Aircon Parts Ultimate Guide (2025 Edition for Singapore Homes)

Keeping your air conditioning system in top condition starts with understanding its many aircon parts. Every component—from the compressor and condenser coil to the blower fan and air filter—plays a crucial role in maintaining your comfort at home despite Singapore’s hot weather conditions.

This comprehensive guide explains what are the main parts and components of an air conditioner, how they work, and when they need replacement.

Whether you’re maintaining your air at home, an office space, or a commercial unit, knowing your system’s parts helps you prevent breakdowns, choose the right spare parts, and enjoy efficient cooling year-round.

Quick Takeaways

✅ Understanding your aircon parts helps you save on repairs — Knowing each component allows you to detect early faults and avoid costly issues with air conditioners and air conditioning units.

✅ Regular cleaning boosts cooling performance — Clean filters, coils, and vents improve airflow and temperature control by up to 20%, keeping your room cool in Singapore’s tropical weather conditions.

✅ Use genuine replacement products — Original air conditioner parts from trusted brands such as Daikin, Mitsubishi, Panasonic, and Fujitsu ensure durability, safety, and better quality.

✅ Professional servicing is essential — Complex parts like the compressor, PCB circuit board, and refrigerant system should be handled by licensed technicians in Singapore for reliable operation.

✅ Reliable maintenance brings lasting comfort — Routine servicing, filter cleaning, and checking copper pipes or drain pipes extend lifespan, reduce bills, and improve your indoor air quality.

What Are the Main Parts of an Aircon System?

Your air conditioning system consists of two main units: the indoor unit, which cools and circulates air inside your room, and the outdoor unit, which releases heat into the environment. Together, they circulate refrigerant, regulate room temperature, and remove humidity from the air.

Indoor Unit vs Outdoor Unit

• The indoor unit handles air circulation and temperature delivery through components like the evaporator coil, blower motor, and air filter.

• The outdoor unit contains heavier components such as compressors, condenser coils, fan motors, and copper pipes that transfer heat outdoors.

Both units work together as part of a closed air conditioning system that transforms warm air into cool, breathable comfort inside your home.

Compressor — The Heart of the Aircon

The compressor is the powerhouse of the aircon unit, compressing refrigerant gas into high pressure before releasing it into the condenser coil. It’s one of the most expensive parts in air conditioning systems and crucial to cooling efficiency.

A faulty compressor can cause weak cooling, strange noises, or a total shutdown of the aircon. Replacements in Singapore typically cost $500–$900, depending on the brand and model number of the system.

Condenser Coil — Releases Heat Outside

The condenser coil is responsible for releasing the heat absorbed from inside your room into the outside environment. Dirt and corrosion on the coil can trap heat and reduce efficiency.

Always keep the coil clean using a specialized air conditioner cleaner or brands like McKenic. Avoid bending cooling fins, and schedule a service twice a year to maintain optimal performance.

Evaporator Coil — Cools the Air Inside

The evaporator coil evaporator works within the indoor air conditioning unit, absorbing heat from your air and converting it into cool air through the refrigerant process. When the aircon is not cold, it’s often due to a dirty or frozen coil.

A professional aircon service can inspect and clean this component, ensuring smoother airflow and reducing the buildup of bacteria and mold.

Expansion Valve — Controls Refrigerant Flow

The expansion valve is a small yet vital component that controls the amount of refrigerant flowing into the evaporator coil to maintain efficient cooling. It maintains the right temperature and pressure balance, preventing frost buildup and maintaining steady comfort levels throughout your space.

When this valve fails, your air conditioner may blow warm or inconsistent air, signaling the needs for inspection or replacement.

Air Filter — Traps Dust and Dirt

Every air conditioning system includes an air filter that removes dust, allergens, and particles from the air before it’s recirculated. In humid Singapore, filters need cleaning every one to two months.

Reusable filters can be washed with water, while disposable items cost between $10–$30 depending on brand and quality. Dirty filters not only block airflow but also cause the blower motor to work harder, wasting energy.

Fan Motor & Blower Fan — Circulates Air Efficiently

The fan motor powers the blower fan the system depends on to push cool air through your home. When it becomes noisy or sluggish, airflow weakens. Replacing fan motors in Singapore ranges from $100–$250, depending on types and brands.

Keeping the blower motor lubricated and free of dust improves quality air delivery and prolongs your air conditioning system lifespan.

Drain Pipe — Removes Condensation Water

During cooling, condensation water forms and must be drained through a PVC drain pipe connected to the indoor unit. When blocked by dirt or mold, you’ll notice water leakage around the aircon vent.

You can flush the drain pipe yourself using WD-40 or a vacuum pump, but persistent leaks often indicate a deeper issue in the system that requires professional servicing.

PCB Circuit Board — The Brain of the Aircon

The PCB circuit board (also known as the isolator switch or controller board) is the electrical control center of the system, managing fan speed, temperature settings, and timing.

If your aircon doesn’t respond to controllers, or if the unit fails to start, the circuit board might be damaged. A new board costs $80–$150 depending on the brand and model number.

Never attempt to repair the circuit board yourself—it’s best left to trained air conditioning technicians familiar with the process and safety standards in Singapore.

Thermostat & Controllers — Adjusting Your Comfort

The controllers and thermostat are what let you fine-tune room temperature to your liking. They communicate directly with the PCB board to ensure precise temperature control.

If your controller fails, check the batteries first. If unresponsive, replacements are widely available in Singapore, often bundled with accessories like aircon brackets, remotes, or sensor products.

How All Aircon Parts Work Together

The entire air conditioning process works in a loop:

1. The compressor compresses refrigerant gas.

2. The condenser coil releases heat outdoors.

3. The expansion valve cools the refrigerant.

4. The evaporator coil absorbs indoor heat.

5. The blower fan and fan motor distribute cool air through the aircon vents.

6. The drain pipe removes condensation water, maintaining a dry and clean space.

This system ensures seamless cooling and stable room temperature, creating a more comfortable environment in Singapore homes.

Common Aircon Parts That Need Replacement

Aircon Part	Common Issue	Replacement Cost (SGD)	Frequency
Air Filter	Clogged with dust	$10–$30	Every 1–2 months
PCB Circuit Board	Unit not responding	$80–$150	Every 3–5 years
Fan Motor	Noisy or weak airflow	$100–$250	Every 4–6 years
Compressor	No cooling	$500+	Every 6–10 years
Remote / Controllers	Unresponsive	$20–$50	As needed
Drain Pipe	Leakage	$30–$80	Every 3–4 years

If you notice any of these symptoms, you need to book an air conditioning service to replace or repair the affected parts before they worsen.

Signs Your Aircon Parts Need Servicing

• Weak cooling — may involve dirty coils or low refrigerant.

• Water leakage — clogged drain pipe or broken isolator switch.

• Unusual noises — worn blower motors or fan imbalance.

• Strange smell — mold buildup in the air conditioning unit.

• Uneven cooling — the aircon may have blocked filters or loose copper pipes.

Timely aircon servicing not only improves performance but also enhances the quality of air in your home.

Where to Buy Aircon Parts in Singapore

You can find a wide range of spare parts for different brands and air conditioning systems across Singapore:

• Authorized Service Centres – For original Daikin, Mitsubishi, Fujitsu, or Panasonic air conditioning parts.

• Local Hardware Stores – For general items like filters, drain pipes, and cleaning products.

• Online Platforms – Shopee, Lazada, and Qoo10 carry smaller parts and accessories.

• Professional Technicians – 338 Aircon Singapore supplies genuine spare parts, offers islandwide delivery, and installs everything from compressors to aircon brackets safely.

You can contact 338Aircon.sg for expert recommendations and on-site service today.

DIY Aircon Maintenance vs Professional Servicing

Basic maintenance, such as cleaning filters, air vents, and controllers, is safe for DIY. However, major components—like compressors, expansion valves, or copper pipes—should only be handled by professionals.

Licensed technicians in Singapore follow a strict process when handling refrigerant gas, ensuring the cooling system runs safely and efficiently under local weather conditions.

Energy Efficiency and Comfort

Clean air filters, unobstructed coils, and stable fan motors keep the air conditioning system performing efficiently. Using eco-friendly refrigerant types like R32 or R410A helps maintain indoor comfort while saving energy.

A well-serviced system reduces strain on the aircon, maintains consistent room temperature, and prolongs the lifespan of all air conditioning parts.

Aircon Parts Glossary (A–Z)

Part Name	Function	Maintenance Tip	Average Lifespan
Air Filter	Traps dust & dirt	Clean monthly	1–2 years
Blower Fan	Circulates cool air	Wipe blades regularly	5–6 years
Compressor	Pumps refrigerant	Avoid overloading	8–10 years
Condenser Coil	Releases heat	Clean every 6 months	10 years
Drain Pipe	Removes condensation water	Flush yearly	3–4 years
Evaporator Coil	Absorbs heat	Chemical wash yearly	8–10 years
Expansion Valve	Regulates refrigerant flow	Service every 2 years	6–8 years
PCB Circuit Board	Controls functions	Keep dry	4–6 years
Thermostat & Controllers	Adjust temperature	Replace batteries	5–7 years
Copper Pipes	Carries refrigerant	Inspect for leaks	10+ years

Frequently Asked Questions (FAQ)

Q: What are the main components of an air conditioning unit?

A: The essential parts include the compressor, condenser coil, expansion valve, and evaporator coil. They regulate temperature and circulate air efficiently.

Q: How often should I clean or replace filters?

A: Every 1–2 months, depending on weather conditions and usage. Clean filters enhance air quality and system efficiency.

Q: Can I repair my aircon myself?

A: You can clean air filters and vents, but repairs involving refrigerant, circuit boards, or compressors should be handled by certified technicians.

Q: Where can I buy aircon parts in Singapore?

A: From authorized brands, local hardware stores, or 338 Aircon Singapore, which offers a wide range of parts, delivery, and expert installation services.

Q: What affects the lifespan of the air conditioning system?

A: Regular servicing, clean filters, balanced airflow, and protection from outdoor weather conditions extend the life of your units.

Conclusion

A reliable air conditioning system depends on the health of every component—from the compressor and blower fan to the PCB circuit board and drain pipe. Understanding your aircon parts helps you detect problems early, maintain performance, and ensure lasting comfort in your home.

Book your professional aircon servicing or replacement parts consultation today at 338Aircon.sg.