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Why is my air conditioner no longer cooling?

By Graziella Fiorini

With the summer heat settling in, there’s nothing worse than realizing your air conditioning unit isn’t working properly. Are you wondering why your air conditioner is no longer cooling? Why has its airflow become so weak and inefficient? In this article, I will explain the common reasons for this issue and emphasize the importance of regular/annual AC maintenance by a professional HVAC technician to prevent these problems.

 

The importance of regular air conditioning maintenance

Regular maintenance plan and cleaning of your outdoor condenser unit and wall-mounted heat pump-air conditioner system are essential to ensure its proper functioning and extend its lifespan. Here’s why:

1. Clogged air filter:

The air filter in your air conditioning system is designed to prevent mold and aglae growth from entering the system. However, if you don’t clean or replace this filter regularly, it can become clogged, significantly reducing your device’s efficiency. A dirty air filtration system blocks the flow of fresh air, forcing the system to work harder, which can lead to a decrease in cooling capacity.

Learn how you can clean your filters yourself.

2. Dirty evaporator and condenser coils

The evaporator and condenser coils play a crucial role in the cooling process. Over time, they can accumulate dirt buildup and debris. As a result, your unit will consume more energy bills while struggling with heat transfer that can increase your air conditioning bill. Regular cleaning of the evaporator coil is necessary to maintain optimal performance of your air conditioner.

3. Obstruction of the outdoor unit

The outdoor unit of your air conditioning system, both exterior and interior, must be free from any obstructions to allow for proper airflow and sufficient air circulation. If it is blocked by leaves, branches, or other debris, it can result in a clogged outdoor AC condenser unit or harm the heat transfer, which is a key component of your system. Be sure to keep the area around your outdoor unit clear and clean to ensure optimal performance. This will guarantee comfortably cool air in the summer and efficient wall heating in the winter. If in doubt, consult a quick guide to verify that the airflow is not insufficient and optimize your system’s performance.

 

How often should you clean your air conditioner?

It is recommended to clean or replace the air filter every month during the warm season. The evaporator and condenser coils, as well as the outdoor unit, should be checked and cleaned at least once a year by a professional to ensure optimal performance, prevent breakdowns during the heat wave, and maintain the performance of your heating devices during winter. Contact us and schedule your cleaning!

 

Although regular cleaning is crucial, other factors can also affect the performance of your air conditioner:

4. Low refrigerant levels

Refrigerant is essential for the cooling process. If the refrigerant level is low, it could be due to leaking ducts. A qualified HVAC technician can check the refrigerant level and repair any water leaking to restore your system’s efficiency.

5. Thermostat problems 

A poorly calibrated or faulty thermostat can also cause cooling problems. Ensure your thermostat is set correctly and functioning properly for optimal energy efficiency.

6. Electrical issues

Electrical components of your air conditioner, such as capacitors and contactors, can also cause malfunctions. If you encounter any mechanical issue, it is recommended to call an HVAC professional technician for diagnosis and repairs.

 

What can we conclude?

A reversible air conditioner that no longer cools can be a real nightmare during the summer months. By focusing on regular cleaning and maintenance of your ventilation system, you can prevent most common issues and ensure optimal performance. If, despite your efforts, your air conditioner continues to experience problems, don’t hesitate to call a professional for an accurate diagnosis.

 

 

 

 

Also read: Hidden dangers: 3 reasons to clean your ducts and ventilation systems!

Hidden dangers: 3 reasons to clean your ducts and ventilation systems!

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