When a Gree air conditioner displays the “H7” error code, it is an indication that something is wrong with the compressor in the unit.
The compressor is responsible for moving around the refrigerant and air within your air conditioner (AC) and is extremely important.
If your Gree air conditioner is showing the error code “H7”, this indicates that there is a problem with the compressor, which a professional technician will have to take a look at. In the meantime, you can reset your unit and try to maintain your compressor.
What does the compressor do in an air conditioner?
You may realise that your air conditioner has many moving parts, which allow the unit to cool down the air in your space. One of the most critical of these components is the compressor.
The compressor is sometimes referred to as the heart or the workhorse of an air conditioner, because this component is responsible for moving the air into the refrigerant so that it can be cooled down, as well as for moving the hot refrigerant and cooling it down again.
So the compressor plays a dual role in the air conditioning process:
| Compression of Refrigerant | Circulation and Cooling |
| The compressor pressurizes and compresses low-pressure, low-temperature refrigerant vapor from the evaporator coils, preparing it for the next stage of the cooling cycle. | Compressed refrigerant transforms into a high-pressure, high-temperature gas. The compressor propels it towards condenser coils, releasing heat into the air, causing the refrigerant to revert to a liquid state and expel absorbed heat from indoor air. |
Gree air conditioner error code H7
As a result of how important the compressor is in any air conditioner, most air conditioners cannot function correctly or at all if the compressor is not working as it should. Gree air conditioners are no exception to this rule.
If your Gree air conditioner is displaying an “H7” error code, this is an indication that there is a problem with the “compressor loss step protection” in Gree inverter air conditioners and a “compressor de-synchronized malfunction” in some Gree mini-split AC models.
When this error is displayed on your Gree air conditioner, your first step should be to find your owner’s manual to confirm what the “H7” error code means for your specific model.
The H7 error codes usually signify some kind of issue with the compressor of your unit and your air conditioner will not function as it should until this error message is cleared.
You should reset your Gree air conditioner before you take any other steps to try to clear this error code, just to ensure that the displayed error was not an error itself.
This is unfortunate, because compressor errors and troubleshooting should be done by professionals, since there are complex electrical systems at play and if you do not know what to look for and how to fix it, you can end up causing more damage, instead of actually fixing the issue.
However, there are some steps you can take by yourself to prevent compressor failure and to keep your compressor working optimally for longer.
How to reset your Gree air conditioner
When any error code prevents your Gree air conditioner from working as it should, you should always try to reset the unit to see if the “H7” error code disappears.
If the system was malfunctioning when it displayed the “H7” error code, it will be cleared after the reset.
If you are lucky your Gree air conditioner model will have a “Reset” button on the remote control or display unit, which can be accessed with a small screwdriver.
However, if your model does not have this “Reset” button, you can reset the unit by turning it off at the breaker and waiting a few minutes before turning it back on again.
If the “H7” error code is still displayed even after the reset, you need to call a professional, as there is definitely something wrong with your compressor.
Why you should check your refrigerant levels and power to your compressor regularly
Regularly checking both the power supply to your compressor and the refrigerant levels is essential to prevent common issues that can lead to compressor failure.
The two primary culprits for such failures are power supply problems and insufficient refrigerant levels, this is why they should be regularly checked.
These routine checks serve as proactive measures to maintain the health and longevity of your compressor:
| Power supply check | Refrigerant level checks |
| 1. Regularly inspect the wires and connections around your compressor. | 1. Periodically assess the refrigerant levels in your air conditioning system. |
| 2. Ensure that all electrical components are secure and free from damage. | 2. Look for signs of refrigerant leaks, such as oily residue or hissing sounds. |
| 3. Address any issues with the power supply promptly to prevent operational disruptions. | 3. Address any leaks promptly to maintain the proper refrigerant balance and prevent unnecessary strain on the compressor. |
By incorporating these checks into your regular maintenance routine, you not only reduce the risk of compressor failure but also contribute to the overall efficiency of your air conditioning system.
Proactive measures can extend the lifespan of your compressor, ensuring reliable performance and minimizing the likelihood of expensive repairs in the long run.
Why you should keep your coils clean and compressor well-oiled
Maintaining the cleanliness of your coils and ensuring proper lubrication of your compressor are essential practices to uphold the efficiency and longevity of your Gree air conditioner.
Coil cleaning
When your Gree air conditioner operates over an extended period, dirt and dust particles tend to accumulate on the coils. This buildup can compromise the efficiency of the cooling process.
You can clean these coils once in a season using a mould and mildew remover or a specialised coil cleaner with a toothbrush or a soft brush.
Regular coil cleaning is essential for optimizing your air conditioning system’s performance, enhancing efficiency through improved heat exchange, preventing overworking of the compressor, and contributing to better indoor air quality by minimizing dust and allergen circulation.
Compressor lubrication
You can also oil your compressor, using oil lubricant. Regular lubrication of the compressor is crucial for three key reasons:
- it reduces friction between moving parts, thereby preventing wear and tear
- contributes to the longevity of the compressor
- ensures optimal performance, maintaining consistent cooling efficiency.
However, incorrect application or using the wrong type of oil can lead to complications and potentially damage other components of the air conditioning system.
Therefore, it is advisable to follow manufacturer guidelines and, if uncertain, seek professional assistance to ensure proper lubrication without adverse effects on the unit.
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