The Ultimate Guide to Aircon Maintenance: Tips and Tricks for a Longer-Lasting AC System

A technician wearing a blue uniform inspects an air conditioning unit while holding a clipboard, demonstrating the quality of aircon maintenance services Singapore is known for.

The Ultimate Guide to Aircon Maintenance: Tips and Tricks for a Longer-Lasting AC System

In Singapore’s hot tropical weather, air conditioners are an essential appliance in almost every home and office. Aircon maintenance and servicing are crucial for consistent performance, dependability, and durability. Consistent aircon servicing keeps your indoor space healthy and comfortable and minimises the risk of AC malfunctions in your Singapore-based home or office.


Neglecting regular air conditioner maintenance can be far-reaching and costly, affecting not only the system’s performance but also your comfort, health, and finances. Many homeowners and office managers often overlook the importance of routine servicing, assuming that their air conditioners will continue to function optimally without proper care. 


However, statistics show otherwise, showing that the lack of AC maintenance can lead to reduced system life and increased energy bills. Statistical evidence shows that dirty filters can cause a 20-30% increase in energy consumption due to the aircon working harder to maintain airflow. Neglected air conditioners will also lead to poor indoor air quality, exacerbating allergy symptoms, asthma attacks, and various respiratory problems.


Thus, it is important to maintain AC maintenance to extend the life of your system and ensure optimal performance.

Understanding Your Aircon System

Before scheduling a check-up from an aircon maintenance and repair company in Singapore, you need to understand your air-conditioner system first: 

Exploring the Various Types of Air Conditioning Systems

Image of a split air conditioning unit showing both the indoor and outdoor components, with the indoor unit displaying a temperature of 18°C. Ideal for those considering an aircon replacement in Singapore.

There are several types of air conditioning systems available, each with its own unique features and benefits.

Window Air Conditioner

These self-contained air conditioners are designed to fit into a window or a hole in the wall. They are relatively inexpensive, easy to install, and ideal for cooling small to medium-sized rooms. However, they can be noisy and may not be as energy-efficient as other options.

Split Systems (Wall-Hung or Multi-Head)

Split air conditioners consist of an outdoor compressor unit and one or more indoor air handling units. They are quieter, more energy-efficient, and offer more flexibility in terms of installation compared to window units. Split systems are suitable for cooling one or multiple rooms and are a popular choice for residential and small commercial spaces. Though, if the outdoor unit malfunctions, the indoor units will also be affected. 

Central Air Conditioners 

Central aircon systems are designed to cool an entire building or a large space. These systems provide consistent cooling, improved air quality, and the convenience of controlling the temperature throughout the entire space from a single point. However, they are more expensive to install and maintain compared to other options.

Portable Air Conditioners

Portable air conditioners are freestanding units designed to cool a single room and can be easily moved from one space to another. They work by drawing in warm air, cooling it, and exhausting the heat through a flexible hose that is typically vented through a window. These AC units are easy to install and can be conveniently moved from room to room. However, they are noisier and less energy-efficient when measured against other choices. 

Understanding the Key Components of an Air Conditioning System

An air conditioning system includes numerous essential parts that function together to cool and dehumidify the air in your home or office.


The compressor is the heart of the air conditioning system. It pressurises the refrigerant gas, raising its temperature and allowing it to flow through the system.

Condenser coil

The condenser coil is responsible for releasing the heat from the hot refrigerant gas to the outside air. It releases the heat from the refrigerant gas to the outside air, allowing it to cool down and return to its liquid state.

Expansion Valve

The high-pressure liquid refrigerant passes through an expansion valve, which reduces its pressure and temperature. This process allows the refrigerant to absorb heat more effectively in the next stage.

Evaporator Coil

The cold, low-pressure liquid refrigerant enters the evaporator coil, which is located in the indoor unit. As warm indoor air passes over the coil, the refrigerant absorbs heat from the air, cooling it in the process. The refrigerant then evaporates back into a gas and returns to the compressor to start the cycle again. 

Blower Fan 

The blower fan is responsible for circulating the cooled air throughout the room or building via ducts or directly from the unit. It ensures that the cooled air is distributed evenly and efficiently throughout the space. 

Know Your Air Conditioner: Specifications and Manufacturer’s Guidelines Matter

Understanding your air conditioning system’s specifications and following the manufacturer’s recommendations help ensure optimal performance and longevity. 


Manufacturers provide detailed specifications and guidelines for each air conditioning model, which include important information such as the unit’s cooling capacity, energy efficiency rating, refrigerant type, and ideal operating conditions. These specifications are designed to optimise AC performance while reducing energy consumption and operating costs.


Following the manufacturer’s recommendations for regular AC cleaning services also can prevent common issues and increase the lifespan of your system. 


Moreover, understanding your unit’s specifications can help you identify potential problems early and communicate effectively with HVAC technicians when needed, saving you time and money in the long run.


Adhering to your air conditioner’s specifications and manufacturer’s guidelines ensures efficient operation, comfort, and long-term reliability.

Regular Maintenance Tasks

To maintain your air conditioner and ensure its lifespan, regular maintenance tasks are necessary:

Cleaning The Air Filters 

A person in a blue uniform and cap is providing an ac cleaning service by meticulously cleaning a wall-mounted air conditioner filter.

Air filters are essential components of air conditioning systems that are designed to trap and remove airborne particles from the air that circulates through the unit. By capturing these contaminants, air filters maintain good indoor air quality and protect the AC’s components from damage caused by accumulation of debris. 


It is recommended to check your AC’s air filters every month. If you stay in a dusty environment or have pets in your home, filters should be cleaned more frequently within two to three weeks. However, it is always best to refer to the manufacturer’s guidelines for specific recommendations on cleaning and replacement schedules.


Here are tips to help you clean your air conditioner’s filters effectively:


Follow the unit’s manual for proper filter removal and cleaning procedures. Then, use a soft brush, vacuum cleaner, or lukewarm water to clean the filter gently. 

Allow the filter to dry completely before reinstalling to prevent damage. Replace worn or damaged filters with new ones that meet the manufacturer’s specifications. 

Cleaning the Condenser Coil 

The condenser coil releases heat absorbed from the indoor environment into the outside air. Over time, condenser coils can accumulate dirt, dust, and debris, which can impede heat transfer, decrease overall efficiency and cause the system to work harder, leading to higher utility bills. 


Condenser coils should be cleaned yearly for optimal performance. If the unit is exposed to high levels of dust, foliage, or other debris that can accumulate quickly, professional cleaning is necessary every 6 months at least. 


Here are tips to help you clean your condenser coils: 


Turn off the power to the air conditioner before cleaning the coils. Remove any debris, such as leaves or twigs, from around the condenser unit. 


Use a coil cleaning brush, coil cleaning solution, or a mixture of mild detergent and water to gently clean the coils. Rinse the coils thoroughly with a low-pressure water spray, taking care not to bend or damage the delicate fins. Towel off or allow the coils to dry completely before restoring power to the unit. 

Cleaning the Evaporator Coil 

The evaporator coil is located in the indoor unit. It absorbs heat from the indoor air, cooling it down, and dehumidifying it before redistributing the cooled air back into the room. Over time, evaporator coils can accumulate dirt, dust, and mould, which can hinder the system’s cooling efficiency and compromise indoor air quality.


It’s best to clean the AC’s evaporator coils annually and inspect them regularly if the unit is exposed to high humidity or prone to mould growth. 


Here are tips to help you clean your evaporator coils


Ensure the air conditioner is turned off before cleaning the coils. Locate the access panel to the evaporator coil and remove it to expose the coils. Spray the coils with a solution of mild detergent and water to loosen the debris. 


Use a soft brush to gently remove residual dirt and debris, making sure to avoid the fins as they can easily bend. Once the area is wiped dry with a clean cloth, replace the access panel and ensure it is safely fastened. 

Checking And Replacing Faulty Parts

Over time, components such as fan blades, seals, and capacitors can deteriorate due to normal wear and tear, leading to reduced efficiency, increased energy consumption, and potential system breakdowns. These parts need to be inspected annually and replaced as needed, based on the manufacturer’s recommendations and the component’s condition. For hard-to-access or complex components, it’s best to have a trained HVAC technician perform the inspections. 

The Key To Reliable And Efficient Air Conditioning: Regular Professional Maintenance

Regular professional maintenance is essential for keeping your air conditioning system running efficiently, reliably, and safely. Scheduling annual tune-ups with a qualified HVAC technician can help prevent breakdowns, extend the unit’s lifespan, and ensure optimal performance. 


In Singapore, aircon cleaning services usually offer an AC chemical wash options, which involves the application of specially formulated chemicals to thoroughly remove dirt, mould, grime and fungus that have built up in the system’s parts. 


By investing in regular professional maintenance, you can save money on energy costs, avoid costly repairs, and enjoy the peace of mind that comes with knowing your air conditioner is in the hands of skilled experts.

Advanced Maintenance Techniques

Checking And Adjusting The Refrigerant Levels 

Refrigerants are the chemical compounds used in air conditioning systems to absorb and release heat, cooling and humidifying the air. The ideal refrigerant level specified by the manufacturer ensures balanced system operation for optimal energy usage and longevity.

How To Check Refrigerant Levels 

Follow these steps to check your air conditioner refrigerant levels

  1. Begin by shutting off your air conditioner and identifying the location of the service valves.
  2. Next, connect the manifold gauge set to the service valves securely.
  3. Switch on your air conditioner and monitor the pressure readings. Most systems operate optimally with pressures ranging from 30 to 40 PSI, although some units may have different requirements.
  4. To determine the necessary amount of refrigerant based on temperature and pressure, use these guidelines:
  5. When the temperature rises by 1 degree Fahrenheit above 68°F (20°C), introduce an additional 2 ounces (60 grams) of R22 refrigerant for each ton of cooling capacity.
  6. If the pressure falls below 30 PSI under maximum load conditions, with no outside air entering through louvres, grilles, or open windows, add 1 ounce (30 grams) of R22 refrigerant per ton of cooling capacity for every 1 PSI drop.


If you are unsure about any part of the process or lack the necessary experience, it is highly recommended that you seek the assistance of a qualified HVAC technician. 

How To Adjust Refrigerant Levels

Adjusting refrigerant levels is a crucial aspect of maintaining an air conditioning system’s efficiency. When performing this step, the proper procedures must be employed and the appropriate tools must be used when assessing and modifying refrigerant levels. 


Here are the following steps to adjust refrigerant levels for optimal efficiency:

  1. Begin by analysing the system’s superheat and subcooling values. These measurements will provide insight into whether the system is undercharged or overcharged with refrigerant.
  2. If the system is undercharged, add refrigerant until it reaches the proper levels. Be careful not to overcharge the system. If the system is overcharged, remove the excess refrigerant to achieve the correct balance.
  3. Once the refrigerant levels have been adjusted, closely monitor the air conditioning system’s cooling performance and pressure readings. Check the pressure readings against the manufacturer’s guidelines to ensure the system is working properly.

Inspecting And Cleaning Compressor And Fan Motor

The compressor and fan motor are crucial components of an air conditioning system. The compressor plays a vital role in circulating the refrigerant, which enables the cooling process. The fan motor, in turn, helps distribute the cooled air throughout the home. 

How To Inspect And Clean Compressor And Fan Motor

Here are the steps to inspect and clean the air conditioner compressor and fan motor:


  1. Before starting any maintenance work, always turn off the power to your air conditioning unit at the main circuit breaker to ensure your safety.
  2. Locate the compressor and fan motor. The compressor is typically located in the outdoor unit, while the fan motor can be found in both the indoor and outdoor units.
  3. Clean the surrounding area around the compressor and fan motor using a brush or vacuum cleaner.
  4. Look for any signs of damage, leaks, or excessive wear. If you notice any issues or are unsure about the condition of the compressor, contact a professional HVAC technician.
  5. Carefully clean the fan motor and blades using a soft brush or cloth. Remove any dirt or debris that may have accumulated on the surfaces. If the fan blades are bent or damaged, have them replaced by a professional.
  6. If the fan motor has oil ports, add a few drops of lightweight oil to lubricate the bearings. Be careful not to over-lubricate, as this can cause damage to the motor.
  7. Once you have completed the inspection and cleaning process, reassemble any removed parts and restore power to the air conditioning unit.


Regular servicing helps maintain the performance and prolong the life of your air conditioner’s compressor and fan motor. 

Inspecting And Cleaning The Condenser And Evaporator Coils

The condenser and evaporator coils are essential components of your air conditioning system. The condenser coils, located in the outdoor unit, are responsible for releasing the heat absorbed from your home into the outside air. The evaporator coils, found in the indoor unit, absorb heat from the air inside your home, cooling it down. 


The accumulation of dirt and debris over time can hinder their ability to transfer heat effectively. To keep your air conditioner running smoothly, it’s important to inspect and clean the condenser and evaporator coils regularly.

How To Inspect And Clean The Condenser And Evaporator Coils

Here are the steps to inspect and clean the the condenser and evaporator coils: 

  1. Before you begin, turn the power to your air conditioning system off at the main circuit breaker to prevent any electrical hazards.
  2. Locate the coils. The condenser coils are housed in the outdoor unit, while the evaporator coils are located in the indoor unit, typically above the furnace or air handler.
  3. Before starting to clean, inspect the coils for any damage. If you notice any significant damage, contact a professional HVAC technician for repairs.
  4. Remove any debris around the outdoor unit to maintain proper airflow using a soft brush or a vacuum with a soft brush attachment. 
  5. Apply a coil cleaning solution, or a mixture made from mild detergent and warm water on the coils and let it sit for a few minutes before rinsing it off with a low-pressure hose or water sprayer (if necessary). 
  6. If you notice any bent fins on the coils, use a fin comb to gently straighten them out for proper airflow and heat transfer.
  7. After cleaning and inspecting the coils, put everything back together and turn the power back on.

Inspecting And Replacing Worn-Out Seals And Gaskets

Seals and gaskets prevent air leaks and maintain proper refrigerant flow. Over time, these components can become worn out, brittle, or damaged, leading to reduced performance and potential energy waste. 


A main tell-tale sign that the air conditioner gasket and seal need to be replaced or repaired is fluid leakage. Regularly inspecting and replacing worn-out seals and gaskets is essential to keep your air conditioner running smoothly and efficiently. 

How To Inspect And Replace Worn-Out Seals And Gaskets

To inspect and replace worn-out seals and gaskets, follow these steps:


  1. Before beginning any maintenance work, always turn off the power to your air conditioning unit at the main circuit breaker. 
  2. Inspect the seals and gaskets for cracks, brittleness, or any signs of air or refrigerant leaks.
  3. Any worn-out or damaged seals or gaskets must be carefully removed using a flathead screwdriver or pliers. Be gentle to avoid damaging the surrounding surfaces.
  4. Before installing new seals and gaskets, clean the surface area where they will be placed. Remove any dirt, debris, or old sealant material to ensure a proper fit and seal.
  5. Replace the old seals and gaskets with new ones that are specifically designed for your air conditioning unit. Make sure they are properly sized and positioned to create an airtight seal.
  6. After you have replaced all the necessary seals and gaskets, reassemble any parts you removed and restore power to your air conditioning unit.

Why Using the Right Tools Matters


Using the correct tools and equipment is important in air conditioner maintenance and servicing. 

They ensure safety by preventing accidents and injuries, but it also allows for accurate measurements and adjustments. Investing in quality tools such as refrigerant gauges and leak detectors will help you provide the best possible care for your air conditioning system. 

Troubleshooting Common Issues

A worker in a blue uniform and yellow hard hat examines an air conditioning unit next to a ladder, holding his hat with one hand. This scene is a typical example of the meticulous aircon maintenance services Singapore is known for.


Like any mechanical system, air conditioners can experience various problems that affect their performance and efficiency. Common air conditioning problems include frozen coils, low airflow, refrigerant leaks and drainage problems. 

Addressing Common AC Problems 

Here are the causes for the most common air conditioning problems – with tips to solve them: 


Frozen coils: Frozen coils occur when there is insufficient airflow over the evaporator coils, usually due to dirty air filters or obstructed coils. To resolve this issue, turn off the air conditioner, allow the coils to thaw completely, replace any dirty air filters, and thoroughly clean the evaporator coils.


Low airflow: Low airflow can be caused by dirty air filters, blocked air ducts, or a malfunctioning blower motor. Replace the air filters, clean the air ducts, and inspect the blower fan for any damage or obstructions. If the problem persists, it is best to contact a professional HVAC technician for further assistance.


Refrigerant leaks: Refrigerant leaks occur when there is damage to the refrigerant lines or connections. If you suspect a refrigerant leak, contact a licensed HVAC technician immediately. They will be able to locate and repair the leak, and then recharge the system with the proper amount of refrigerant.


Drainage problems: The condensate drain line can get blocked from debris buildup. You would know it’s blocked when there’s a musty smell coming from your AC or standing water near your AC unit.  To solve this, clear blockages in the drain line and ensure the condensate pump is working properly, or contact a professional for assistance.

The Consequences of Neglecting Air Conditioning Issues

Promptly addressing air conditioning issues is essential to avoid more extensive damage to your system. Ignoring signs of trouble can lead to more severe and costly issues down the line. Delaying repairs or maintenance can cause components to wear out more quickly and reduce the overall efficiency of your system. By tackling issues as soon as they arise, you can save yourself from more expensive repairs and help your AC last longer. 

Preventative Maintenance Tips

Consistent care and upkeep ensure your air conditioning system operates at peak performance and efficiency. By following simple tips and steps, you can prevent damage to your air conditioner and avoid costly repairs.

Maximising Efficiency and Savings: Tips for Reducing Your AC’s Energy Consumption

There are several strategies you can employ to reduce your AC’s energy consumption and save money without sacrificing comfort.


Close Curtains, Blinds, or Shades: Closing curtains, blinds, or shades during the hottest parts of the day prevents heat from entering through the windows. Switch on the ceiling or portable fan to cool the room. 


Change Air Filters: Dirty filters can significantly hinder your AC’s performance by restricting airflow and forcing the unit to work harder. Findings show that regularly replacing or cleaning your air conditioner’s filters can reduce the unit’s energy consumption by 5 to 15 percent.  Replacing your air filters monthly or as needed will maintain proper airflow and reduce the strain on your system.


Adjust Temperatures: Rather than setting your air conditioner to an extremely low temperature in an attempt to cool your space quickly, adjust the thermostat to just a few degrees below your desired temperature. Allow your air conditioning system to gradually lower the room temperature to your preferred level.


Set A Timer: Instead of running it continuously throughout the night, set a timer on your air conditioner. Allowing your AC to operate for just 1-2 hours, which is typically sufficient for falling asleep, can significantly reduce the strain on the unit and its components. Once the room has reached a comfortable temperature, turn off the air conditioner to give it a rest and ensure it operates efficiently when you need it again.


To keep your air conditioning system running efficiently and reliably, it’s recommended to have  maintenance checks performed by a professional HVAC technician monthly, or annually at least. Scheduling periodic tune-ups can help identify and address potential issues before they lead to costly repairs or system breakdowns, ultimately saving you money and ensuring your comfort throughout the cooling season.

Additional Tips To Prolong Your AC’s Lifespan

Shade your outdoor unit: Planting trees or installing an awning to shade your outdoor condenser can help it run more efficiently and prevent overheating.


Keep your outdoor unit clean: Ensure that the area surrounding your outdoor unit is free of debris, leaves, and other obstructions to maintain proper airflow.


Repair leaky ducts: Leaky ducts in your home can cause your air conditioner to lose up to 40% of its efficiency, putting additional strain on the system during the busy summer season. To prevent this, insulate and seal your ducts properly to reduce the burden on your AC and extend its lifespan. 


Regular air conditioner maintenance is crucial for ensuring optimal performance, efficiency, and longevity of your cooling system. From cleaning and replacing filters to inspecting essential components like the compressor and coils, each step plays a vital role in preventing breakdowns, reducing energy consumption, and improving indoor air quality.


Investing time and effort into consistent air conditioner maintenance offers numerous benefits, including lower utility bills, extended system lifespan, enhanced comfort, and a reduced environmental impact. By prioritising regular upkeep, you can enjoy a cool, comfortable, and healthy living space while saving money and contributing to a greener future.


Now that you know the importance of regular air conditioner maintenance, it’s time to take action. If you’re facing aircon troubles and searching for an aircon maintenance service company in Singapore, United Channel is your go-to solution. 


With a team of experienced and skilled technicians, United Channel provides comprehensive aircon maintenance services, from aircon installation to air conditioner chemical washes, for a healthier and more comfortable living environment. 


Don’t let aircon problems disrupt your daily life – trust United Channel to keep your air conditioning system running smoothly and efficiently. Get in touch with our team today to schedule your aircon maintenance check, and experience the difference that professional care and expertise can make.

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