15 Aircon Problems in Singapore & How to Prevent Them

aircon has electrical problem

Singapore’s climate being tropical in nature and leaving the residents with a hot and humid air around, air conditioning systems are not a luxury but an essential part of daily life. However, like any mechanical system, aircons can develop issues over time thereby hindering their performance. It is very important to identify the issues and quickly address them to ensure a soothing ambience.

Let’s look at the commonly faced Aircon problems by Singapore residents –

1. Poor Cooling Efficiency/ Reduced Cooling Efficiency Of Aircon

Singaporeans often complains that the AC does not cool properly. There can be various factors behind poor cooling efficiency. Dirty air filters is a major factor as if the air filter is dirty, it blocks the airflow of your unit. This in turn can freeze up the condenser unit and limit the cooling power of the aircon. Also, low refrigerant levels, clogged coils, a malfunctioning compressor, gas leakage etc can lead to poor cooling efficiency.

Scheduling for a regular maintenance by aircon professionals, will help to identify these issues ahead of time. Technicians can detect and fix the underlying issues or replace the air filter as needed.

dirty ac filters causes the aircon to not work properly
Dirty ac filters like this can cause reduced cooling effect

2. Aircon Water Leakage

Water leakage from your aircon unit is a common concern faced by many. Condensation and blocked or damaged drainage pipe mostly leads to leaking problem. The climatic condition of Singapore easily leads to condensation buildup. Pollutants, like dirt, dust, and fungus blocks the water to flow thereby clogging the drainage pipe. In such scenario, water from aircon tries to find the other way out, which in turn causes the AC to leak. Scheduling a routine maintenance where technician can clean the drainage pipe or replace it if needed will help prevent this issue.

aircon is leaking water
Water leaking from Air Cond

3. Noisy Air Conditioner

People have reported different sounds coming from their aircon unit. Depending on the type of problem, your air conditioner will make variety of sounds like clicking, buzzing, grinding or rattling sounds which can be very disruptive and unsettling. An inspection by a professional, to determine whether the sound is produced because of a blower issue or a refrigerant leakage or faulty compressor or fan motor, is important in order to provide the service accordingly and to fix it.

Technician fixing noisy aircon compressor
Technician fixing noisy aircon compressor

4. Bad Odors or Foul Smell

It is a very common complain of Aircon users, that their AC is emitting foul odors or weird smell. Unpleasant odors might be the result of the excess moisture content within the unit. To top it, the humid climate of Singapore, makes the moisture content quite high in the air. Again, this high moisture content can lead to mold or bacterial growth within the unit causing foul odors which in turn can cause health issues. Regular cleaning or replacing the air filters will help to maintain indoor air quality. You can also appoint a professional cleaner to service the aircons at regular intervals which will keep the unit in good health and thus let you enjoy a clean air around.

5. High Energy Consumption

The inefficient functioning of air conditioning system is a very common cause of high electricity bills. Different issues like duct leaks, clogged filters, low refrigerant, dirty coils, aging components etc. makes the aircon inefficient thereby make it use a lot of electricity to operate. Naturally you see a sudden spike in your electricity bills. It is advised to do regular maintenance and cleaning which will help to improve the efficiency of the units and thus save you from paying high electricity bills.

Thermostat may show different signs of malfunctioning like uneven cooling or heating, constant cycling, inaccurate temperature readings, failure to start or stop. When the AC is not working or turning on, you may try to check the batteries and change them if needed. If the batteries are in working condition, check the thermostat programming to make it work again. If your AC is still not turning on, you will need to check the circuit breaker as it might be tripped and a resetting would be needed. Proper calibration or replacement of the thermostat may be necessary to fix thermostat related issues and improve overall system performance. Be mindful to schedule the thermostat replacement with a reliable service provider.

7. Refrigerant Leaks or Gas Leakage

Refrigerant Leaks is another very commonly dealt issue faced by users. The Gas level can drop due to some leakage from where the gas escapes. Refrigerant is the core element for the cooling process, and a leakage can totally impair your air conditioner’s performance. Leakage means the temperature will vary and the unit will not perform accurately. This in turn results in low efficiency, high power consumption, coil freezing, damaged compressor etc.

Hence, if you suspect a refrigerant leak, it’s important to contact a professional technician immediately. Technician will locate and fix the leak and recharge the system by filling up the refrigerant as needed to ensure proper efficiency.

gas leaking from the air conditioning system
Gas leaking from the air conditioning system

8. Outdoor Unit/Compressor Fan Issue

The major job of the outdoor fan is to diligently transfer the heat from your indoor to outdoor and hence it plays a very important role in determining proper functioning of the aircon unit of your house. If the compressor fan does not function properly, then the heat gets trapped within the outdoor unit thereby causing damage to the compressor. Many issues like belt issues, motor malfunctions, faulty contactor or a faulty capacitorcan result in such problem. Due to excessive use of AC in Singapore throughout the year, these issues are quite common. A professional should be consulted to check and perform the services needed at the earliest when such circumstances are faced.

ac outdoor compressor fan
AC outdoor compressor fan

9. Short Cycling

When the AC unit turns on and off more frequently without fully completing a cycle it is called Short Cycling. This premature turning off of your unit, causes the system to work even harder than it needs to cool your home at the set temperature. Naturally, this adds on to the wear and tear on the system, increases the energy consumption, leading to higher energy bills. If there are low refrigerant levels, an oversized unit, or a faulty thermostat can lead to short cycling. This issue should be addressed with immediate attention of a technician.

10. Frozen Evaporator Coils (part of the inside unit)

The evaporator coil can get frozen, when your air conditioner suffers restricted airflow in comparison to what is needed for operation. Insufficient airflow can be a result of blocked vents and ducts, dirty filters, faulty fan or a malfunctioning blower motor. You can try to address this problem yourself by turning the unit off which will allow the coils to thaw. You can then clean or replace the air filter as needed. However, consulting a technician would be better who can inspect and come up with the best solution needed.

11. Frozen Condenser Coils (part of the outside unit)

Again aircon users often complain that the outside unit is freezing. If there is insufficient air flow throughout the coils, the unit can freeze up. Also, few other AC problems like low coolant levels, low outside temperature, blower motor problems, etc can freeze up the system. This needs to be attended by aircon specialist and treated with the needed service accordingly.

12. Air-conditioner Fails To Turn On

This is one of the most common issues that people face specially on a very hot and humid day in Singapore. This can be a major nightmare. There can be different reasons for this problem.

It can be a power supply problem or broken/burnt wires or even a faulty thermostat. Though these are some of the common aircon problems, they need immediate attention from professionals. Professionals carry out a diagnosis to spot the root cause of the issue and fix it for you.

13. Low Level of Refrigerant or Low Gas Levels

Refrigerant is crucial for the cooling process. It removes the moisture and heat from the interior space and turns the hot air into a cooler one. Naturally, when the refrigerant level drops, it affects the cooling too. When the Gas level is low, the air that is blown over your AC coils will not cool properly anymore. This will lead the vents to circulate warm air and you will have an uncomfortable temperature around. The only solution to this problem is to get a gas top up or gas refill done by some aircon professional at the earliest so that your aircon can charge up it’s fuel.

14. Drainage Problem

When you see standing water around your Aircon, it might mean that the drain pipeline is most likely clogged. Dust, dirt or algae often clogs the drain pipeline. The condensate pan will not be able to empty itself because of this clogging and thus you will face collection of water outside around the unit or near the indoor unit. Moreover, this drainage issue might be a breeding ground for mold, mildew or fungus and bad odor. If the AC air filters are cleaned or replaced timely, it can easily prevent such blockage that leads to drainage problems. When you face such issues, do contact a technician who can help to flush the drain lines and fix this issue.

15. Electrical Problems

Having all electrical connections secured is very important for proper functioning of your aircon. If the aircon is malfunctioning or not turning on at all, there can be some electrical issues like faulty wiring or tripped circuit breakers. Such circumstances should be handled by a professional electrician so that the issue gets resolved and your house is secured from electrical mishaps.

In the hot weather of Singapore, an a well-functioning and efficient air conditioner is more of a necessity than a luxury. The aircon problems discussed above are the most common issues reported by users. However, it should be noted, that none of these issues are too much expensive if recognized and treated at the right time. Regular maintenance and timely repairs are essential for ensuring your aircon operates efficiently and reliably at all times. If any of these issues are faced, seek professional assistance for the benefit of your aircon and your household who will help you with the best solution.

Top 3 Reasons For Noisy Aircon Compressor & How To Fix?

Technician fixing noisy aircon compressor

Are you hearing a loud clanking, rattling or buzzing noise from your AC compressor? A noisy compressor can not only be annoying but can also indicate underlying issues that need your attention. In this article, we will explore the top five reasons for a noisy aircon compressor and provide solutions to help you enjoy a quieter and more efficient cooling experience.

1. Malfunctioning Compressor Motor

A malfunctioning compressor fan motor is the number one reason for your compressor to be noisy. The compressor motor is a vital component of your air conditioning system. When it starts to malfunction or fail, it can generate various noises, such as clicking, banging, or even high-pitched screeches. Common causes of a malfunctioning compressor motor include wear and tear over time, electrical issues, or overheating due to a lack of maintenance.


To address a malfunctioning compressor motor, it’s essential to consult a professional HVAC technician. They will assess the situation and may recommend one of the following solutions:

  • Motor Repair: In some cases, the motor might be repairable by replacing specific components. Repair costs can vary but typically range from $200 to $600, including labor.
  • Motor Replacement: If the motor is severely damaged, it might need to be replaced. The cost of a compressor motor replacement ranges from $500 to $1,500, including parts and labor.

2. Bent Or Misaligned Compressor Fan Blades

The compressor fan blades play a crucial role in air circulation within the unit. When they become bent or misaligned, they can generate various noises, such as rattling, clicking, or scraping. This issue can occur due to accidental impacts, debris getting caught in the fan, or natural wear and tear.

Compressor fan blade
Compressor fan blade


Resolving bent or misaligned fan blades usually involves one of the following:

  • Blade Straightening: In many cases, a technician can straighten the blades, which is a cost-effective solution. Blade straightening typically costs around $100 to $200, including labor.
  • Blade Replacement: If the fan blades are severely damaged, they may need to be replaced. The cost for new blades can range from $150 to $300, including parts and labor.

3. Overused Compressor

An overused compressor can put excessive stress on various components within the unit, causing screws, bolts, or other parts to become loose or damaged. This can result in noises like rattling or clanking. Overuse is often a result of not following a proper maintenance schedule, including neglecting cleaning and servicing.

Technician repairing aircon compressor
Technician repairing aircon compressor


Fixing this issue typically involves:

  • Tightening Loose Components: A technician can tighten any loose screws, bolts, or components. This part of the repair may cost around $100 to $200, including labor.
  • Component Replacement: If parts are severely damaged, they should be replaced. The cost for this type of repair can vary significantly, depending on the extent of the damage and the specific components that need replacement. It may range from $150 to $500 or more.
In all cases, it’s crucial to consult a professional HVAC technician to accurately diagnose and resolve these issues. Attempting DIY repairs can lead to further damage and may void your warranty. Professional technicians have the expertise and experience to ensure the safe and effective repair of your aircon compressor. The estimated costs provided are approximate and may vary depending on your specific situation and location.

Top 8 Reasons To Service Aircon Regularly In Singapore

Technician Doing Regular Aircon Servicing

The unique climatic conditions of Singapore, demands an efficient aircon system that will work consistently to keep the indoor spaces cool and comfortable.

According to air-conditioning experts, aircon maintenance and inspection should be done at least once every three months even if the unit is not faulty. This is crucial in assuring that the air conditioner will run as efficiently as possible.

Technician repairing aircon
Technician repairing aircon

Major Benefits of Regular Aircon Servicing

1) Increases System Efficiency

If general servicing is done at a regular interval, it helps to maintain the efficiency of the air conditioner. With time, dust particles and debris accumulates on the coils and filters thereby reducing its efficiency. To make the air cool down, the unit then has to work harder resulting in increased energy consumption. Regular maintenance will ensure your unit remains at peak performance, by cooling the air faster and have more efficient power consumption.

2) Purifies Indoor Air Quality

It is very important that the air we breathe in is fresh and purified. Air conditioners, over time start to accumulate dust, dirt and debris which can easily get circulated into your home atmosphere, leading to various health issues such as allergies or respiratory problems. If Aircon servicing is done at regular intervals, a thorough cleaning of the dirt and other impurities that have accumulated on the filters and evaporator coil is guaranteed. Hence you and your loved ones get a purified dust free fresh air.

3) Extends Aircon Longevity

It is important to understand that just like any other mechanical device, an aircon also needs timely servicing. Lack of regular maintenance, will lead its parts to wear out over time and the lifespan of the aircon may reduce to only a few years. On the other hand, if regular servicing is conducted, it can increase the longevity of your aircon up to 15 to 20 years. Considering the hot and humid climate of Singapore, it is recommended to do a general servicing every 3-4 months. This will in turn lengthen the lifespan of your unit thereby bring down your overall expenses.

4) Protection against Infections

Air conditioners can become breeding grounds for mold, bacteria, fungus, unwanted pests and allergens resulting in contaminated air from the aircon unit. This will naturally result in a foul smell and can even make you fall sick. A regular cleaning and maintenance will help to protect the unit from this breeding of infectious germs.

5) Save on Electricity Bills

The aircon will function at it’s peak if the unit is clean. The cleaner the aircon is, the highest will be its efficiency level leading to a faster cooling. Faster cooling implies more efficient power consumption and less electricity bills to pay.

6) Prevent Breakdowns

By doing a routine maintenance, the professionals can easily identify potential issues and thereby prevent them from eventually turning into major problems or a major breakdown. This proactive approach can prevent unexpected breakdowns and costly repairs.

7) Value for Money

Regular servicing is cost effective as it helps to save your money in many ways. It helps to reduce power consumption thereby saving you on electricity bills. Again, it helps to purify the air you breathe in thus saving you the cost of doctor visit and ill health. Also the expenditure on highly expensive chemical overhaul and repairs are minimized with routine cleaning and maintenance.

Save on your bills
Save on your bills

8) Provide proof of Aircon servicing or get a Service Record

In Singapore, many house owners or landlords asks for a proof of regular aircon servicing, from their tenants. If regular servicing is done, the service provider can issue the Service Record or the proof of service which will help in your tenancy agreement with your landlord.

What happens if air conditioner is not serviced?

If the air conditioner unit is not serviced at regular intervals, it will surely be inefficient and not be able to cool the space, even after remaining on for hours. This will naturally result in – high electricity bills, non-functional aircon and expensive repairs!

In Singapore’s climate, where air conditioners are more of a necessity rather than a luxury, regular servicing is vital. Scheduled maintenance of aircons ensures energy efficiency, prolongs the lifespan of your unit, and improves indoor air quality. Moreover, it also prevents health issues and costly repairs for breakdowns.
Hence, to enjoy the full benefits of your air conditioner and maintain a comfortable and healthy living environment, make sure to schedule regular servicing with a trusted professional. It’s an investment that pays off in both the short and long term, ensuring that you stay cool and comfortable in Singapore’s hot and humid weather.

How Often To Service Aircon For Best Performance? [2023]

Aircon servicing done every 3 months

In this scorching heat of Singapore, air conditioners are a lifeline, providing much-needed respite from the oppressive weather. To ensure that your AC unit functions efficiently and reliably, it is essential to do regular servicing.

According to aircon service providers, whether or not the aircon is suspected with any problem; it is advised to have it serviced and inspected at least once every 3 months. Irrespective of the fact the air conditioner is faulty, performing a General Servicing at this frequency, will ensure it’s operation at maximum efficiency.

Factors That Influences The Frequency Of AC Servicing

1. The Type Of Aircon Unit

The frequency of servicing significantly depends on the type of Air Conditioner installed.

There are primarily two types of air conditioners:

(A) Window AC Units: The size of these units is smaller and installed in single-room. These air conditioners usually need to be serviced once a year. It is recommended to service before the summer season as the usage rate is higher during this season.

(B) Central AC Systems: Central air conditioning systems are the second type that cools down the entire house. This type of system needs servicing every six months or at least once a year.

2. The Pattern of its Usage

Every household has different usage pattern. The frequency, at which the air conditioner needs to be serviced to a large extend depends on how often it is being used.

(A) Seasonal Usage: If the aircon is used only during the warmer days i.e summer season, then you can just do an annual servicing before the start of the season.

(B) All Year–Round Usage: If the usage of the air conditioner is throughout the year, then it needs to be serviced more frequently like every six months.

3. The Environment

The environmental conditions are also a key deciding factor on how often the AC needs a servicing.

(A) Climate: In hot and humid places, like Singapore, where air conditioning is not just a luxury but a necessity, to maintain a comfortable indoor environment, it is essential to service the aircons more often due to its heavy usage or usage for a prolonged period.

(B) Air pollution and dust: Depending on the dust and pollution of the area, the air filters of the unit might get quickly clogged and hence attention needs to be paid in frequent servicing.

4. Signs From The Air Conditioner Itself

At many times, the AC itself gives different signs indicating that it needs attention. Sudden water leakage, reduced cooling etc are indications that the AC needs an immediate servicing.

5. Manufacturer’s Recommendations

How often, an aircon unit needs general servicing also varies depending on the brand and model type. It is thus important to follow the guidelines provided by the respective manufacturers.

Technician doing regular Aircon servicing
Technician doing regular Aircon servicing

Singapore Regulations On Air Conditioning Systems

In Singapore, the National Environment Agency (NEA) and the Building and Construction Authority (BCA) have placed regulations around air conditioning systems to ensure safety and environment efficient operation. These regulations include the Air-Conditioning and Mechanical Ventilation (ACMV) system under the Building Control Act and the Environmental Public Health Act.

As per these regulations, the NEA recommends regular servicing of all aircon units at least every 3 months, whereas BCA recommends a servicing at least once a year.

All aircon service contractors must be licensed by NEA and the technician must be trained to conduct aircon servicing.

All residential and business air conditioning systems must comply with these regulations in Singapore.

To conclude, the frequency at which air conditioner should be serviced, depends on various factors, like the type of AC, usage patterns, environmental conditions, manufacturer recommendations, and your maintenance habits.
If you neglect regular AC maintenance, it can lead to reduced efficiency, increased energy bills, and even system breakdowns during the hottest days. Therefore, it’s crucial to schedule aircon servicing at a regular interval. Remember that regular maintenance not only extends the lifespan of your AC unit but also ensures that it continues to provide the cool comfort you rely on, season after season.

Who Pays For AC Service In Singapore – Tenant or Landlord?

ac technician in Singapore

Singapore’s tropical climate can make air conditioning a necessity rather than a luxury, especially in rental properties. To ensure a comfortable living environment, it’s crucial to address aircon servicing and repairs promptly. But who bears the responsibility for aircon servicing and repairs in rental properties in Singapore? In this article, we’ll explore the common questions and issues surrounding aircon servicing in rental properties.

Technician doing aircon servicing in rented flat
Technician doing aircon servicing in rented flat

Do Tenants or Landlords Service Aircon in Singapore?

The responsibility for aircon servicing in Singapore rental properties often depends on the terms outlined in the tenancy agreement. Typically, landlords are responsible for the initial servicing and maintenance of air conditioning units before a new tenant moves in. This includes ensuring that the aircon units are clean and in good working condition.

Who Should Pay for Repairs: Landlord or Tenant?

When it comes to repairs, the general rule is that landlords are responsible for major repairs and replacements due to normal wear and tear. This includes issues like compressor failure, motor problems, or leaks. However, if the tenant is found to be responsible for the damage, or has not followed the regular aircon service terms as per the tenancy agreement, they may be liable for the repair costs.

Should Tenants Pay for Aircon Repair?

Tenants are usually not responsible for the cost of repairing air conditioning units if the damage is not due to their negligence or misuse. However, tenants are expected to report any issues with the aircon promptly to the landlord to prevent further damage and ensure timely repairs.

Who Pays for Aircon Servicing?

Regular aircon servicing, such as cleaning the filters and checking for minor issues, is typically the responsibility of the tenant during the tenancy period. It’s essential for tenants to maintain the cleanliness of the air conditioning units to ensure they function efficiently. Some tenancy agreements may specify a schedule for aircon servicing, so tenants should review their lease to understand their obligations.

Do Tenants Have to Do Aircon Chemical Servicing After the End of the Tenancy Period?

Aircon chemical servicing is a more extensive and thorough cleaning process that involves dismantling and cleaning various components of the air conditioning unit. In most cases, tenants are not responsible for aircon chemical servicing after the end of the tenancy period unless specified otherwise in the tenancy agreement. It’s typically the landlord’s responsibility to ensure the unit is in good condition for the next tenant.

Tips for Tenants and Landlords:

  1. Read and Understand the Tenancy Agreement: Both tenants and landlords should carefully read and understand the terms of the tenancy agreement regarding aircon servicing and repairs. If there are any ambiguities, consider clarifying these points before signing the contract.
  2. Regular Maintenance: Tenants should perform regular maintenance, such as cleaning filters, to ensure the air conditioning units function optimally. This can help prevent major issues and prolong the lifespan of the units.
  3. Document and Report Issues: Tenants should promptly report any aircon issues to the landlord and document the condition of the unit during move-in and move-out to avoid disputes over damages.
  4. Communication is Key: Landlords and tenants should maintain open and clear communication regarding aircon servicing and repairs to ensure a comfortable living environment for the tenant and the longevity of the equipment.

In Singapore, the responsibility for aircon servicing and repairs in rental properties is primarily determined by the terms of the tenancy agreement. Landlords generally bear the responsibility for major repairs and initial servicing, while tenants are typically responsible for regular maintenance and minor issues during the tenancy period. To avoid disputes and ensure a pleasant living experience, both landlords and tenants should understand their obligations and communicate effectively when it comes to air conditioning maintenance and repairs.

Common Reasons For AC Blinking Light & How To Fix?

ac technician in Singapore

When you encounter blinking lights on your air conditioner’s control panel, it’s like a secret language that your AC unit is speaking to you. These blinking lights often come in different colors, with green, orange, and red being the most common. In this article, we’ll dive into what these different-colored blinking lights signify and emphasize the importance of consulting your aircon’s user manual to decode the specific messages.

Understanding Blinking Light Colors

  1. Green Blinking Lights: Green blinking lights typically indicate that your air conditioner is operating normally or that a specific feature, like the fan or timer, is activated. It’s usually nothing to be concerned about, but it’s a good idea to check your user manual for more details on what the specific green blink pattern means for your unit.
  2. Orange Blinking Lights: Orange blinking lights usually indicate a minor issue or a system alert. These alerts might include reminders to clean or replace filters, a warning about reduced refrigerant levels, or notification of an impending maintenance schedule. While orange blinks are generally not an emergency, they should prompt you to consult your user manual for guidance on addressing the specific issue.
  3. Red Blinking Lights: Red blinking lights are the most critical and typically indicate a serious problem with your air conditioner. This could range from a major technical fault to a refrigerant leak or other significant issues. When you see red blinking lights, it’s crucial to consult your user manual immediately, as the AC unit might require professional attention.

Common Blinking Light Patterns and What They Mean

  1. Power Indicator Blinking: If the power indicator light on your AC unit blinks, it could indicate a problem with the power supply or a tripped circuit breaker. Check your circuit breaker, power source, and ensure the unit is properly plugged in.
  2. Temperature Indicator Blinking: Blinking temperature indicators often signify a fault with the thermostat sensor. This can result in erratic temperature control. The sensor may need cleaning or replacement.
  3. Timer Light Blinking: When the timer light blinks, it usually means that the timer function has been activated. Check your remote control settings and turn off the timer if it’s not intended.
  4. Filter Indicator Blinking: A blinking filter indicator typically indicates that it’s time to clean or replace the air filter. A clogged filter can reduce efficiency and affect air quality.
  5. Error Code Display: Some AC units display specific error codes, such as E1, E2, or E3. Refer to your unit’s manual to decode these error codes, as they can vary depending on the manufacturer. These codes are invaluable for diagnosing specific issues.

Daikin Error Codes Mitsubishi Electric Error Codes

Aircon blinking lights are a valuable tool for understanding the health and status of your air conditioning system. By decoding these indicators, you can often pinpoint and address issues before they become major problems, helping you maintain a comfortable and efficient indoor environment. Remember that regular maintenance, such as cleaning or replacing filters, can go a long way in preventing many common AC issues signaled by blinking lights. When in doubt, don’t hesitate to seek professional assistance to ensure your AC unit operates optimally.