Author: StringsSG

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

Is your aircon running out of refrigerant gas too soon? If so, there is a high possibility of gas leakage from the air conditioning system.

A well functioning AC is highly essential in Singapore’s hot and humid climate as it provides a comfortable living for people. Gas leakage from your aircon system is the most dreaded problem that you may encounter, which is quite expensive to deal with. Usually there are 2 routes that you can take when dealing with aircon gas leak:

• Pressure test to identify the leakage sites.
• Replace the air conditioning system with a completely new system.

Pressure test is advised if the air conditioning system is less than 5 years old, as most parts of the aircon might still be in good functioning state. If the system is older, you may consider a full replacement. In this article we will deep dive into the details of Pressure Test.

Aircon Pressure Test Prices in Singapore

The cost of pressure tests for air conditioning systems can vary due to a range of factors that are as diverse as the systems themselves. The size and type of your air conditioner play a significant role larger or more specialized units often require more extensive testing procedures. Additionally, the complexity of your air conditioning setup is a factor because intricate systems may necessitate more time and expertise for evaluation. The frequency of servicing also influences costs as regularly maintained equipment tends to be in better condition. Moreover, the overall cost of a package can fluctuate if it includes extra services such as thorough inspections or replacement of components.

For easy comprehension, here’s a simplified version of the price chart:

Pressure Test Price

Number of Unit	Price
1	S$250
2	S$350
3	S$450
4	S$550

Gas Leakage Repair

Number of Unit	Price
1	S$400
2	S$550
3	S$650
4	S$750

How To Perform Aircon Pressure Test For Gas Leakage

1. Assemble The Required Tools

Gather the tools like refrigerant, pressure gauge and safety gear such as gloves and goggles, to get ready.

2. Shut off The Cooling System

To reduce accidents, always begin by shutting off the air conditioning system, as they create a super safe environment for well-being.

3. Locate Service Ports

Find the low-pressure and high-pressure service ports on the AC system.

4. Connect Gauge

Attach the pressure gauge to the low-pressure service port. Make sure it’s securely connected.

5. Check Pressure

Turn on the AC and observe the pressure reading on the gauge. It should fall within the manufacturer’s recommended range.

6. Watch Out for Leaks

Any abrupt reductions in the pressure gauge should be taken note of, as they may point to a leak in the system.

7. Add Freon As Needed

In case of low pressure, add refrigerant according to the manufacturer’s instructions.

8. Record Results

Note down the pressure readings and any actions taken during the test for future reference.

8. Final Checks

Once the test is complete, double-check all connections and ensure everything is back in place.

10. Turn on AC

Turn the Aircon back on and verify that it’s working correctly after the pressure test.

Benefits of Aircon Pressure Tests

1. Identify Leakage Sites

It helps to identify multiple leakages site on the aircon system which may be causing the gas leakage.

2. Extended Life of Air Conditioning Units

Your cooling system will last longer if possible problems are found and fixed early on. This will also stop needless wear and strain.

3. Improved Indoor Air Quality

Running your air conditioner at full capacity encourages the flow of clean, filtered air, which is particularly helpful for those with respiratory or allergy issues.

4. Major Failure Avoidance

By spotting little problems before they develop into larger breakdowns, you can prevent expensive repairs and ensure ongoing comfort throughout the hot months.

Tips To Prevent Gas Leakage

1. To prevent blockages and pressure on the system, clean or replace the air filters every one to three months.
2. Regularly check for refrigerant leaks to preserve energy savings and cooling efficiency.
3. For cooling purposes, set your thermostat to 78°F. For energy economy, utilize programmed settings.
4. Maintain a clear space surrounding your air conditioner, and prune any trees or other obstructions to improve ventilation.
5. Plan yearly maintenance with HVAC experts to extend the life of your air conditioner and identify issues early.
6. Reduce the possibility of water damage and system faults by maintaining debris- and blockage-free condensate lines. This will ensure efficient drainage.

It is imperative to reevaluate the requirement for an air conditioning pressure test. Although it could appear like a standard process, in practice, it frequently doesn’t offer any meaningful insights into how the system works. Rather than requiring the additional expense and complexity of a pressure test, routine maintenance and visual inspections may usually resolve the majority of air conditioning problems. Your air conditioner will operate more efficiently and last longer if you priorities preventive maintenance and take quick action to fix visible problems.

The hot and humid climate of Singapore contributes to a very high usage of air conditioning in both residential and commercial premises. With high usage air conditioning comes problems associated with the aircon units, which has resulted in the registration of numerous aircon servicing companies under ACRA Singapore (Accounting and Corporate Regulatory Authority). In Singapore, there are more than 250 aircon cleaning companies who provide various kinds of air conditioner servicing based on your requirements.

Making the right decision about which air conditioning business to use for your needs can be somewhat challenging. This article will dive into what you should be looking for in a company before you choose them for your aircon service.

1. Reputation and Experience

Seek out air conditioning businesses with a strong track record and a wealth of industry expertise. Customers are more likely to be satisfied when a firm has a track record of success, and their history in the industry speaks volumes about their dependability. To determine the company’s reputation and degree of client satisfaction, look through testimonials and online reviews and get in touch with references.

2. Certifications and Licensing

Verify that the air conditioning company is licensed and certified to operate in Singapore. Licensed experts are more likely to abide by rules and guidelines in the field, giving you peace of mind about the caliber of their job. A dedication to excellence is also demonstrated by certifications from respectable trade associations.

3. Range of Services

Think about the variety of services the air conditioning firm provides. Do they offer services for installation, upkeep, and repair? A wide range of services guarantees that you can depend on the same business for all of your air conditioning requirements, which promotes a long-term relationship.

4. Technical Expertise

Examine the technicians’ level of technical proficiency. Are they skilled and informed about different brands and types of air conditioning systems? A skilled group can precisely identify problems, suggest workable fixes, and guarantee that installations are completed precisely.

5. Energy Efficiency Focus

Energy efficiency is vital in Singapore, where environmental consciousness is high on the agenda. Seek out air conditioning firms that give energy-saving solutions first priority. This can result in long-term energy bill savings in addition to lowering your carbon footprint.

6. Customer Service and Response Time

Analyze the company’s customer service provision. Fast reaction times and clear communication are crucial, particularly in case of emergencies or urgent repairs. A business that prioritizes customer satisfaction is more likely to pay close attention to your demands and immediately resolve any issues.

7. Transparent Pricing

Make sure pricing is transparent and request comprehensive quotes. Unpleasant surprises might result from unclear cost structures and hidden surcharges. Reputable air conditioning companies will provide you detailed, itemized quotes so you can see exactly what each service will cost you.

8. Warranty and Maintenance Contracts

Check the warranty offerings on installations and equipment. Additionally, inquire about maintenance contracts, as regular servicing is essential for the longevity and efficiency of your air conditioning system. Companies that offer comprehensive maintenance plans demonstrate a commitment to the ongoing performance of your system

StringsSG partners with some of the best aircon servicing companies in Singapore to provide you with high quality aircon servicing. Once you open a request on our web or mobile platform, the platform will assign a reliable aircon service contractor who can meet your requirements and budget.

Have you started to notice black patches or mold on the aircon trunking? These are early signs of condensation on the trunking which can eventually lead to water dripping, if not fixed.

AC trunking refers to the network of ducts, pipes, and channels that distribute cooled or heated air throughout a building. In this article, we bring to you the reasons behind condensation on AC trunking and explore potential solutions to this fix the problem.

1. Poor Insulation

Insufficient or damaged insulation on AC trunking can lead to temperature imbalances, fostering condensation. Insulation acts as a barrier, preventing the transfer of heat between duct surfaces and surrounding air.

Solution: Regularly inspect AC trunking insulation, repairing or replacing damaged sections as needed. Upgrading to higher-grade insulation enhances the effectiveness of the barrier, minimizing condensation risks.

2. Air Leaks

Air leaks in the ductwork contribute to condensation by allowing warm, humid air to enter and contact cooler surfaces. Leaks can also compromise insulation efficiency.

Solution: Promptly seal any air leaks in AC ducts. Regular inspections and maintenance help identify and address leaks, preserving the system’s integrity and preventing condensation issues.

3. Improper Installation Of Trunk

If the aircon trunks are not installed correctly, water from your air conditioner might drip into the trunk, causing it to get wet and form condensation. There should not be any loose connection between the aircon unit and the trunk from water can slip through.

Solution: In most cases the solution is to re-install the trunks and ensure that the trunks correctly fit and align with the aircon units.

4. Trap Floor Blockage

A floor trap blockage can contribute to condensation on AC trunking through a combination of factors related to restricted drainage and increased humidity.

A floor trap is designed to allow the drainage of water. When the floor trap is blocked, water drainage becomes impeded. If your air conditioning unit produces condensate (water formed during the cooling process), a blocked floor trap can prevent the proper drainage of this water and hence cause water leakage.

Solution: Engage a professional aircon technician to clear the blockage in the floor trap, ensuring proper drainage.

Final Thoughts

AC trunking, comprising the network of ducts and channels, plays a vital role in the functioning of air conditioning systems. Understanding and addressing condensation issues through regular inspection, maintenance, and the use of quality insulation materials are crucial steps in ensuring the efficiency and longevity of AC systems. By implementing the suggested solutions, users can maintain a comfortable and well-regulated indoor environment, free from condensation-related challenges.