Air conditioning is an essential device in households, and we use this in our day-to-day usage. But what if you face a problem with your Air Conditioner? If you are facing the problem of the AC not cooling below 75, then this is a common problem faced by many households for not maintaining the AC at regular intervals.

You may face this problem because of many factors in the Air Conditioner. In this blog, we will look at some of the most common reasons why your AC is not cooling below 75, as well as some tips on how to fix the problem. Whether you are facing this issue on the new device or the old unit, we will guide you on how you can solve this issue. 

Troubleshooting Air Conditioner Not Cooling Below 75 or 80 Degrees

Fix Air Conditioner AC Not Cooling Below 75 or 80 Degrees

Air Conditioners can have this problem for many reasons, which we have listed below. If you are also facing the issue, you can resolve this problem after having a look at the solutions. AC not cooling below 75 issues can be frustrating if it is not fixed within the time limit, especially in the hot weather. Let’s dive into it and see how to solve this problem.

1. Condenser Coil is Dirty

The Condenser coil ensures that heating inside the refrigerant in AC is removed. If the Condenser coil becomes dirty, then AC is not cooling below 75 properly. To fix this issue, you need to clean the Condenser coil properly with the help of a brush and then clean it properly. After cleaning the Condenser coil, check again if the problem is resolved.

If you don’t want to face this problem in the future, you should clean the Condenser coil at regular intervals. It’s the common practice that you should do to avoid this type of situation. If the  Condenser coil has any kind of defect, then it may also be required to replace.

2. Drain Line is Blocked

The drain line plays an important role and is responsible for removing the water from the evaporator coil. It is also important because if the water is not cleaned from the evaporator coil, it may freeze and be blocked or damaged.  If the line is blocked, then it may collect water and freeze, which will result in damage to the evaporator coil.

To fix this problem, you need to ensure that the eater is not collected in the evaporator coil and not freezing. If so, you must clean the blockage for the machine’s proper functioning. You can also do this process at regular intervals. After all, this checks if it is cooling below 75.

3. Airflow in AC

Another potential reason for this problem is that if there is not adequate airflow in your place, then it may also result in not achieving the temperature which is wanted from the device. If you want to fix this problem, you also need to make sure that there is enough airflow in your home, which will help you to resolve the problem related to the airflow.

4. Thermostat Wiring Issue

In most situations. This problem can also cause AC not cooling below 75, where the thermostat wiring is improper and has any fault. If the thermostat’s wiring is incorrect, it may also result in other big problems that may be challenging to resolve.


To fix this issue, you need to remove the Thermostat from its place and check all the wiring. And if you have found any fault in the wiring, you should fix this as soon as possible. If you are having a problem with the thermostat. You can also refer to the manual you received with the device. After fixing this, check for the temperature of the AC.

5. Leakage in Refrigerant

You need to ensure that the air is available inside the room and cools down. If there is any kind of leakage in the Refrigerant, it may not cool below 75 degrees. If any kind of fault is on the AC’s coil, there may be a chance that there is a leakage in the refrigerant. You need to fix this to solve this problem. 

6. Fault in Compressor

One of the essential parts of the Device which control the entire machine. If there is any kind of fault in this part, it can hamper the proper AC functioning. In this situation, you need to fix this problem. You may face a problem with the compressor because of Low refrigerant. If there is a fault in the wire and overheating problem. It might be difficult for an ordinary person to fix this. In this case, you may take the help of an expert in this field. 

7. Battery Issue in Thermostat 

The thermostat battery can also result in the cause of the problem of the AC not cooling below 75. If your thermostat has a low-voltage battery, it may hamper the machine’s cooling. If there is any fault in the battery, you need to replace the battery with a new one to eliminate this problem. 

8. Clogged or Dirty Filters

When there is a blockage in the filter or has any kind of first in it, it may also start affecting the cooling of the AC. In this case, you need to perform a simple process. Find out the filter and clean this filter properly with the help of a brush. After performing this process, start the device again and check the temperature of the Air Conditioner.


Take the help of the above points to resolve the issue related to the AC not cooling below 75. This problem arises because of the factors mentioned above, many of which are related to the issue of not cleaning. Follow all the mentioned reasons to resolve this problem as early as possible to enjoy the Air Conditioner. You can resolve some of the issues mentioned above by yourself. At the same point, you may need the help of a technician or an expert. 

Frequently Asked Questions ( FAQs)

1. How often should I replace my air filter?

It’s recommended to replace your air filter every 1-3 months, depending on usage and the level of air pollution in your area.

2. Can a refrigerant leak cause my AC to not cool below 75 degrees?

Yes, a refrigerant leak can cause your AC to not cool effectively and can also cause damage to the system if not repaired.

3. Is it normal for an older AC unit to not cool below 75 degrees?

It is not normal, but it is possible for an older AC unit not to cool as effectively as a newer unit. As the unit ages, components can wear out and need to be replaced, which can cause the unit not to cool properly.


He is a content writer for the last 2 years and working as a freelance content writer in different niches, especially in the field of technology and finance. Started content writing as a hobby and now this has become my profession and doing full-time content writing.


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