the humidity sensor. Remember, it’s often positioned close to the evaporator coils, making it relatively easy to identify.
  3. Gently Clean the Sensor: With the humidity sensor in view, take a soft brush or cloth to gently clean it. It’s crucial to approach this step with caution, as the sensor is a delicate component. Ensure you remove all visible dust and debris. It’s recommended not to use any cleaning agents or chemicals, as these might damage the sensor or leave residues that could affect its performance.
  4. Reassemble the Dehumidifier: Once you’re satisfied with the cleaning, carefully reattach the back panel. Make sure all screws are securely tightened.
  5. Test the Device: Plug your dehumidifier back into the power outlet and switch it on. Observe its operation to see if the error code E9 still appears. If the error has been resolved, the cleaning was successful. If not, you might need to delve deeper into other potential causes or solutions.
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Fix 2: Inspecting and Securing Internal Wiring

Electrical connections can sometimes become loose or compromised due to wear and tear, leading to the dreaded error code E9 in Hisense dehumidifiers. Let’s explore how to inspect and possibly correct any wiring issues related to the humidity sensor.

  1. Safety First: Before you dive into the internal workings of your dehumidifier, make sure it’s unplugged from its power source to avoid electrical mishaps.
  2. Accessing the Dehumidifier’s Internals: Start by opening the back panel with a screwdriver. This will give you a view of the internal components, including the wiring connected to the humidity sensor.
  3. Locate the Humidity Sensor Wiring: This is usually close to the evaporator coils. Wires connected to it should be visible and easy to identify.
  4. Check for Loose Connections: Gently tug on the wires connected to the humidity sensor. They shouldn’t feel loose or detached. If they do, you’ve likely found the culprit.
  5. Re-secure Loose Wires: If you find any loose connections, try pushing the wire connectors back into place. Ensure they’re snug and secure.
  6. Inspect for Visible Damage: Besides loose connections, also check for any signs of wear, fraying, or damage on the wires. If you notice any compromised wires, they may need replacement or repair.
  7. Reassemble and Test: Once you’ve inspected and made necessary adjustments, put the back panel in place. Plug in the dehumidifier and monitor its performance. If the error code E9 disappears, the issue was likely a wiring problem.

Fix 3: Replacing the Humidity Sensor

If cleaning the sensor and checking the wiring don’t solve the error code E9, it might be time to consider a sensor replacement.

  1. Safety Comes First: As always, begin by unplugging the dehumidifier.
  2. Purchase a Compatible Sensor: It’s essential to find a replacement sensor that’s compatible with your specific Hisense model. You can often find these parts online or at specialized appliance stores.
  3. Access the Faulty Sensor: Open the back panel of the dehumidifier using a screwdriver. Locate the humidity sensor near the evaporator coils.
  4. Disconnect the Old Sensor: Carefully disconnect any wiring attached to the old sensor. Remember the configuration, so you can easily attach the new sensor in the same manner.
  5. Install the New Sensor: Attach the new humidity sensor in place, ensuring it’s securely positioned. Reconnect any wiring, mimicking the previous setup.
  6. Reassemble and Run a Test: Once the new sensor is in place, close up the dehumidifier by reattaching the back panel. Plug the unit into a power source and monitor its operations. If everything was done correctly, the error code E9 should no longer be an issue.

Replacing parts can be intimidating, but with a bit of patience and precision, you can breathe new life into your Hisense dehumidifier. Remember, if you ever feel unsure, seeking professional help is always a good idea.

Fix 4: Resetting the Hisense Dehumidifier

Sometimes, electronic devices, including dehumidifiers, can experience software glitches or minor malfunctions that can be cleared with a simple reset. If you’ve tried the previous solutions and the error code E9 still persists, resetting your Hisense dehumidifier might do the trick.

  1. Safety Precaution: Before attempting any actions, make sure the dehumidifier is unplugged from the electrical outlet.
  2. Locate the Reset Button: Some Hisense dehumidifiers come with a designated reset button. Check your user manual for its specific location if it’s not immediately visible.
  3. Press and Hold: Once located, press and hold the reset button for about 10 seconds. This often forces the unit to reboot, potentially clearing minor internal glitches.
  4. Power On and Observe: After the reset, plug your dehumidifier back in and turn it on. Check to see if the error code E9 has been cleared. If the error persists, it may be worth trying another fix.
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Fix 5: Checking and Cleaning the Air Filter

A clogged or dirty air filter can sometimes indirectly contribute to the error code E9 by affecting airflow and overall unit efficiency. Regular maintenance of the air filter is essential to ensure optimal dehumidifier performance.

  1. Unplug the Device: Safety first! Ensure the dehumidifier is unplugged before starting.
  2. Access the Air Filter: Most dehumidifiers have a front or side panel that gives access to the air filter. Gently open this panel or compartment.
  3. Examine the Filter: Remove the filter and check for significant dust, dirt, or debris buildup. If the filter looks dirty, it’s time for a clean.
  4. Clean the Filter: Using a soft brush or vacuum with a brush attachment, gently clean the filter to remove the accumulated dust. If your dehumidifier’s filter is washable, you can rinse it under lukewarm water. Ensure the filter is completely dry before reinserting.
  5. Reinsert the Filter and Reassemble: Once cleaned and dried, place the filter back into its compartment and close the panel.
  6. Test the Dehumidifier: Plug the dehumidifier back in and turn it on. Monitor its performance and check if the error code E9 has been resolved.

Remember, maintaining a clean air filter not only helps in preventing errors but also ensures that your dehumidifier operates at peak efficiency, prolonging its lifespan.

Fix 6: Verifying Proper Room Temperature

The operating temperature of the room can influence the performance of the dehumidifier. If the room is too cold, the coils inside the dehumidifier can freeze, leading to various error codes, including error code E9.

  1. Check the Room Temperature: Using a reliable thermometer, measure the current temperature of the room where the dehumidifier is placed. Most dehumidifiers operate efficiently between 60°F and 90°F.
  2. Adjust the Room’s Temperature: If the temperature is below the optimal range, consider raising the room’s temperature by using heaters or adjusting the central heating system.
  3. Allow the Dehumidifier to Thaw: If you suspect the coils have frozen, unplug the device and let it sit for several hours in a warmer environment to thaw.
  4. Turn On and Monitor: Once you’ve ensured the room is at an appropriate temperature, turn on the dehumidifier. Observe its performance to see if the error code E9 has been resolved.

Fix 7: Examining the Water Tank Placement

The placement of the water tank can sometimes cause errors. If the tank isn’t seated correctly, sensors might misread or trigger error codes.

  1. Unplug the Dehumidifier: As a safety measure, always unplug the device before making adjustments.
  2. Examine the Water Tank: Pull out the water tank and inspect it for any visible cracks or damage.
  3. Clean the Tank: Empty the water and give the tank a thorough rinse. This ensures that there’s no debris causing placement issues.
  4. Reposition the Tank: Carefully slide the water tank back into the dehumidifier, making sure it fits snugly and is correctly aligned with any sensors or switches.
  5. Power Up and Check: Plug the dehumidifier back in and monitor its operations. If the water tank was the issue, the error code E9 should now be cleared.
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Fix 8: Firmware or Software Update

Modern dehumidifiers often come with firmware or software that may need periodic updates. Outdated software can sometimes lead to errors.

  1. Consult the User Manual: Check if your Hisense dehumidifier model supports firmware or software updates.
  2. Visit the Manufacturer’s Website: Most updates can be found on the manufacturer’s official website. Navigate to the support or downloads section and look for any available updates for your specific model.
  3. Download and Install: If an update is available, download it to a USB drive or connect the dehumidifier directly (if supported) and follow the on-screen instructions to update the software.
  4. Restart the Dehumidifier: Once the update is complete, restart your dehumidifier and observe its performance.

By staying up-to-date with the latest software, you ensure that your dehumidifier operates efficiently and is free from software-related glitches that might cause error codes.


Encountering the error code E9 in your Hisense dehumidifier can be frustrating. However, with a clear understanding of its causes and the right approach to solutions, you can get your device up and running in no time. Whether it’s a simple cleaning task, checking the wiring, or replacing the sensor, the key lies in methodical troubleshooting. And if DIY isn’t your cup of tea, never hesitate to seek expert assistance. Your comfort and health are paramount, and ensuring your dehumidifier functions seamlessly is a step in the right direction.


What does error code E9 signify on a Hisense dehumidifier?

It’s often linked to issues with the humidity sensor or other internal malfunctions.

Can cleaning the humidity sensor resolve the error?

Yes, accumulated dust can hinder sensor performance. A gentle cleaning often helps.

My wires look fine. Could it still be an electrical issue?

Absolutely. Hidden defects or internal wire damage might still be causing the error.

How often should I clean the air filter?

Regularly, about once a month. But if your space is dusty, consider cleaning it more frequently.

Hisense dehumidifier error code e9 (2)

Prachi Mishra

Prachi Mishra is a talented Digital Marketer and Technical Content Writer with a passion for creating impactful content and optimizing it for online platforms. With a strong background in marketing and a deep understanding of SEO and digital marketing strategies, Prachi has helped several businesses increase their online visibility and drive more traffic to their websites.

As a technical content writer, Prachi has extensive experience in creating engaging and informative content for a range of industries, including technology, finance, healthcare, and more. Her ability to simplify complex concepts and present them in a clear and concise manner has made her a valuable asset to her clients.
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