How often should I do an aircon chemical wash in Singapore?

Once every 6–12 months is recommended for most Singapore households, in addition to a standard service every 3 months. Singapore's humidity accelerates mould and bacteria growth inside aircon units, making regular chemical washes important for air quality and unit lifespan.

Aircon Chemical Wash Singapore | From $60/unit

Q: How much does an aircon chemical wash cost in Singapore?

AFIX charges $60 for a single unit chemical wash and $50/unit for 2 or more units. This includes chemical flush, high-pressure wash, and drainage flush.

Q: What is an aircon chemical wash?

An aircon chemical wash is a deep-cleaning process where the evaporator coil is flushed with chemical solution and all components are high-pressure washed. It goes much further than a standard service and is recommended when the aircon smells, leaks, or is not cooling effectively.

Q: How long does an aircon chemical wash take?

A chemical wash takes approximately 45–60 minutes per unit — longer than a standard 20–30 minute service as it requires a deeper clean and careful reassembly.

Q: When do I need a chemical wash instead of a normal service?

You need a chemical wash if your aircon smells musty or mouldy, is leaking water, is not cooling as well as it used to, or has not been serviced in over a year. A standard service only cleans the surface — a chemical wash removes deep-seated mould, bacteria, and buildup that routine cleaning cannot reach.

Q: Will a chemical wash fix my aircon if it's not cold?

A chemical wash restores cooling performance if the root cause is a dirty or clogged evaporator coil restricting airflow. If the issue is low refrigerant gas or a faulty compressor, those need to be addressed separately. We include a gas level and performance test with every chemical wash and will advise you clearly on findings.

Chemical Wash Pricing

Clear pricing.
No surprises.

All prices include full dismantling, chemical flush, high-pressure wash, mould treatment, drainage flush, gas test, before-and-after photos, and shoe covers.

Aircon Chemical Wash

Deep clean & restore performance

1 unit$60

2 units onwards$50 / unit

Everything in a standard service

Dismantling of indoor unit

Chemical solution flush of evaporator coil

High-pressure wash of all components

Full drainage system flush

Before & after photos sent to you

Shoe covers & floor protection used

Book chemical wash ↗

Standard wall-mounted units. Ceiling cassette & ducted units quoted separately.

Need a standard service instead? If your aircon is running fine and just needs routine upkeep, standard servicing starts from $25/unit.

What it involves

What happens during a chemical wash

A chemical wash is a full teardown and deep clean of your aircon's indoor unit. Unlike a standard service that cleans the surface, a chemical wash reaches the parts that routine maintenance can't — the evaporator coil, internal drainage channels, and blower components that accumulate mould and bacteria over time.

Our technician flushes the evaporator coil with chemical solution to break down buildup, high-pressure washes every component, and flushes the entire drainage system before reassembling.

You get before-and-after photos of every unit. The whole job takes 45–60 minutes per unit. When we're done, your aircon should cool faster, smell clean, and run quieter.

Full indoor unit dismantled
Evaporator coil chemical flush
High-pressure wash of all parts
Mould & bacteria treatment
Drainage system fully flushed
Air filter cleaned & disinfected
Blower wheel deep cleaned
Gas level & compressor test
Unit reassembled and tested
Before & after photos sent

Do you need one?

Signs you need a chemical wash

A standard service won't fix these — you need a chemical wash.

Aircon smells musty or mouldy

Mould and bacteria have built up on the coil and in the drainage system. Routine cleaning won't reach it. A chemical wash with mould treatment clears it fully.

Water leaking from the unit

A blocked or partially clogged drainage system causes water to overflow from the tray. A full drainage flush during chemical wash clears the blockage completely.

Not cooling as well as before

A heavily fouled evaporator coil reduces airflow and heat exchange. If your room takes much longer to cool down, a chemical flush often restores full cooling capacity.

Not serviced in over a year

If your aircon hasn't been properly serviced in 12+ months, mould and buildup will have accumulated beyond what a standard service can address. Start with a chemical wash to reset it.

Which service do you need?

Chemical wash vs standard servicing

Not sure which one applies to you? Here's the difference.

What it covers	Standard Servicing	Chemical Wash
Filter cleaning	Yes	Yes
Evaporator coil clean	Surface clean	Full chemical flush
Drainage cleared	Yes	Yes — full system flush
Time per unit	20–30 mins	45–60 mins
Price	From $25/unit	From $60/unit
Best for	Routine maintenance	Smell, leaking, weak cooling

View standard servicing →

Recommended frequency

How often should you do a chemical wash?

In Singapore's climate, a chemical wash every 6–12 months is recommended for most households — in addition to a standard service every 3 months. The heat and humidity accelerate mould, bacteria, and mineral buildup inside your aircon, especially on the evaporator coil and in the drainage channels.

If you run your aircon more than 8 hours a day, have pets, or notice any smell or reduced cooling, lean toward every 6 months. For lightly used units in air-conditioned offices or bedrooms, once a year is usually sufficient.

After the first chemical wash, maintaining with regular standard services every 3 months will slow down future buildup — meaning your next chemical wash won't need to be as intensive.

Light use

Once a year

Under 8 hours/day, no pets

Heavy use or any symptoms

Every 6 months

8+ hours/day, pets, or smell/leak

Common questions

Chemical wash FAQ

Still unsure? Drop us a message and we'll advise you honestly.

Ask us on WhatsApp →

How much does an aircon chemical wash cost in Singapore?+

AFIX charges $60 for a single unit and $50/unit for 2 or more units. This includes chemical flush, high-pressure wash, drainage flush, before-and-after photos, and shoe covers. No hidden charges.

What is an aircon chemical wash?+

A chemical wash is a deep-cleaning process where the evaporator coil is flushed with chemical solution and all components are high-pressure washed. It reaches areas that standard servicing cannot, and is recommended when the aircon smells, leaks, or isn't cooling effectively.

How long does a chemical wash take?+

Approximately 45–60 minutes per unit — longer than a standard 20–30 minute service as it requires a deeper clean and careful reassembly.

When do I need a chemical wash instead of a normal service?+

Choose a chemical wash if your aircon smells musty or mouldy, is leaking water, is not cooling as well as before, or hasn't been properly serviced in over a year. A standard service only cleans the surface — a chemical wash removes deep-seated mould, bacteria, and buildup that routine cleaning cannot reach.

How often should I do a chemical wash in Singapore?+

Every 6–12 months, in addition to a standard service every 3 months. Singapore's humidity accelerates mould growth inside aircon units. Heavy users (8+ hours/day or pets) should do it every 6 months; lighter users can go once a year.

Will a chemical wash fix my aircon if it's not cold?+

A chemical wash restores cooling if the cause is a dirty evaporator coil blocking airflow. If the issue is low refrigerant gas or a faulty compressor, those need to be addressed separately. We include a gas level and performance test with every chemical wash and will advise you clearly on any findings — no obligation to proceed with additional work.

Aircon Chemical WashSingapore

Clear pricing.No surprises.