Category: HVAC Services

In Singapore’s hot and humid climate, having a working aircon isn’t a luxury, it’s a necessity. Whether you live in an HDB flat, a condo, or a landed property, chances are your aircon is working overtime to keep you cool. But many homeowners overlook one crucial thing: regular aircon servicing.

Think of your aircon like your car. You wouldn’t drive it endlessly without servicing it, right? The same logic applies. Regular aircon servicing keeps your unit running efficiently, helps you save money, improves indoor air quality, and prevents costly breakdowns.

Here’s everything you need to know about why aircon servicing in Singapore is so important, how to monitor your aircon for problems, and when to call the experts.

Why Aircon Servicing Is So Important for Singapore Homes

1. Saves You Money in the Long Run

A well-maintained aircon doesn’t have to work as hard to cool your space. This means lower electricity bills, which is especially helpful with Singapore’s rising energy costs. If your aircon is clogged with dust or its components are worn out, it draws more power to produce the same amount of cooling, which shows up in your monthly bill.

2. Keeps Your Aircon Running Efficiently

Regular aircon cleaning ensures filters, coils, and other components are cleaned and functioning well. When everything works as it should, your aircon cools your home faster and more efficiently, even during the peak afternoon heat.

3. Prevents Unexpected Breakdowns

A breakdown during Singapore’s sweltering months is every homeowner’s nightmare. Routine servicing helps catch small issues like refrigerant leaks, clogged filters, or worn-out parts before they snowball into bigger, more expensive problems.

4. Improves Indoor Air Quality

Dirty air filters and components can harbour dust, bacteria, and mold (not ideal for your family’s health). This is especially important in Singapore, where many homes are closed up with little natural ventilation. Regular servicing helps your aircon circulate clean, fresh air.

5. Prolongs the Lifespan of Your Aircon

Aircons aren’t cheap, and replacing them is a significant expense. Regular servicing ensures your unit lasts as long as possible, giving you better value for your investment.

How to Monitor Your Aircon for Potential Problems

Even with regular professional servicing, keeping an eye (and ear) on your aircon is good. Here are common warning signs to look out for:

1. Weak Cooling

If your aircon doesn’t cool your space as effectively as it used to, it could indicate clogged filters, low refrigerant levels, or a mechanical fault.

2. Strange Noises

Unusual sounds like banging, hissing, or grinding are red flags. These noises could point to loose parts, debris build-up, or refrigerant leaks that require professional attention.

3. Water Leaks

If you notice water pooling below your aircon or dripping from the unit, there may be a blocked drainpipe or a full drainage tray.

4. Bad Odours

A musty or foul smell coming from your aircon is a tell-tale sign of mold or bacteria growing inside the system — not something you want circulating in your home.

5. Higher Electricity Bills

A sudden spike in your utility bill, without any increase in usage, often signals your aircon is working inefficiently. Which means, it’s only time to book that servicing appointment!

How Often Should You Service Your Aircon in Singapore?

The frequency depends on how often you use your aircon and where you live:

Usage	Recommended Servicing
Light Use (e.g., 1-2 times a week)	Every 6 months
Moderate Use (e.g., daily, nights only)	Every 3-4 months
Heavy Use (e.g., daily, day & night)	Every 2-3 months
Commercial or Office Aircons	Monthly or based on technician advice

Most households benefit from servicing HDB flats or condo units every 3-4 months, especially if the aircon runs nightly. If you have multiple units or live in a landed property, coordinate servicing for all units to optimise efficiency.

When to Call a Professional Aircon Technician

While basic maintenance like cleaning filters can be done yourself, certain tasks require an expert’s touch:

• Strange noises or smells from the unit.
• Persistent water leaks.
• Weak or no cooling despite correct settings.
• Regular servicing is overdue.
• You suspect a refrigerant leak.

Tip: Avoid DIY repairs for complex aircon problems. Tampering with electrical components or refrigerant can be dangerous and may void your warranty.

What Happens During a Professional Aircon Servicing?

A typical servicing session includes:

✔️ Cleaning of air filters, front panel, and cover.

✔️ Vacuuming of drainage system to prevent leaks.

✔️ Checking fan motor, blower, and electrical connections.

✔️ Inspecting refrigerant levels and cooling performance.

✔️ Testing the aircon to ensure everything runs smoothly.

Consider a chemical wash or overhaul for more thorough maintenance, especially for older or heavily-used units.

Final Thoughts

Your aircon works hard to keep your home cool and comfortable, so it deserves some TLC in return. Regular servicing keeps your cooling system running efficiently, protects your family’s health, reduces electricity costs, and prevents inconvenient breakdowns.

Living in Singapore’s tropical climate means your aircon is likely running daily. Don’t wait until there’s a problem… book regular servicing and enjoy peace of mind all year round!

In Singapore’s sweltering heat, your aircon is more than just a luxury; it’s a daily essential. But constant use and poor maintenance can cause your aircon to overheat. When that happens, it can result in poor cooling performance, higher energy bills, expensive repairs, or a complete system breakdown.

If you want to keep your home cool and your aircon running efficiently, prevention is key. In this guide, we share with you the top seven practical tips to help prevent your aircon from overheating and ensure it performs at its best for years.

1. Clean or Replace Air Filters Regularly

Clogged air filters are one of the most common causes of aircon overheating. In Singapore’s humid climate, dust and dirt build up quickly. When the filters are blocked, airflow is restricted, forcing the aircon to work harder to circulate cool air.

Check your air filters at least once a month. If they appear dirty, clean them under running water and let them dry completely before reinstalling. Consider replacing filters every few months for homes with pets, smokers, or frequent aircon use.

2. Keep the Outdoor Unit Clean and Unobstructed

Your aircon’s outdoor condenser unit is crucial in releasing heat from the system. If the condenser coils are covered with dust, leaves, or other debris, heat cannot escape efficiently, causing your aircon to overheat.

It’s crucial to,

• Inspect the outdoor unit regularly.
• Clear away leaves, dust, and any debris.
• Maintain at least one metre of clearance around the unit for proper ventilation.

In Singapore’s high-rise apartments, where space is tight, ensure balcony plants, laundry racks, or furniture don’t block the airflow.

3. Schedule Regular Professional Servicing

Even with DIY cleaning, there are areas of your aircon you can’t easily access. Over time, dirt builds up inside components like the evaporator coils and fan motor, contributing to overheating.

Book professional aircon servicing at least once every 6 months. During servicing, the technician will clean internal components, check for signs of wear, and ensure your aircon is running optimally.

4. Consider a Chemical Wash for Deep Cleaning

If regular servicing isn’t enough, a chemical wash can help remove stubborn dirt, bacteria, and mold that build up deep inside your aircon.

When the system is clogged, airflow is restricted, forcing the motor and compressor to work harder, leading it to overheat.

Arrange for a chemical wash every 12 to 18 months, especially for older units or those not serviced regularly. It’s a deep cleaning process where components are dismantled and thoroughly cleaned with specialised solutions to restore cooling efficiency.

5. Maintain Proper Ventilation Around Your Aircon

Indoor and outdoor units need adequate ventilation for your aircon to cool efficiently. Poor ventilation can trap heat inside the system, causing it to overheat.

These could help:

• Keep curtains or blinds closed during peak sunlight to reduce the room’s heat load.
• Ensure the aircon’s vents and grilles are not blocked by furniture or large objects.
• Avoid placing the outdoor unit in a confined or poorly ventilated space.

Good ventilation means your aircon doesn’t have to work overtime to keep your space cool.

6. Monitor for Early Warning Signs

Overheating rarely happens suddenly. Your aircon often gives warning signs before serious damage occurs. The key is to recognise these signs early and act before it worsens.

Look out for these overheating indicators:

✔️ Warm air blowing from the vents.

✔️ Frequent system shutdowns.

✔️ The outdoor unit feels excessively hot.

✔️ A buzzing or humming sound from the compressor.

✔️ Unusual spikes in your electricity bill.

If you notice any of these, switch off your aircon immediately and call a professional for inspection.

7. Don’t Overwork Your Aircon

Running your aircon non-stop or setting the temperature to the lowest possible setting may seem like a good way to beat the heat—but it puts immense strain on the system. This constant strain leads to overheating, higher energy consumption, and faster wear and tear.

You can,

• Set your aircon to an energy-efficient temperature of around 24-25°C.
• Use a fan alongside your aircon to help circulate cool air.
• Turn off your aircon when you leave the room.
• Give the system short breaks throughout the day to prevent overuse.

If your aircon is too small for your space, it will sometimes struggle to cool effectively, leading to overheating. Speak to a technician to ensure your aircon is correctly sized for your room.

Bonus Tip: Upgrade When Necessary

Older aircon units overheat more frequently due to worn-out components and outdated technology. Consider an upgrade if your aircon is over 10 years old and constantly overheating despite maintenance.

Modern aircons are designed to be more energy-efficient, quieter, and better equipped to handle Singapore’s tropical climate without overworking.

Final Thoughts

Preventing aircon overheating isn’t just about keeping your home cool, it also saves you money, extends the lifespan of your system, and prevents unnecessary breakdowns.

By following these seven tips — cleaning filters, maintaining the outdoor unit, scheduling regular servicing, opting for chemical washes, ensuring proper ventilation, spotting warning signs, and avoiding overuse — you can enjoy efficient, reliable cooling all year round.

If your aircon still shows signs of overheating despite your efforts, don’t delay. Call a trusted aircon technician in Singapore to diagnose the issue and get your cooling system back on track.

Looking for reliable PRISM+ aircon servicing in Singapore? At StringsSG, we specialize in comprehensive PRISM+ aircon maintenance, repair, and cleaning to keep your cooling system running efficiently. Our team of skilled and certified technicians is experienced in handling all models of PRISM+ air conditioners, ensuring optimal performance, energy efficiency, and long-term durability.

Whether you need a general aircon servicing, chemical wash, or urgent aircon repair, we provide prompt and professional solutions tailored to Singapore’s climate and housing needs. Book your PRISM+ aircon service easily online and enjoy cool comfort with peace of mind.

General Aircon Service Pricing

StringsSG offers the most affordable and transparent aircon servicing pricing in Singapore.

One-Time Servicing

No. of Aircons	Pricing
1 AC unit	SGD 43.24
2 AC unit	SGD 51.34
3 AC unit	SGD 65.50
4 AC unit	SGD 79.67
5 AC unit	SGD 89.24
more than 5	Open a request

Annual Package

No. of Aircons	4 times/year	3 times/year
1 Units	SGD 167.77	SGD 125.83
2 Units	SGD 197.13	SGD 147.85
3 Units	SGD 248.92	SGD 186.69
4 Units	SGD 299.57	SGD 224.68
5 Units	SGD 331.97	SGD 248.98
more than 5	Open a request	Open a request

Gas Top-Up Pricing

Gas Type	Price (SGD)
R22	SGD S$40 – S$100
R410A	SGD S$90 – S$150
R32	SGD S$120 – S$220

Aircon Chemical Wash Pricing

Ensure your air conditioner is clean and germ-free with our annual chemical wash. Learn more about Basic Chemical Wash & Overhaul

Chemical Wash Price

No. of Aircons	Pricing
1 AC unit	SGD 77.28
2 AC unit	SGD 150.70
3 AC unit	SGD 206.72
4 AC unit	SGD 262.75
5 AC unit	SGD 318.78
more than 5	Open a request

Chemical Overhaul Price

No. of Aircons	Pricing
1 AC unit	SGD 145.36
2 AC unit	SGD 283.45
3 AC unit	SGD 388.84
4 AC unit	SGD 494.22
5 AC unit	SGD 599.61
more than 5	Open a request

Our 6-Step Aircon Servicing Process

At StringsSG, we follow a proven 6-step approach to general aircon servicing in Singapore — ensuring your unit runs efficiently and reliably.

1. Air Filter & Front Panel/Cover Cleaning

Dirty air filters can block airflow and strain the aircon. Technicians clean or jet-wash filters to restore optimal airflow.

2. Cleaning of Evaporator Coil

The evaporator coil can collect dirt, reducing efficiency. The technician cleans it using a soft brush or vacuum.

3. Drain Pan or Tray Cleaning

Clogged drain pans may lead to leaks. Technicians clean out debris from the pan to ensure proper drainage.

4. Vacuuming of Drainage Pipe

To prevent water backup, the drainage pipe is vacuumed to remove blockages that may disrupt water flow.

5. Outdoor Condenser Check

Technicians assess the outdoor unit’s performance and recommend cleaning if necessary, based on inspection or customer request (extra charges may apply).

6. Monitor Refrigerant Gas Level

Technicians check the refrigerant gas level if poor cooling is observed or upon client request, and may recommend top-up if needed.

Watch the Step-by-Step Servicing Video

Service Warranty

Enjoy comprehensive workmanship warranty coverage with every Prism+ aircon service. We’re committed to quality and stand behind our work, so you can stay cool and worry-free.

Latest Prism+ Aircon Models in Singapore

While PRISM+ air conditioners are built with cutting-edge technology for reliable cooling and energy efficiency, occasional error codes can occur due to environmental or operational factors. Understanding these common error codes can help users troubleshoot minor issues or know when to book a service.

Here are some of the most frequently encountered PRISM+ aircon error codes and their meanings:

• E1 – Indoor Unit Fault
  This usually points to issues with the indoor unit’s sensors or PCB (Printed Circuit Board). A quick reset may help, but persistent errors should be inspected by a professional.
• E5 – Communication Error
  This code signals a disruption between the indoor and outdoor units. Loose wiring or PCB faults are common causes and require technical diagnosis.
• F0 – Low Refrigerant or Refrigerant Leak
  When your PRISM+ aircon displays F0, it often indicates a refrigerant-related issue. This affects cooling efficiency and should be addressed promptly.
• H3 – Compressor Overload
  Caused by high temperatures, dirty filters, or power supply issues, this error protects the compressor from damage. Routine servicing helps prevent this.
• U8 – Indoor Unit and Outdoor Unit Connection Error
  Often due to voltage fluctuations or installation issues. This code may appear during startup and usually requires a service check.

Note: Panasonic aircon error codes may vary depending on your unit’s model and series. If you encounter one of these codes, our licensed technicians can help diagnose and resolve the issue quickly and safely.

Why These Codes Matter
Ignoring error codes can lead to higher energy bills, poor cooling performance, and even long-term damage. PRISM+ recommends periodic maintenance to ensure smooth operation and to catch potential issues early.

Need Help with an Error Code?
Our experienced PRISM+ servicing team in Singapore is equipped to diagnose and resolve all system alerts efficiently. Whether it’s a simple reset or a component replacement, we’ll restore your aircon’s performance quickly and affordably.

An aircon chemical overhaul is a more intensive version of chemical cleaning, designed for heavily clogged or underperforming units. It involves complete dismantling of the system and deep-cleaning each component individually using specialized chemicals.

Here are the 9 essential steps followed by professionals during a chemical overhaul:

1. Inspection and Preparation

The process begins with a careful inspection of the aircon unit:

• The technician checks the cooling efficiency, noise levels, airflow, and visible dirt accumulation.
• Protective sheets are laid out to cover your flooring and nearby furniture to prevent any water or chemical splashes during the overhaul.
• The electrical power to the unit is safely turned off.

2. Full Dismantling of the Aircon Unit

In a chemical overhaul, the entire fan coil unit (FCU) is removed from the wall:

• The technician disconnects the electrical connections and drainage pipe.
• The aircon casing, fan blower, and evaporator coil are separated completely from the indoor wall.
• This allows complete access to internal components that are usually unreachable during a standard wash.

🛠️ This step requires experience and should only be done by trained professionals to avoid damage.

3. Disassembly of Components

With the unit taken down, all internal parts are carefully dismantled for separate cleaning:

• Evaporator coil (cools the air)
• Blower wheel (circulates air)
• Drain pan (collects condensation)
• Fan motor and casing

Delicate components such as the PCB (circuit board) are safely covered or removed before chemical treatment.

4. Intensive Chemical Cleaning

Each part is soaked or sprayed with a high-strength chemical solution designed to:

• Break down grease, mold, and hardened dirt
• Eliminate bacteria, dust mites, and allergens
• Restore original airflow and cooling performance

Components are then rinsed thoroughly with water to remove chemical residues and allowed to dry completely.

5. Drainage System Flushing

A clogged drainage pipe is a leading cause of water leakage:

• The technician flushes the drainage system using a pressure pump or manual method to remove clogs.
• Algae, slime, and mineral buildup are cleared, ensuring smooth water flow during operation.

⚠️ Severely blocked pipes may require additional service and charges.

6. Outdoor Condenser Servicing

The outdoor unit, often neglected, is thoroughly cleaned:

• Fins and coils are brushed or vacuumed to remove leaves, dirt, and dust.
• A light water jet may be used to clean the fan and exterior.
• Condenser cleaning improves heat dissipation and reduces the compressor’s workload.

7. Lubrication of Fan Bearings

After cleaning, fan bearings and motor components are lubricated to ensure smooth rotation and reduce friction:

• This helps eliminate humming or squeaky noises.
• Prevents premature wear and tear of moving parts.

8. Refrigerant Gas Level Check

Using pressure gauges, the technician checks the refrigerant gas level:

• If it’s too low, your aircon won’t cool effectively.
• If a leak is suspected, further testing may be required.
• Gas top-up is usually charged separately and done only if needed.

9. Reinstallation and Performance Testing

Once all parts are cleaned and dried:

• The unit is reassembled and securely mounted back on the wall.
• All electrical and drainage connections are reattached.
• A final test is conducted to ensure:
  • Cold air is blowing properly
  • Drainage is smooth
  • The unit is quiet and vibration-free

You’ll immediately notice improved cooling, reduced noise, and cleaner-smelling air.

Why Opt for a Chemical Overhaul Over Regular Servicing?

Chemical Wash	Chemical Overhaul
Partial cleaning	Full disassembly
Keeps unit clean	Restores like-new performance
Less time-consuming	Longer duration (60–90 mins)
For light-to-moderate dirt	For heavily clogged or old units

Aircon chemical washing is a deep-cleaning procedure performed by experienced technicians to restore cooling efficiency, prevent system breakdowns, and extend the lifespan of your unit. Below is a step-by-step guide to how professionals carry out this intensive cleaning service:

1. Inspection and Preparation

Before starting, the technician inspects the aircon unit to assess the cleaning requirements. This helps identify visible dirt buildup, mold presence, and signs of leakage or inefficiency.

Power to the unit is turned off to ensure safety during the procedure.

Furniture, walls, and flooring around the aircon are carefully covered with protective sheets.

2. Disassembly of Components

The technician carefully dismantles key components of the aircon system to gain access to the internal parts that need cleaning:

• Front panel
• Air filters
• Fan coil unit (FCU) cover
• Drain pan

This allows a thorough reach into all areas where dirt and grime accumulate.

3. Chemical Application on Internal Components

A specially formulated chemical solution is applied to dissolve accumulated contaminants such as:

• Mold and mildew
• Dust and dirt
• Bacteria and allergens

These chemicals are safe when handled by professionals and are rinsed off completely to avoid residue.

4. Cleaning the Drainage System

Clogged drainage pipes are a common cause of leaking aircons. The technician will:

• Flush and clean the drainage system
• Remove slime, algae, and debris
• Ensure smooth water flow to prevent future blockages

⚠️ Note: Drainage cleaning may incur additional charges depending on the condition.

5. Outdoor Condenser Cleaning (extra charges may apply)

The outdoor condenser unit, which supports the cooling process, is often overlooked in basic servicing.

• A brush and vacuum are used to clear debris and dust from the condenser fins and fan.
• In some cases, a jet spray is used.
• A clean condenser improves efficiency and reduces power consumption.

6. Monitor and Top-Up Refrigerant Gas (If Needed)

The technician checks the refrigerant gas level to ensure optimal cooling performance:

• If the gas is low, it may cause weak or no cooling.
• A pressure gauge or manifold set is used for accurate readings.
• You will be advised if a gas top-up is necessary.

7. Reassembly and Functional Testing

Once cleaning is complete:

• The unit is reassembled with all parts securely fixed.
• A new or cleaned filter is installed.
• The aircon is powered on and tested for:
  • Cooling performance
  • Unusual noise or vibration
  • Proper airflow and drainage

🌬️ Why Choose a Professional Aircon Chemical Wash?

Getting a chemical wash done by a professional ensures your aircon:

• Runs more efficiently
• Saves electricity
• Improves indoor air quality
• Lasts longer without major repairs

💡 Experts recommend a chemical wash every 6 to 12 months, depending on your usage and environment.

In tropical climates like Singapore, air conditioners are essential for daily comfort. But over time, dust, mold, and grime can build up inside your unit, leading to reduced cooling performance and higher energy bills. A chemical wash is one of the most effective ways to restore your aircon’s efficiency and improve indoor air quality.

While a full chemical overhaul is best left to professionals, a careful DIY aircon chemical wash can help you maintain your unit in between servicing—saving you money and extending its lifespan.

Follow these 8 essential steps to perform your own aircon chemical wash safely and effectively:

1. Safety Precautions

Before you begin, gear up for protection. Wear gloves, goggles, and a face mask to shield yourself from dust and cleaning chemicals. Make sure the area is well-ventilated and that you have all tools and cleaning solutions ready.

2. Turn Off the Power

Always switch off the power supply at the circuit breaker before working on your air conditioner. This is a critical step to prevent electrical shock or short-circuiting during cleaning.

3. Clean the Exterior

Start by wiping down the outer casing of your indoor unit using a damp cloth or sponge. Remove dust, grime, and any loose dirt. Be gentle around delicate fins and avoid pressing too hard on plastic covers or vents.

4. Remove and Clean the Filter

Open the front panel and remove the air filter.

• For light cleaning: Rinse under water or use a handheld vacuum.
• For deeper cleaning: Use a mild detergent or Biget spray (a popular cleaner) and rinse thoroughly in the bathroom.

5. Clean the Evaporator Coils

The evaporator coils inside your aircon absorb heat and are key to cooling. If they’re dirty, your system will struggle to cool effectively.

• Carefully remove the front panel to access the coils.
• Spray a chemical coil cleaner onto the coils and let it sit as instructed (usually 5–10 minutes).
• Rinse off with clean water—avoid spraying directly on wires or electronic parts.

Note: If your evaporator coils are heavily caked with dirt, consider calling a technician for a full chemical overhaul.

6. Clean the Condenser Unit (Outdoor Unit)

Head outside to your condenser unit (usually located on the ledge, balcony, or rooftop).

• Use a hose or low-pressure washer to gently clean the condenser coils and fins.
• Remove any leaves, dust, or debris around the unit to maintain proper airflow.
• Be careful not to bend the delicate aluminum fins.

7. Clear the Drainage System

A clogged drainage pipe can cause leaks or foul smells. Locate the drainpipe and use a brush, pipe cleaner, or a flush of warm water and mild bleach to clear any blockages. Ensure water flows freely out of the drain outlet.

8. Reassemble and Test

Once everything is clean and dry:

• Reinstall the air filter and any panels you removed.
• Restore the power at the breaker.
• Turn on your aircon and let it run for 15–20 minutes.

Observe for strong airflow, no abnormal sounds, and steady cooling. If everything checks out—you’ve just completed a successful DIY chemical wash!

When To Call A Professional

While DIY maintenance can go a long way, some issues require expert attention. Contact a professional if:

• Cooling is still weak after cleaning
• Persistent moldy or chemical odors remain
• Your aircon leaks or makes strange noises
• You haven’t serviced your unit in over a year
• You’re unsure about handling internal components

Final Thoughts

Doing your own aircon chemical wash isn’t as intimidating as it sounds—with the right precautions and step-by-step approach, it’s a rewarding way to keep your unit running efficiently.

Regular maintenance like this can extend your aircon’s lifespan, improve indoor air quality, and help you avoid costly repairs. Just remember: when in doubt, get help from a certified technician.