The Most Common Causes of Air Conditioning Breakdowns – 2023
air conditioning breakdowns can be caused by various factors such as a dirty filter, refrigerant leaks, failed thermostats, lack of maintenance, and more. Read more to reduce your air conditioning breakdowns.

Air conditioning breakdown refers to a situation where an air conditioning unit stops working properly or entirely. This could be due to various reasons, including lack of maintenance, electrical issues, or problems with the refrigerant. An air conditioning breakdown can cause discomfort in a building, especially during hot or cold weather, and can also lead to high repair costs or the need for a complete replacement of the unit. Regular maintenance and prompt repairs can help prevent air conditioning breakdowns and keep the unit functioning efficiently.

We’ll discuss the following in this article:

Causes of Air Conditioning Breakdowns

There are several causes of air conditioning breakdown, including failure of the thermostat, unclean HVAC filters, leaks of refrigerants, lack of maintenance, failed electric control, sensor issues, drainage issues, and damaged capacitor.

Failure of the thermostat

To ensure that your heating and cooling equipment functions correctly, it’s crucial to have a well-functioning thermostat that controls your HVAC system. To ensure this, check the thermostat and ensure that it’s turned on and set to “cool” mode, and verify the batteries (if applicable) are not dead.

Unclean HVAC filter

A dirty air conditioner filter is a common cause of an AC system freezing up or failing to cool. HVAC filters typically have a lifespan of 30 days. However, during hot summer months when the system runs longer cycles, the filter may need to be checked or replaced more frequently, even before the 30-day mark.

Leaks of Refrigerants

When an air conditioner has low refrigerant, it can be due to an undercharged installation or leakage. It is important to note that adding more refrigerant is not a solution if there is a leak. A qualified technician should repair any leaks, test the fix, and refill the system with the correct amount of refrigerant. Optimal performance and efficiency of your air conditioner can only be achieved when the refrigerant charge precisely matches the manufacturer’s specification without being overcharged or undercharged. Refrigerant leaks can also cause harm to the environment.

Lack of Maintenance

Neglecting to clean air filters and coils can cause your air conditioner to malfunction, leading to premature failure of the compressor or fans. It’s important to maintain these components to ensure your air conditioner works effectively and efficiently.

Failed Electric Control

To ensure the proper functioning of an air conditioning system, it is essential to regularly inspect the compressor and fan controls, especially if the system is oversized and turns on and off frequently. These controls are prone to wear and tear, which may lead to premature failure. In addition, corrosion of wires and terminals is a common issue that can impact the electrical connections and contacts in many systems, making it crucial to have them checked during a professional service call.

Sensor Issues

To ensure that a room air conditioner functions properly, it’s important to check its thermostat sensor. This sensor is usually located behind the control panel and measures the temperature of the air entering the evaporative coil. If the sensor is displaced, it could cause the air conditioner to cycle continuously or behave unpredictably. It’s best to keep the sensor close to the coil but not in direct contact with it. You can adjust its position by gently bending the wire that holds it in place.

Drainage Issues

To ensure the proper functioning of your room air conditioner during humid weather conditions, it is essential to check if the condensate drain is clear and draining correctly. In case of improper leveling during installation, the room air conditioners may fail to drain effectively.

Burned-out or Damaged Contactor

To ensure that your HVAC system is running properly, the contactor, which supplies voltage to your compressor and fan motor, needs to be functioning correctly. Over time, the contactor may become burnt or damaged, making it difficult for the correct voltage to power the compressor and fan motor. This can result in your system not running properly or not running at all. Therefore, it’s important to have a professional technician check the contractor during regular maintenance to prevent any issues.

Damaged Capacitor

In a cooling and heating system, the motors that power the compressor and fan motors are powered by the capacitor. The start capacitor gives a boost to start the motor, while the run capacitor sends a sequence of boosts to keep it running. If the capacitor is weak or faulty, the air conditioning unit may not operate properly, or it may not run at all, causing inefficiency.

If you are facing such Air Conditioning Breakdowns, don’t hesitate to Call us: 0800 689 1726 or Contact Us we are here to Repair your Air conditioner Breakdowns. Our team of experts is ready to help you diagnose and fix any issues you may be experiencing, ensuring that your system operates at its best and providing you with peace of mind.

Risks of not Servicing Air Conditioners

Failing to maintain your air conditioning system can result in various risks, including decreased efficiency and increased energy bills. Dirty air filters and coils can cause your system to work harder than necessary, leading to premature wear and tear on the components and ultimately reducing the lifespan of your system. Moreover, a poorly maintained air conditioning system can lead to poor air quality and contribute to the spread of allergies and respiratory illnesses. Neglecting to schedule regular maintenance can also cause small problems to go undetected and become more severe over time, leading to costly repairs or even system failure. Therefore, it is crucial to keep up with regular maintenance and promptly address any issues to keep your air conditioning system running smoothly and efficiently. We’ve compiled a list of some of the risks that can result from neglecting to maintain your air conditioning.

Risk of Breakdown

Regular annual servicing of your air conditioning unit is crucial to ensure that any issues are detected and fixed promptly, preventing multiple problems from building up. With professional technicians checking your unit for any problems, the likelihood of your system breaking down is greatly reduced. Breakdowns can cause inconvenience and disrupt work, leading to wasted time and the need for alternative arrangements. Repairing or replacing a broken air conditioning unit can also be expensive. Investing in regular servicing is a more cost-effective solution and can help extend the lifespan of your unit. Don’t wait for a breakdown, schedule regular maintenance to keep your system running smoothly.

Elevated Energy Costs

Delaying the maintenance of your air conditioning unit can result in it having to work harder to maintain a comfortable temperature in your building. When the system is not regularly serviced, it can accumulate problems or bacteria, causing it to consume more energy while delivering less output. By scheduling annual servicing for your air conditioning unit, you can ensure that it is working at peak efficiency, leading to lower energy bills in the long run.

Health Issues

Neglecting regular cleaning of your air conditioning unit can result in a buildup of dust, dirt, and allergenic particles that may circulate around your building, leading to unhygienic and potentially hazardous conditions for those working in the area. People exposed to such contaminated air may suffer from allergies, sinusitis, or asthma. However, failing to service your air conditioning unit for an extended period can lead to even more severe problems. Legionnaire’s disease, caused by contaminated water droplets that can be dispersed by airflow, is one such problem. This disease has flu-like symptoms, and for around 15% of those infected, it can be fatal. Regular maintenance and cleaning of your air conditioning unit can help prevent such issues and ensure a safe and healthy working environment.

Reduced lifespan of the Unit

Without proper maintenance, the lifespan of an air conditioning unit can be significantly reduced. This can result in the need for costly replacements or repairs, which could have been avoided with regular servicing.

Reduced Efficiency

Over time, air conditioning units can accumulate dirt and debris that make it difficult for the unit to function efficiently. This can lead to increased energy bills and a reduced lifespan for the system.

How to Repair Air Conditioners Breakdown

If your air conditioner is experiencing a breakdown, there are several things you can do to address the issue, including checking and replacing filters, inspecting electrical connections, monitoring refrigerant levels, clearing the condensate drain, analyzing and replacing damaged components, addressing compressor or fan motor issues, and cleaning condenser coils. By taking these steps, you can help repair your air conditioner and ensure it’s running smoothly. Describe all points below:

Check and Replace Filters

Dirty air filters can cause the system to work harder and consume more energy, resulting in breakdowns. Replacing them regularly can help prevent such problems.

Check Electrical Connections

Loose or corroded electrical connections can prevent the unit from functioning properly. Inspect and tighten all connections during regular servicing.

Check Refrigerant Levels

Low refrigerant levels can cause the unit to malfunction and may indicate a leak in the system. A professional should be called to locate and repair any leaks and refill refrigerant levels.

Analyse and Replace any Damaged Components

Worn or damaged parts such as belts, bearings, and motors can cause the system to fail. These should be inspected and replaced as needed during regular servicing.

Address Compressor or Fan Motor Issues

The compressor and fan motor are essential components of the system, and issues with these parts can cause breakdowns. A professional should be called to diagnose and repair any problems with these parts.

Clean Condenser Coils

Over time, dirt and debris can build up on the condenser coils, reducing the system’s efficiency. Regular cleaning can help prevent breakdowns.

If you are experiencing an Air Conditioning Breakdown, it’s essential to contact a professional repair service as soon as possible. Attempting to fix the issue yourself can lead to further damage and potentially harm yourself or your equipment. Moreover, you can easily Call us: 0800 689 1726 or Contact Us through our website if you are facing such problems we are here to provide you with repair services.


In this article, we have discussed that air conditioning breakdowns can be caused by various factors such as a dirty filter, refrigerant leaks, failed thermostats, lack of maintenance, and more. Neglecting to maintain your air conditioning system can lead to decreased efficiency, increased energy bills, poor air quality, and costly repairs or even system failure. It is crucial to keep up with regular maintenance and promptly address any issues to keep your air conditioning system running smoothly and efficiently. Regular annual servicing of your air conditioning unit can greatly reduce the likelihood of breakdowns, extend the lifespan of your unit, and save you money in the long run. Thaw Ltd is here to help you in repairing your Breakdowns feel free to Contact Us.