Author: Cool-Aire

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DIY Aircon Troubleshooting Singapore: What to Check Before Calling a Repair Service

Split air conditioner with panel open showing blue filters during DIY troubleshooting

In many Singapore homes, even the most well-maintained air conditioning units may eventually experience issues due to frequent usage. It is important for homeowners to recognise the signs that an aircon needs repair before it becomes a major expense. Let us dive into some common issues you may encounter with your air conditioner, and a guide for DIY (Do-It-Yourself) aircon troubleshooting in Singapore.

Common Aircon Problems and What They Might Mean

Aircon Leaks

Aircon leaks are one of the most frequently reported issues in Singapore homes. If you notice that your aircon is leaking, it may mean that there are drainage blockages due to algae or dust sludge.

Aircon Light Blinking

If your aircon light is blinking, your unit may be communicating a fault code. Common problems that may be signalled from blinking aircon lights include improper installation or system errors, depending on your model.

Poor Cooling

Have you noticed hot and cold spots in your room despite turning the aircon on? Poor cooling in an air conditioner may be caused by various issues such as clogged air filters, low refrigerant levels, and dirty condenser coils.

Musty Smell

A musty odour coming out from your aircon unit may be caused by the buildup of dust and other particles on the aircon filter. This may be common in units that have not been cleaned in a long time.

Unit Not Turning On

There are various reasons that an air conditioner cannot be turned on. This includes incorrect thermostat settings, a tripped breaker, dirty air filters, frozen coils, or other electrical issues that need professional attention.

Step-by-Step DIY Aircon Troubleshooting for Homeowners

Homeowner using remote control to operate a wall-mounted air conditioner in a Singapore home

Before deciding if you should get professional aircon troubleshooting in Singapore, here are some troubleshooting tips you can do at home.

Aircon Leaking

Water leaks from aircon units are preventable. You can try clearing the drainage pipe to allow the clogged water to flow out properly. However, there are other causes that require a different repair approach, such as dirt buildup in the coils or improper installation. Engaging a professional technician can help you identify and address the root cause.

Aircon Light Blinking

Modern air conditioning systems use specific sequences as a built-in troubleshooting tool. You can try to check your system manual to understand the patterns being shown. If you are unsure, contact a technician.

Poor Cooling

The most common cause of an aircon not cooling properly is wrong settings. Make sure your unit is set to cool mode and not just fan. If it is still not cooling, remove and clean your air filters. If it still does not work, you may need professional assistance.

Musty Smell

To get rid of musty odours from your aircon, check your air filters to see if they are clogged. Use warm, soapy water to clean it, ensuring it is completely dry before reinstalling it. You can also clear blockages from the drain line with a wet/dry vacuum. If the issue still persists, get in touch with a professional technician to inspect your unit.

Unit Not Turning On

Start by checking your power supply and ensuring that the breaker box has not tripped. Switch off at the isolator for 60 seconds, then try to restart it. If the problem persists, a professional inspection is needed on your unit before using it again.

When Should You Call an Aircon Service Company?

Determining when you should get a professional inspection over a simple DIY fix for your aircon can help you save costs. Sometimes, simpler issues with your air conditioning unit can be addressed by resetting the unit or cleaning dirty filters and drain pipes. However, a professional aircon repair and troubleshooting service in Singapore may be necessary if you experience persistent problems such as constantly weak cooling, electrical faults, compressor failure, or any issue with the outdoor unit. Aside from identifying the root problem, a professional technician is trained to handle situations that involve pressurised systems and high-voltage components. These components may pose harm if you attempt to inspect them on your own. Cool-Aire’s repair and troubleshooting service helps to give you an accurate assessment to ensure that your unit can perform optimally.

FAQ

How often should I clean my AC filters?

To keep your aircon performing optimally, clean the air filters every 1-3 months. If you use your unit more frequently, you may need more frequent cleaning.

Why is my aircon making a loud noise?

Unusual noises from your air conditioner may be caused by loose parts, a failing fan motor, or a refrigerant gas leak. Book a professional aircon troubleshooting in Singapore to address the issue promptly.

How to solve poor aircon air distribution at home?

Sometimes, despite a properly functioning unit, you may still feel insufficient air distribution in your home. Make sure that your vents are not blocked by large pieces of furniture such as sofas, cupboards, rugs, or drapes, as this can trap air and waste valuable energy. Check that there is no furniture within at least 25 cm from the vent to allow cool air to circulate.

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Aircon Compressor Noise: Causes, Warning Signs, and Solutions

Homeowner checking air conditioner with dusty filter causing poor cooling performance

A noisy air conditioner compressor may cause inconvenience in your home, especially if the issue does not resolve for a long time. What can be the reasons behind aircon compressor noise, and is it a warning sign for more serious issues? Get to know the common causes of a noisy compressor and when you should consider repairing or replacing it.

Types of Compressor Noises and What They Mean

The compressor is considered as the heart of every aircon system because of its critical role in circulating refrigerant, allowing your aircon to cool your room. However, you may face issues such as a noisy compressor over time. Here are some common types of aircon compressor noises and what they might signify.

  • Humming and buzzing: May be caused by loose parts, debris, and faulty fan motors
  • Rattling and banging: May be caused by a malfunctioning compressor motor or an unbalanced indoor blower
  • Clicking noises: May be caused by electrical problems
  • Hissing noises: May be a sign of blockages or pressure in the aircon system
  • Grinding, squeaking, and squealing: May be caused by a malfunctioning compressor fan motor

Common Causes of Compressor Noise

While a professional inspection is needed to identify the root cause of a noisy air conditioner compressor, some of the most common causes include:

Wear and Tear

In older aircon units, the compressor may be in suboptimal condition due to wear and tear and produce noises. The compressor’s electrical components may also produce noise due to overheating.

Motor Malfunction

A malfunctioning compressor fan motor is a common source of noise in your aircon compressor. As the motor is vital to the compressor, any malfunction or failure can cause it to generate unwanted noises.

Refrigerant Issues

Refrigerant issues, such as incorrect levels or leaks, may cause the compressor to make noises. A hissing or low humming noise is particularly alarming as it may indicate a leak. As refrigerant leaks are dangerous, you should schedule an inspection to address the issue immediately.

External Problems

The accumulation of debris or positioning the compressor too close to walls or other objects may also cause aircon compressor noise. Dirt and small stones may get stuck in the compressor and obstruct its operation, creating a rattling noise. As these obstructions can hinder optimal airflow, the compressor needs to work harder, resulting in louder sounds and potentially overheating.

Warning Signs Your Compressor is Failing

Most of the time, a malfunctioning compressor has other warning signs along with unwanted noise. Here are the signs you should not ignore:

Aircon Not Cooling Properly

If your aircon is not cold and only blows out warm air, it may signal that your compressor is not circulating the refrigerant correctly.

Weak or Reduced Airflow

A failing compressor can cause the airflow from your unit to weaken. However, this is a common signal in both compressor issues and airflow problems, and a professional inspection is recommended to determine the exact cause.

Breaker Trips

When your compressor is failing, it draws too much power and can cause frequent breaker trips. This often indicates overheating or electrical damage.

Refrigerant Leaks

Wet spots, oily stains, or hissing sounds around your outdoor unit may be a sign that your refrigerant is leaking. Since the compressor needs adequate refrigerant levels to work, professional diagnostics are essential before it overheats or fails entirely.

Outdoor Unit Not Turning On

In some cases, the indoor blower may continue running, but the outdoor unit does not engage. This may indicate that the compressor has failed or its capacitor may be defective.

Solutions for Noisy Aircon Compressors

Aircon chemical wash cleaning with pressure spray on evaporator coil

Here are the steps you can take to resolve aircon compressor noise:

Regular Cleaning

Keeping your indoor and outdoor aircon unit clean is essential to prevent unwanted compressor noise. Inspect the outdoor unit regularly to make sure it is free from obstructions. If necessary, reposition it to avoid debris. You can also install a mesh guard over the vents to filter out debris, and clean your aircon filter regularly.

Check for Wear and Tear

While in between your aircon maintenance schedules, you can perform independent checking for wear and tear to prevent minor issues from turning into major problems. For instance, check and tighten any loose parts, such as screws and bolts. Bent or damaged fan blades should also be replaced to prevent rattling noises.

Schedule Regular Maintenance and Cleaning

Scheduling regular maintenance by a professional technician can help ensure that your aircon compressor and other components are in prime condition. This can help prevent more expensive servicing from more serious damages in the future. A professional technician is also equipped with the necessary training and tools to do an inspection and aircon compressor cleaning, keeping your compressor working optimally.

When to Repair vs Replace Your Compressor

Professional aircon deep cleaning and water jet servicing to remove mold and dust from a residential fan coil unit


Frequent aircon compressor noises and other issues may cause you to wonder about whether it is time to get a new compressor. In certain cases, repairing it may be a more cost-effective choice, especially if the unit normally performs reliably and still meets your current air cooling needs. For instance, if the noise is due to a damaged component who can be easily replaced, you may not need to get a new compressor entirely.

However, if you have an older unit with frequent breakdowns, consumes excessive energy, and the compressor’s replacement parts are difficult to find due to coming from an outdated model, it may be more reasonable to replace it. In this case, getting a new compressor may help reduce energy consumption and costs due to repeated repairs. For a more sound decision, it is best to consult with a professional technician who can inspect and identify the main cause of your noisy air conditioner compressor.

Maintain Your Aircon Compressor with Our Professional Service

Aircon compressor noises can cause significant disturbance in your home. If you are unsure about the cause or source of the noise, our professional team at Cool-Aire is here to assist you. Aside from addressing unwanted noise, we help keep your compressor working efficiently, extending the lifespan of your aircon unit. Get in touch today to enquire about our services!

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Aircon Gas Leak – Should You Fix It Yourself?

Aircon servicing process with technician checking indoor unit and protective cleaning bag attached

Gas leaks are one of the most common issues in air conditioners that are often overlooked. If left unchecked, aircon gas leaks can have dangerous consequences, especially in Singapore’s hot and humid weather. However, fixing aircon gas leaks by yourself is not recommended and should be done by a professional technician. This guide will help you understand the common causes of aircon gas leaks and what to do to prevent further damage.

Signs Your Aircon Has a Gas Leak

Here are the signs to look for that may confirm whether your aircon has a gas leak.

  • Strange odour coming from your aircon
  • Unusual noises such as hissing or whistling, are due to air escaping the system
  • Air conditioner not cooling as it attempts to compensate for insufficient refrigerant
  • Any signs of condensation or moisture around your aircon
  • An unexplainable rise in electricity bills

7 Common Causes of Aircon Gas Leaks

Understanding the root cause of a gas leak can help you get timely help and avoid more complex issues. Here are some of the most common reasons behind aircon gas leaks:

Poor Installation

Poor installation of your aircon unit, especially at the joints or pipe connections, can create gaps where gas may slowly escape. This may also happen if installers fail to tighten the fittings securely. Vibrations from the compressor or physical impact may also cause the joints to loosen, increasing the chances of a leak.

Corroded Pipes

In older aircon units, exposure to moisture and chemicals may cause the pipes that carry refrigerant between your indoor and outdoor units to corrode. This results in cracks through which gas can also escape.

Faulty Compressor

The compressor is a crucial part of your aircon system that circulates refrigerant through the system, absorbing indoor heat and releasing it outdoors. Normal wear and tear, electrical issues, or overheating may cause the compressor to fail, leading to gas leaks.

Damaged Evaporator or Condenser Coils

Your aircon has an evaporator coil in the indoor unit and a condenser coil in the outdoor unit with thin aluminium or copper fins. Improper cleaning and corrosion from accumulated dirt may damage these coils and cause gas leaks.

Valve Problems

Valves that are not properly sealed, due to prolonged wear or debris that may have caused the refrigerant to leak out. Some technicians may also forget to seal the service valves after maintenance work.

Physical Damage from Accidents

External damage from falling objects, renovation work, or strong winds may cause pipes to be cracked, causing gas leaks. Indoor units can also be affected by water damage.

Manufacturing Defects

In some cases, brand new aircon units may have manufacturing defects such as faulty or improperly assembled components. Although not immediately apparent, they can cause leaks in the first few months or years of using the aircon.

Why DIY Gas Leak Repair Is Dangerous

Upon suspecting that a gas leak has occurred, you may think about repairing it yourself to save time and costs. However, DIY gas leak repairs can be extremely harmful. The most common aircon gas, Freon, can harm both the environment and the people exposed to it. Qualified technicians are equipped with the necessary tools such as electronic sniffers, UV dyes, and pressure tests, to detect and identify the cause of the leaks accurately, preventing further exposure to the leaked gas. They can also safely perform an aircon gas top up if needed.

In addition, your aircon unit has a considerable amount of piping, electrical components, and other parts that must be inspected carefully by a qualified technician. These technicians have undergone dedicated training and strict safety precautions to perform the repair safely. In attempting a DIY repair, you may unintentionally cause further damage to your aircon unit. If this happens, you may end up having to pay for more costly repairs. Getting in touch with a professional technician is a safer, more cost-effective decision in the long run.

What to Do If You Suspect a Gas Leak

Instead of attempting to fix an aircon gas leak or doing an aircon gas refill yourself, here are the steps you should take:

  1. Switch off your aircon unit immediately to prevent further damage, especially to the compressor.
  2. Call a professional technician to schedule a repair as soon as possible.

How Professionals Detect and Repair Gas Leaks

Aircon refrigerant manifold gauge set measuring pressure during servicing

Professional technicians use a variety of methods to detect and address aircon gas leaks, which are:

Electronic Detectors

Electronic leak detectors or “sniffers” are highly sensitive handheld devices that are able to detect refrigerant gas in the air. The technician will move the detector’s probe along your aircon’s joints and coils, sampling the air around it to detect the presence of unique chemical compounds present in refrigerants.

UV Dyes

The UV dye leak detection method can be used to detect leaks hidden inside coils or hard-to-reach areas. The technician will inject fluorescent dye into your aircon’s refrigerant circuit. The dye mixes with the refrigerant and circulates together with it throughout your aircon system. If there is a leak, the refrigerant gas escapes along with the dye. The technician will use UV light and special goggles to detect any escaped dye due to the leak.

Once your technician confirms that your aircon gas is leaking, they will seal the leak by securing any loose connections and welding broken joints. They may also replace damaged coils or pipes if needed. They will also perform an aircon gas top up according to the suitable type and amount of refrigerant indicated by your aircon manufacturer. This procedure helps replenish the refrigerant levels that have been lost due to the leak in your system so that your aircon can go back to operating optimally.

How to Prevent Future Gas Leaks

ircon servicing process with technician measuring refrigerant pressure using gauge set and gas tank

Although gas leaks in your aircon unit need to be repaired immediately once they occur, there are certain steps you can take to prevent this issue from happening again.

Schedule Regular Maintenance

Regular services for your aircon unit keep it running efficiently. Professional technicians can identify early signs of loose connections or minor issues before they worsen.

Request Leak Tests

During your routine checks, you can ask your technician to conduct a basic leak check to ensure everything is working well. This simple step can go a long way to save you from unexpected expenses.

Choose a Trusted Aircon Servicing Company

Attempting to fix any issues in your aircon yourself or hiring unqualified technicians may cause further problems for your unit. Booking regular checks from a reputable aircon servicing company ensures that your aircon unit can be handled properly without damaging the components, with maintenance and repair methods that complies with industry standards.

Keep Your Aircon Unit Running Safely and Efficiently with Our Professional Service

Aircon gas leak is a serious issue that needs to be addressed by a professional technician. If you suspect that your aircon is leaking, get in touch with Cool-Aire immediately. We offer routine maintenance, washing, and aircon gas top up in Singapore for you to enjoy a safer, more comfortable home. Book our services at Cool-Aire today!

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Aircon Chemical Wash Price in Singapore: What Affects Costs?

Aircon chemical wash cleaning with high-pressure spray on indoor unit coil

An aircon chemical wash is an essential service to keep your aircon unit performing efficiently. A chemical wash gives your aircon a deep cleaning treatment which cannot be covered by regular services. If you are considering getting an aircon chemical wash in Singapore, one of the considerations you may have is whether the price fits your budget. Here is a complete guide to help you get an idea of aircon chemical wash prices in Singapore and the factors that affect them.

Overview of Chemical Wash Prices in Singapore

In general, an aircon chemical wash may cost around $80 for wall-mounted units to around $150 for portable, casement, or window units. However, keep in mind that this price is just an estimate and may be higher if your unit is very dirty or has not been cleaned in a long time. You may also be charged for additional services such as removing stubborn stains, addressing minor issues, or refilling the refrigerant, so be sure to check with your service provider to avoid any hidden costs.

In addition, a lower price does not necessarily mean better service. Do not be lured by an extremely low price, as it is more important to look for a service provider with good reviews and experienced technicians to handle your aircon unit professionally. You may also consider a service provider that provides service warranty for extra peace of mind, knowing that they can help resolve any unexpected issues that arise after the wash.

What is Included in the Price?

In general, the aircon chemical wash price includes the following services:

  • Inspection and diagnosis of your aircon unit’s overall condition, checking for any underlying issues
  • Thorough cleaning of key aircon components, including filters, coils, fan blades, and a drainage system
  • Removal of dust and debris
  • Application of cleaning chemicals
  • Full test run of your system before final handover

Are Chemical Wash Solutions Safe and Effective?

Wall-mounted aircon unit

To deeply clean aircon units, technicians use alkaline solutions to remove grime buildup. Additionally, acid-based solutions may be used to dissolve stubborn mineral deposits and mould, while biocides may be used to eliminate bacteria.

When applied by a professional technician, chemical wash solutions are safe and effective for your air conditioning components. This is especially true if your aircon unit has not been cleaned in a long time, and is experiencing dirt buildup, musty odour, or if your aircon is not cold.

During the chemical wash process, the technician will ensure to protect all electrical components of your aircon unit to avoid short circuits and system failures. They will also thoroughly rinse off these chemicals to prevent any residue.

If you still have concerns, verify with your service provider technicians that they are using appropriate, non-corrosive chemical solutions. A professional technician can also advise you of a suitable frequency to book a chemical wash, as too many washes within a short time may pose a risk and are often unnecessary for your aircon. Regular servicing and maintenance may help reduce the need for frequent chemical wash, keeping your home air cool and clean.

Factors That Affect Chemical Wash Price

Skilled technician cleaning aircon fins and vents during general servicing in Singapore

Several factors affect aircon chemical wash prices in Singapore, including:

Aircon Unit Type

Aircon units come in a variety of types that can influence the chemical wash price. Split-type aircon units may be less expensive compared to units with central air conditioning systems or ceiling cassette units. Factors such as the compressor type, refrigerant used, and the overall complexity of your unit’s design can determine the time and effort required for the whole cleaning process. More advanced models, such as those with energy-efficient systems, may have service costs due to the specific expertise needed to clean them.

Aircon Unit Size and Capacity

The size and capacity of your aircon unit can also affect the cost of a chemical wash. Larger units, such as those in commercial or industrial buildings, typically cost more to clean. In contrast, aircons in houses or flats are often more affordable to maintain.

Service Provider Price Variations

Different service providers may have a varied price list, so check accordingly and choose the one with the most sensible price. Also, some service providers may offer promotions or bundle packages that allow you to pay less if you book a number of services at once. Be sure to request a detailed quotation before booking a service.

Extent of Cleaning Needed

Older aircon units, or those with a heavy amount of dirt buildup, may cost more to clean due to the higher effort and materials required.

Frequency of Maintenance

To avoid needing hefty cleaning in the future, it is recommended to have regular inspections and maintenance for your aircon unit. Healthier aircon units are generally easier to clean, making each session faster and more affordable.

Is Chemical Wash Worth the Price?

An aircon chemical wash in Singapore may have a higher price point than general inspection or maintenance, causing you to be reluctant to book this service. However, a chemical wash is worth the price because it effectively removes stubborn dirt and enhances your unit’s performance and air quality. Handled by a professional service provider, chemical washes use specialised cleaning agents that keep your aircon unit running for a long time, reducing the risk of any major damage that requires more complex and costly repairs in the future.

Not sure whether to go for a chemical wash or chemical overhaul? Check out our comparison guide to help you decide.

Keep Your Aircon Unit Clean with Our Professional Service

The aircon chemical wash prices in Singapore depend on a number of factors, including your unit’s condition and the service provider itself. By engaging with a trusted team such as Cool-Aire, you can enjoy a cooler, more comfortable home with quality aircon maintenance.

Ready to keep your aircon unit performing at its best? Get in touch with Cool-Aire to book a chemical wash today!

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Why is Routine Aircon Servicing Important

Aircon technician repairing and inspecting wall-mounted indoor air conditioner unit

As the weather turns warmer this summer in Singapore, with temperatures ranging above 30 degrees, it is a common practice that we will switch our aircon on more frequently to combat the heat. Aircon has become a necessity for many households in Singapore.

Aircon in Singapore is one of more costly electronics in your home. While many of us tend to overlook the importance of routine aircon maintenance as homeowners ourselves, we believe that maintenance is cheaper than replacing your entire aircon since prices can easily range from $2,000-$5,000 depending on the brands and models.

Below, we will highlight some of the reasons why you should take action today to keep in your aircon in checked and maintained on a regular basis.

1) Electrical Bills

 

As most of us know, our aircon is one of the equipment’s in our home that consumes one of the most electricity. If your aircon is clogged with dust and dirt after an extended period of usage, your aircon will need to work harder just so you can experience the coolness.  This will indirectly cost a surge in your electricity bills.

A cleaned aircon functions at its optimal levels ensures your electricity bills remains reasonable.

2) Longevity Of Aircon

 

As we mentioned earlier, aircon is one of the most expensive electrical equipment in most of our homes. After extended periods of usage, wear and tear occurs and if parts are not replaced, it may lead to potential problems and ultimately, a broken aircon.

During the routine aircon maintenance, our aircon technicians will inspect and check to ensure your aircon performing at its optimal level.

How Often Should You Do Your Aircon Servicing?

 

As with all equipment, the higher the usage, the more often maintenance is required. Below is rough time frame of usage for your reference.

Regular Usage

If you use daily on an average of 6-8 hours daily, you will require to service your aircon on a more regular.

With higher usage, dust & dirt starts to accumulate and over time may decrease the efficiency of your air-conditioning.

For daily usage, we recommend general aircon servicing to be done on your aircon once every 3 months

Occasional Usage

For homeowners that use their aircon less often, you may choose to service your aircon on a longer interval.

For such cases, we recommend aircon chemical overhaul once every 2 years to ensure the longevity of the aircon

Can you do your own aircon servicing & maintenance?

 

For home owners who are more hands-on and willing to clean their air-conditioning, below are some information which you can use to clean your own aircon.

The process below will guide you on how you can do a basic maintenance on your aircon. These steps can be done by understand how you can access your fan coil which can be easily be done by lifting the cover on your aircon.

Various air-conditioning model may vary and it is recommended that you do a video search on youtube to understand the method to avoid damaging your air-conditioning.

Steps 1:
Gently lift the cover of your aircon and remove the filters

Step 2:
Thoroughly wash your filters with water and dry it before putting the filters back into your aircon

Step 3:
Check for any large particles of dirt that is visible on fan coil and gently use a vacuum to remove it. Do not use excessive force which may damage the fan coil

Step 4:
Place the removed filters(make sure they are dry) back into their original position and close the lit of your aircon

Conclusion

Aircon servicing is necessary as it ensures

1) The longevity of your aircon.

2) Clean aircon ensures that your aircon is operating at its optimal level which in turn helps reduce your unities bill.

3) Cleaner air circulation which is important if you have family members with sensitive nose

As the cost of air-conditioning rises, it is definitely cheaper to do aircon maintenance than to purchase a new aircon. On top of that, by keeping your aircon clean, you save on your electrical bills while ensuring that the air that is produced is cleaner for you & your family.

If having to maintain your aircon is a chore, why not hire an aircon servicing expert to help you?