E5 On Hisense Portable Air Conditioner: What Does It Mean & How To Fix It?

If your Hisense portable air conditioner has an E5 error code showing up, but you have no idea what it means and how to deal with it, you have come to the right place! This article will answer all your questions about this error code.

Let’s dive in!

What does E5 mean on Hisense portable air conditioners?

Simply put, the E5 code on any Hisense portable indicates the water collection tank is full.

Most Hisense portable air conditioners are fully self-evaporating models meaning that the water collected through the condensation will be recycled. So technically, you don’t need to drain it.

However, when the climate becomes extremely humid, the excess moisture cannot be completely evaporated, causing the water tank to gradually fill.

When the E5 error code is displayed, the machine will automatically shut down to prevent the water from overflowing.

Some older Hisense models do not self-evaporate, but you can drain the water continuously with a drain hose.

Other causes of E5 error code on Hisense portable ac

Some customers notice that their Hisense portable air conditioners will display an E5 error code when the relative humidity is low or they have connected the drain hose to their devices. If this is the case, you may need to consider other possible causes.

Clogged drain hose

The drain hose is responsible for draining the condensate. Dirt, dust, and mold can accumulate inside over time and eventually clog the hose. As a result, the water will return to the tank, displaying the E5 error code when the tank is full.

Frozen evaporator coil

When there is insufficient warm air to warm the evaporator coil, it will freeze. The dirty air filter, the low temperature outside, and too many contaminants settled on the coil can lead to this issue.

When you turn off your air conditioner, the ice melts and the water tank fills up. When you turn on the machine again, the Hisense ac will detect the level of water in the tank and display the E5 code.

Low refrigerant level

Normally, the refrigerant in the compressor and coils remains untouched, and the level does not change. It may, however, leak out due to tear, wear, and other factors.

When the refrigerant level drops, it not only loses its ability to cool the air, but it can also cause the evaporator coil to freeze. Similarly, an E5 error code will appear on the panel.

How to fix the E5 error on Hisense portable air conditioner?

Now that you have figured out the common causes of an E5 code on a Hisense portable ac. Let’s explore how to troubleshoot and fix the problem.

Empty the condensate in the tank

Turn off your Hisense model, unplug it from the wall, and place a shallow container beneath the drain port. Now that the drain port is open, the condensate can drain into the container.

Replace the drain port and power cord when no water is coming out, then turn on the machine to see if the error code has gone away.

Check the hygrometer and thermometer

The tank will normally only fill up when the humidity is high. You can confirm the situation by checking the hygrometer. If the problem occurs when the humidity level is low, it is likely that your Hisense air conditioner has other causes.

You can also use the thermometer to determine whether it is too cold to run your air conditioner. As previously stated, low temperatures can cause your portable air conditioner to freeze and quickly fill up the tank.

Clean the drain hose

If you’ve connected your Hisense portable air conditioner to a drain hose and the E5 still appears, the drain hose is probably clogged.

To remove the buildup inside, disconnect the hose and use a brush on the wire. Alternatively, a new hose can be used.

Replace or clean the air filter

Turn your Hisense model and check the air filter that is located at the back. If it is full of debris and dust, take it out and rinse it under tap water. Once it is clean, allow it to air dry before replacing it. 

Restart your portable ac and observe if the E5 code shows up again. If it is not the main cause, cleaning the dirty filter is what you need to do anyway.

Clean the evaporator coil

When the air filter is not the culprit, you can check the condition of the evaporator coil. If it is filthy, use a can of compressed air to blow away the contaminants. Applying some HVAC cleaner or coil cleaner can speed up the cleaning process.

Fix the leak and recharge your ac

If none of the methods work, your ac may need to recharge. Don’t attempt to do it yourself since the refrigerant is harmful to us.

You should hire an HVAC technician who has the tools to test the refrigerant level in your ac and diagnose where the leak is.

After the leak is fixed, a recharge will only take less than an hour.

Return your newly purchased Hisense portable ac directly

What I mentioned above is not for a brand-new device. If your newly purchased device shows an E5 error code, your best bet is to return the product and get a new one. A good Hisense portable ac will not go wrong like this at the beginning. 


This is an in-depth look at the E5 on Hisense portable air conditioners. While E5 indicates that the water tank is full, a full tank can occur for a variety of reasons.

Aside from high humidity, a clogged filter, drainage hose, and evaporator coil could all be to blame. That is, by committing to a regular maintenance schedule, you can avoid this problem to a large extent.

If your Hisense portable air conditioner is brand new, it is best to return it.

About The Author

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Liz Yang is the founder of Airsmartly. She has been working at home for a few years and realizes that the performance of the HVAC system plays such an important role in our life. She has tested dozens of products in person, like humidifiers, air purifiers, dehumidifiers, and ACs, and wants to share tips about using or troubleshooting these products with you. Her uncle is an HVAC expert with over 30 years of experience in the field, and often offers assistance when she is unsure how to handle a situation. He is also in charge of reviewing the articles on this site.

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