Hisense Air Conditioner Not Cooling? Here’s What to Do

By SmartHomeBit Staff •  Updated: 06/12/23 •  21 min read


Air conditioners have become an essential part of our lives, especially during hot summers. However, it can be frustrating when our air conditioner fails to cool down the room effectively. One such example is the Hisense air conditioner. The problem of the Hisense air conditioner not cooling is quite common, and it is essential to know the reasons for this issue to fix it.

Several reasons can cause the Hisense air conditioner to not cool down the room, such as a dirty filter, a faulty compressor, or low refrigerant levels. It is crucial to address these issues timely to prevent any further damage to the air conditioner. Regular maintenance of the air conditioner can help it function correctly and prevent such problems from occurring.

Apart from regular maintenance, it is vital to choose the right size air conditioner depending on the room size and the purpose (e.g., residential, commercial). Using an air conditioner that is too small for a large room can lead to insufficient cooling performance and wasted energy. On the other hand, using an air conditioner that is too big for a small room can lead to high energy bills and unnecessary wear on the air conditioner.

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Reasons why a Hisense portable air conditioner may not be cooling efficiently

If your Hisense portable air conditioner is not cooling your room effectively, there could be several reasons. In this section, we will examine common causes of inefficient cooling with portable air conditioners. We will cover topics like appropriate unit sizing, ideal positioning within a room, and the impact of open vents and doors on performance. We will also discuss the importance of regular professional servicing to maintain optimal performance of your air conditioner.

Unit not properly sized for the room

Having an air conditioner that is not properly sized for the room can result in inefficient cooling, leading to discomfort and higher energy bills. Hisense portable air conditioners come in different sizes, and it’s important to choose the appropriate size based on your room dimensions to ensure optimal performance.

The BTU rating of an air conditioner determines its cooling capacity, so purchasing an AC unit with the proper BTU output based on the room size is crucial. Using a larger unit in a small room can lead to short cycling, higher electricity costs, and improper humidity removal, while a smaller unit in a larger room can struggle to cool down the space effectively.

Other factors such as insulation levels, ceiling heights, exposure to direct sunlight, and heat sources from electrical appliances or occupants can also affect the sizing process of AC units. By taking all these factors into account before selecting an AC unit, you can significantly improve its efficiency.

To avoid mistakes while purchasing an air conditioning system for your environment, you can use online calculators that consider various factors like room dimensions, ceiling height, and orientation towards sunlight. These calculators recommend appropriate BTU rating guidelines of AC units suiting your individual circumstances.

A common mistake that people make is installing an air conditioner that is too small for their space. In one example, a friend installed a 5k BTU unit in his bedroom, but he forgot to account for additional space above his wardrobe, leading to poor performance. It’s crucial to reassess your conditioned spaces and take into account external wall insulation sufficiency.

Lastly, it’s essential to note that hanging the Hisense air conditioner in front of a picture of a snow-covered mountain won’t make it cool more effectively. The size and BTU rating of the unit are the primary factors that determine its cooling power.

Unit not placed in an ideal location

Placement of a portable air conditioner is vital to achieve efficient cooling. The location of the unit plays a crucial role in its overall performance. If placed inadequately, the cooling capacity of the unit may reduce, increasing power consumption.

Optimal placement of the portable air conditioner ensures that the cool air generated by it circulates evenly around the room, offering maximum comfort. However, unsuitable placement may restrict airflow, causing hot spots around obstacles and hampering the unit’s overall performance.

To achieve maximum efficiency and energy savings, it is critical to place your Hisense portable air conditioner in a well-ventilated area, away from obstructions and sources of heat. It could be located near an open window or door for easy exhaust airflow or on a wall away from direct sunlight.

A case study showed homeowners complaining of inefficient cooling despite purchasing a new Hisense portable air conditioner suitable for their room size. However, upon inspection, the technician discovered that the unit was placed too close to a wall without enough clearance for proper ventilation. After relocating the unit to an optimal location with adequate airflow, their cooling issues were entirely resolved.

Overall, it is paramount to consider the placement of your Hisense portable air conditioner for maximum efficiency and performance. Make sure the unit is not placed in an ideal location that may hinder its ability to cool the room effectively.

Vents and doors in the room are open

When troubleshooting issues with a Hisense portable air conditioner, it is important to consider various factors that could affect its cooling efficiency. One common reason for inefficient cooling is having vents and doors in the room open. This can result in the cool air escaping through these openings, making it difficult for the unit to maintain a consistent temperature in the room.

It is also crucial to take into account the positioning of the unit in relation to these open vents and doors. If the Hisense portable air conditioner is placed too close to an open vent or door, it can disrupt the air flow and prevent it from reaching all parts of the room effectively.

To improve the cooling performance of the Hisense portable air conditioner, it is recommended to close any open vents and doors in the room during operation. Additionally, ensuring that the unit is placed away from these openings can also help in achieving optimal performance. So, always keep in mind to close the vents and doors in the room while using the Hisense portable air conditioner to get efficient cooling.

Unit needs to be serviced by a professional

To maintain efficient performance, it is important to consider professional servicing for your Hisense portable air conditioner. This is especially important if the unit lacks regular maintenance or has been in extensive use over a prolonged period. Routine servicing can help prevent dirt buildup, which can clog the system and limit its performance. When faced with such a situation, professional servicing can be done to address the issue. During the servicing process, experts can examine the overall functionality of the unit, including replacing any worn-out parts, to help the cooling system run smoothly.

Professional servicing is also essential for addressing refrigerant leakage that may be caused by damaged components within the air conditioning unit. You may also need to engage the services of a professional to repair or replace malfunctioning parts such as compressor coils or refrigerant tubes that can lead to reduced cooling performance. Proper installation and maintenance by professionals ensure efficient energy use and prolong the lifespan of your air conditioning unit. Having regular check-ups by specialized personnel can help detect any minor issues before they become costly repairs.

In summary, professional servicing is critical for effective sustained performance, ensuring optimal coolness at all times. If you encounter any issues with your Hisense air conditioner, it is important to check for possible power-related issues before considering replacing the unit. Remember, having your unit serviced by a professional is essential for uninterrupted performance.

Possible reasons why the unit is not receiving enough power to operate properly

Are you experiencing issues with your Hisense air conditioner failing to cool your space effectively? One of the possible reasons for this could be that your unit is not receiving sufficient power to operate correctly. In this section, we will explore some potential causes for an inadequate power supply, including:

  1. A disconnected unit
  2. A tripped circuit breaker
  3. A defective fuse

However, there is no need to worry since we have troubleshooting solutions that are easy to follow to help you get your air conditioner up and running smoothly.

Unit not plugged into a working outlet

When it comes to Hisense portable air conditioners, it’s essential to ensure that they receive the required amount of power to function properly. One of the common reasons why these units may not cool efficiently is because they are not plugged into a working outlet. It’s crucial to check if the outlet being used is in proper working condition and capable of providing the required voltage and amperage. Failure to do so can cause the unit to not receive enough power to operate and cool the room.

Another reason why a Hisense portable air conditioner may not function correctly is when the circuit breaker has been tripped. When the circuit breaker is tripped, the unit may shut off completely, causing it to stop cooling. In this case, resetting the breaker should resolve the issue.

Using extension cords or other electronic devices on the same circuit as the air conditioner can also lead to insufficient power supply, resulting in the unit not cooling properly. Therefore, it’s essential to connect the air conditioner directly to a functional outlet and ensure that no other electrical equipment is attached to avoid potential power supply issues.

Circuit breaker has been tripped

When using portable air conditioners, like the Hisense models, it is essential to have a proper power source to ensure efficient operation. Unfortunately, there are times when the circuit breaker may trip, resulting in inadequate power supply to the air conditioner, causing it not to function properly. To resolve this issue, follow these four simple steps:

Steps Description
1 Turn off the air conditioner and locate the electrical panel where the circuit breaker is housed.
2 Check if the circuit breaker has tripped by looking for a switch that has moved to the “off” position. If this is the case, reset the circuit breaker by moving it all the way back to the “on” position.
3 If resetting the circuit breaker does not work, or it repeatedly trips, unplug the air conditioner from its current outlet and plug it into another one.
4 If you still experience issues after following the first three steps, it is best to consult with a qualified electrician.

It’s essential to note that other devices connected to the same circuit as your portable air conditioner can also cause an overload that leads to the circuit breaker tripping. Suppose none of these solutions work. In that case, it is advisable to seek the services of an HVAC (Heating Ventilation and Air Conditioning) professional who can conduct more advanced troubleshooting measures.

Fuse needs to be replaced

If you own a Hisense portable air conditioner, it’s important to know that if the fuse needs to be replaced, it’s a sign that the safety feature has been activated. This feature is designed to protect the air conditioning unit from damage and electrical hazards that can be caused by overloads or short circuits. In the event that your air conditioner suddenly shuts off or won’t turn on, there’s a good chance that a blown fuse is the culprit.

Fortunately, you can easily replace a blown fuse yourself by following a few simple steps. First, make sure the power cord is unplugged, and remove any screws necessary to access the back panel cover. Then, locate the fuse using a pair of pliers and remove it. Make sure to replace the old fuse with a new one that has the same amperage rating, which is usually printed on the old fuse. Once the new fuse is in place, replace any screws that were removed and put the back panel cover back on.

It’s important to note that if replacing the fuse doesn’t solve the problem, there may be more serious electrical issues with the air conditioner that require professional attention. To avoid trouble in the future, it’s a good idea to check your air conditioner’s fuses regularly for signs of wear and tear and replace them proactively before they fail. This can save you frustration and protect your air conditioner from long-term damage.

Possible reason why the condenser coils are dirty

Summers can be sweltering, and when an air conditioner suddenly stops cooling, it can become unbearable. One of the possible reasons for an air conditioner to stop cooling is a dirty condenser coil. In this section, we will explore the reasons behind a dirty condenser coil and how it affects the air conditioning system. We will also discuss the best ways to clean the coils and restore the air conditioner’s effectiveness in beating the heat.

Cleaning the coils

The coils in a Hisense portable air conditioner have a crucial role in the cooling process. To maintain optimum performance, it is essential to periodically clean the coils. Dirty or clogged coils impede heat transfer to the outside environment, resulting in decreased efficiency and cooling performance. Here’s a simple three-step guide to cleaning the coils:

  1. Turn off the air conditioner: Before cleaning the coils, unplug your unit from the electrical outlet and wait for it to cool down.
  2. Remove the filter: The filter is located behind or below the front panel of your air conditioner. Gently remove it and set it aside, making sure not to damage or bend any of its components.
  3. Clean the coils: Use a soft-bristled brush or vacuum cleaner to remove any dirt, dust, or debris accumulated on the evaporator and condenser coils. If necessary, make a mild detergent and water solution and apply it using a sponge or cloth. Once you have cleaned both coil sets completely, replace the filter and reattach anything you removed before turning on your Hisense portable air conditioner.

Routine maintenance by regular cleaning of your air conditioner’s coils can help optimize performance, extend lifespan, and minimize energy costs. Your Hisense portable air conditioner will operate efficiently and send chills like a pro with proper care and maintenance. Identifying the root cause of issues with your Hisense air conditioner will ensure optimal operation over time.

Troubleshooting common faults in Hisense portable air conditioners

If you are a proud owner of a Hisense portable air conditioner and it is not cooling, don’t immediately call for an expensive repair. In this section, we’ll discuss some troubleshooting tips for common faults to help you determine if it’s a simple fix before you resort to a service call. We’ll also list some common faults, including the air conditioner not blowing cold air, not cooling sufficiently, and the front display not working, so you can diagnose the problem more efficiently. Let’s get started!

Tips before calling for expensive repairs

One of the most common issues that Hisense portable air conditioner users may encounter is inefficient cooling. To avoid the need for expensive repairs, there are several tips you can follow to troubleshoot the issue and save money.

Firstly, it’s important to ensure that the air conditioner unit is properly sized for the room it’s meant to cool. This means checking the specifications of the unit before purchase to ensure compatibility with the room size. Secondly, proper placement of the unit is essential for maximizing cooling efficiency. It’s best to avoid direct sunlight and position the unit in a location that maximizes airflow.

Another thing to check is whether all vents and doors in the room are open, as this can cause air blockages that reduce efficiency. Regular maintenance and cleaning of the filter and coils can also enhance performance and substantially improve cooling power.

By following these simple steps before calling for expensive repairs, you can find a more cost-effective solution to any issues you encounter with your Hisense portable air conditioner. It’s important to note, however, that air conditioning systems have a limited lifespan, regardless of maintenance efforts. Eventually, they will become less efficient, even with perfect operation.

Remembering these tips can help you avoid common faults associated with the Hisense portable air conditioner and enjoy more efficient cooling for a longer period of time.

9 common faults listed

Portable air conditioners have become a popular choice for cooling rooms, but it’s important to ensure they function efficiently. Here are nine common faults users may face while using Hisense portable air conditioners:

While other unique problems with the unit may exist, they require assistance from professionals.

For any issues with Hisense portable air conditioners, it’s recommended to first try basic troubleshooting tips before seeking expensive repairs. This ensures whether the issue is severe or just a minor fault, saving time and money while ensuring effective cooling during the summer months.

Fault 1: Air conditioner not blowing cold air

Possible issues that may arise when using a Hisense portable air conditioner include the fault of not blowing cold air. If you encounter this issue, don’t panic! There are some troubleshooting measures that you can take before calling for professional service.

To resolve the fault of “air conditioner not blowing cold air”, follow these six steps:

  1. Firstly, double-check that the temperature setting on the unit is set correctly. It should be set lower than the current room temperature.
  2. Next, inspect the unit’s intake vents for obstructions and clear them out.
  3. The air filter may need cleaning or replacement, especially if there is dirt or dust accumulation that may obstruct airflow through the unit.
  4. Inspect the AC refrigerant lines for leaks. Inefficient cooling is often caused by such leaks and will require professional repair.
  5. If none of the above work, ensure that your AC is receiving enough power to operate properly and that no electronic circuit breaker has tripped.
  6. If you have gone through all these troubleshooting measures and have not achieved results, call an HVAC technician for further assistance.

When applying these six steps for fixing the issue of “air conditioner not blowing cold air”, be meticulous and comprehensive in your approach, as any of these six steps could contribute to efficient cooling.

Unique details that have not been covered in previous paragraphs include other possible reasons why an air conditioner may fail to blow cold air, such as faulty fan motors or defective compressors. If you identify any of these issues as a possible source of the problem, or if your AC continues to give warm air, contact an HVAC technician immediately. Electric component failure will need their attention.

It looks like your Hisense AC is giving you a warm welcome instead of cool air! However, with these troubleshooting steps, you should be well on your way to resolving the “cool” culprit and enjoying the refreshing air conditioning that you deserve.

Fault 2: Air conditioner not cooling completely

When a Hisense portable air conditioner is not cooling properly, it could be due to various reasons. One of the most common reasons is a dirty and clogged filter, which prevents sufficient airflow through the unit. Another possible reason is a malfunctioning thermostat that fails to regulate the temperature correctly. If you experience this fault 2: air conditioner not cooling completely, it’s important to troubleshoot the underlying issues promptly to ensure optimal performance of the air conditioning unit.

To resolve this issue, start by ensuring that nothing obstructs the airflow around the unit, such as curtains or furniture. Next, check if there is sufficient refrigerant in the air conditioning system, as low levels may indicate a leak that will require professional attention from an HVAC specialist. Additionally, wiping down any dirt or debris that has collected around the air conditioner is essential, as they can interfere with its ability to perform at maximum efficiency.

If the refrigerant level in the unit is low or leaking, it can cause reduced cooling efficiency, and a damaged compressor or condenser coil can also contribute to this issue. While replacing a faulty part may seem like a good idea for enhancing its performance, it’s always necessary to consult an HVAC technician to determine if this is the right course of action. Therefore, it’s crucial to troubleshoot the problem effectively to determine the most appropriate solution.

Fault 3: Front display not working

If you own a Hisense portable air conditioner, you may encounter the frustrating issue of the front display not working. This fault 3 can stem from a range of issues, such as electrical faults or faulty displays. Consequently, you may find it challenging to monitor or change the air conditioning device’s current settings, which can compromise its efficiency.

To resolve this problem, the advisable course of action is to check for any loose connections between the power source and the display, as this may be the root of the matter. Alternatively, if the display screen is damaged, you will need to replace the problematic component.

If fault 3 with the front display is not linked to loose connections or damaged components, we suggest resetting the unit. Doing this entails unplugging it from the power source and then plugging it back in after some time. Should these measures fail to resolve the issue, you may need to enlist the help of a professional servicing technician to diagnose and repair any underlying complications.


Once the underlying problems are addressed, your Hisense air conditioner can provide the cool and comfortable airflow you need. So, make sure to diagnose and address any issues promptly to ensure the proper functioning of your air conditioner.

FAQs about Hisense Air Conditioner Not Cooling

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Why is my Hisense portable air conditioner not cooling efficiently?

If your Hisense portable air conditioner is not cooling efficiently, there could be several reasons. The unit may not be properly sized for the room or may not be placed in an ideal location. Vents and doors in the room may also be open, allowing cold air to escape. Another possible reason is that the unit needs to be serviced by a professional.

What are some possible reasons why my Hisense portable air conditioner is not receiving enough power to operate properly?

If your Hisense portable air conditioner is not receiving enough power to operate properly, it may not be plugged into a working outlet, the circuit breaker may have been tripped, or the fuse may need to be replaced.

Why are the condenser coils on my Hisense portable air conditioner dirty and how can I clean them?

The condenser coils on your Hisense portable air conditioner may be dirty if they have not been cleaned regularly. To clean them, remove them from the unit and rinse them with warm water, allowing them to dry before reinstalling.

What are some common faults when troubleshooting a Hisense portable air conditioner?

Some common faults when troubleshooting a Hisense portable air conditioner include the unit not blowing cold air, not cooling completely, and the front display not working. Other potential issues may also arise.

How can I troubleshoot my Hisense portable air conditioner before calling for expensive repairs?

You can troubleshoot your Hisense portable air conditioner by checking the temperature setting, fan, exhaust hose, and compressor. There are also several video guides available online to help you troubleshoot your unit before calling for repairs.

Why is it important to properly maintain my Hisense portable air conditioner?

Proper maintenance of your Hisense portable air conditioner is important to ensure that it functions efficiently and effectively. Neglecting to maintain your unit may result in poor performance, increased energy consumption, and potential damage to the unit.

SmartHomeBit Staff