Aircon Chemical Wash in Singapore

Prices checked October 2026 against the published price lists of 526 contractors listed on Homees, MOM's 2025 wage data and Qanvast's 2026 report. How we price →

Key takeaways

• Chemical wash runs S$80–S$150/unit; a full chemical overhaul S$150–S$250/unit.
• Ask whether the fan coil is dismounted for the wash — done in-place, it's often just a heavy rinse.
• A chemical wash is the fix when general servicing stops restoring cooling.
• Botched chemical washes damage coils — technician experience with your brand matters.

When general servicing stops fixing the cooling, a chemical wash is the next step — and the company you pick decides whether your unit comes back better or worse. Here's what the job involves, what it costs, and the questions that separate professionals from rinse-and-run operators. See the difference explained in chemical wash vs overhaul.

Most aircon servicing companies here also provide in-depth aircon chemical wash and chemical overhaul services. Professionals typically have the expertise to do this higher-level aircon servicing, ensuring your system runs smoothly.

You can find the best-reviewed chemical wash and chemical overhaul companies here on Homees on this page.

Before engaging an aircon service, it is crucial to read through HDB's guidelines on aircon installation and servicing. You can find out more about the guidelines here.

Aircon Servicing Cost Calculator

Use this aircon servicing cost calculator to estimate your bill.

Types of Chemical Wash and Overhaul

Like many terms, we all use words loosely. Unless you are an expert in this field, most of us use the following terms interchangeably. The typical terms for aircon chemical washing include:

1. aircon chemical cleaning
2. aircon chemical flushing
3. aircon chemical wash

An aircon chemical overhaul service usually refers to an even more thorough and in-depth cleaning of the aircon system. For more clarification, feel free to ask the aircon companies themselves for what they provide in these services.

Aircon Chemical Wash and Overhaul Price

Aircon Chemical Wash Price

Type of cleaning	Rates
Non-Dismantle Chemical Wash Per Unit	$80-$100 SGD
Dismantle Chemical Wash Per Unit	$130-$180 SGD

Aircon Chemical Overhaul Price

Unit(s)	Price
1 Fancoil	$120 – $180
2 Fancoils	$250 – $320
3 Fancoils	$350 – $430
4 Fancoils	$430 – $530
5 Fancoils	$500 – $600
6 or more	$90 – $120 per fancoil

Aircon Chemical Cleaning vs Aircon Chemical Overhaul

Most people are not able to differentiate aircon chemical cleaning/washing from a chemical overhaul.

Simply put, general aircon servicing a cleaning of the front panel, replacing the filter which usually gets clogged with dirt, dust, and other debris. However, dust and dirt will accumulate inside the device over time. Sometimes, regular service cannot get rid of the dirt and other unwanted debris.

When that happens, it becomes necessary to use a more thorough and intense cleanup, or what we know as chemical cleaning/wash.

Aircon chemical cleaning (or washing)comprises more than just general servicing. Chemical washing is performed using the hanging tray technique, in which only the front cover and filter are removed, and a tray is hung below the fan-coil and chemical washing is performed at the unit itself. The cleanup will get rid of stubborn stains, grease, and accumulated dust. The evaporator is also removed and the chemical replaced inside the unit.

Though more thorough than general servicing, this method may not be comprehensive enough compared to a chemical overhaul. For example, it may not be possible to reach the water tray behind to remove the dirt and jelly. The dust will accumulate over time and cause leaking.

Aircon chemical overhaul, on the other hand, involves dismantling the whole unit and thoroughly clean every part using chemical wash. As you can see, its cleaning effect is extensive and will remove all the slime and grime from the water tray.

This service will be provided after aircon chemical cleaning, or when chemical cleaning will not be sufficient.

Since the services provided requires more dedicated time and effort, its price is higher than chemical wash, usually by more than 100SGD. We will cover the price range below.

A thorough, well-executed chemical servicing and chemical overhaul offer some benefits. Benefits include lower electricity bills, higher efficiency, smoother running, cleaner (and thus healthier) air.

Why does the aircon need chemical cleaning/chemical washing?

An overhaul is required when an air conditioner is severely clogged or choked, and general service is unable to improve the situation. Chemical-based cleaning is a more thorough method of air conditioner maintenance. It is advisable for those units which are badly clogged. The air conditioner is dismantled part by part and chemically cleaned during an overhaul.

In a chemical overhaul, the aircon is dismantled part by part and chemically wash. It is best recommended for you to engage a professional who does aircon chemical wash in Singapore, compare quotations and select one that is the best for you.

What does chemical flushing and overhaul include?

Aircon chemical overhaul includes:

1. Lubricating the bearing of the fan will eliminate any sound produced when the unit operates
2. Performing thorough checks to the thermostats and the unit’s controller
3. Chemical solutions are used to clean the pipes, blower wheel, and drain pans.
4. Cleaning of the fan evaporator coil to ensure a smooth heat exchange without the accumulation of dust and grime.
5. Replacement of faulty bearings to eliminate any sound produced during operation

Can I do my chemical flushing myself?

It is not advisable to do chemical flushing yourself - if not done correctly, many other problems may occur.

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How to choose well

1. The key requirement. Technicians should be experienced with your brand and unit age — a botched chemical wash damages coils.
2. Ask whether the fan coil is dismounted for the wash — a 'chemical wash' done in-place is often just a heavy rinse.
3. Reviews with specifics beat star counts. Look for reviews that mention your job type and how problems were handled — not just "good service".
4. Itemised quotes only. A lump-sum quote is where surprises hide. Line items let you compare fairly across companies.
5. Never pay fully upfront. Deposit, progressive payments, and a retention until the work is done and checked.

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What it should cost

Chemical wash runs S$80–S$150/unit; a full chemical overhaul S$150–S$250/unit. For the full pricing breakdown, see our cost guide.

Prices move with scope, materials and access — treat any quote wildly below market as a red flag, not a bargain.

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FAQ

How much do aircon chemical wash companies charge in Singapore? Chemical wash runs S$80–S$150/unit; a full chemical overhaul S$150–S$250/unit. Always compare 2–3 itemised quotes.

How do I choose a good company? Check real Google reviews and completed local projects, note the key requirement (Technicians should be experienced with your brand and unit age), and get an itemised quote before committing.

Is this list up to date? The shortlist is from our 2023 editorial round and is being re-verified for 2026. For the current vetted list with live contact details, use the Homees contractor directory.

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Shortlist from Homees' 2023 editorial round, under re-verification for 2026. For the live, vetted directory with contact details, visit Homees contractors.