How much does aircon servicing cost in Singapore?

For a typical HDB home with 2–3 aircon units, you're looking at roughly $90–$150 to service everything in one visit. A single one-off unit is closer to $90–$130. Chemical wash is more. Gas top-up is more again. And most one-off repairs land somewhere in $120–$250.

These are SparkFlow's guide ranges as reviewed on 31 July 2026, not regulated prices or a substitute for a written site-specific quote. The rest of this is for anyone who wants to understand why the prices vary so much, what the common upsells sound like, and how to tell when a $25 flyer is a deal versus a trap.

Why prices vary so much in Singapore

Aircon servicing in Singapore is one of the most quoted home services and one of the most inconsistently priced. Part of that is genuine — there really is a difference between cleaning a filter and dismantling a unit for a chemical wash. Part of it is less useful to customers: a low headline price may omit the minimum unit count, transport, drainage work or other items that appear only after the visit starts.

Most reputable companies in Singapore quote within a fairly tight range. If you're seeing something dramatically cheaper, ask what's included before saying yes.

General servicing

This is the routine maintenance most households need every 3–4 months. The work involves taking the front panel off, washing the filter, hosing the indoor coil, flushing the drain pan, and checking the outdoor unit. It takes 30–45 minutes per unit when done properly.

Pricing depends almost entirely on how many units you're doing in one visit. Two or more units in the same trip, the price drops to $30–$50 per unit. A single one-off unit costs $90–$130 because the tech still has to come out, set up, and leave for just one. The more units you bundle, the better the per-unit rate.

Most of our regulars are on a 3-monthly aircon servicing schedule with us doing their whole house each visit. At the $30–$50 per-unit guide range, quarterly servicing for three units works out to about $360–$600 a year. Actual frequency should still follow usage and condition.

Chemical wash

A chemical wash is what you need when general servicing isn't restoring cooling anymore. The coil fins inside the indoor unit have a layer of biofilm — mould, dust, and oily residue that's hardened into a thin paste — and no surface wipe is going to get it out. During an in-place chemical wash, the unit remains mounted while the coil, blower and drainage components are protected and cleaned with a suitable solution. If the indoor unit must be dismantled and its parts cleaned separately, that is a chemical overhaul rather than a wash.

For a single wall-mount unit, that's $150–$220. For multiple units in the same visit:

• 2 units: $280–$380
• 3 units: $400–$540
• 4 or more (whole-home): by quote, usually around $130 per unit at scale

Cassette and ceiling-suspended units cost an extra $30–$50 each because they're harder to dismantle. If you're unlucky and have one of those, you'll already know.

There is no responsible fixed interval for chemical cleaning. As our aircon servicing schedule explains, it should follow inspection. Persistent musty odour, restricted airflow or weak cooling after routine service can justify a deeper clean, but can also point to another fault that needs diagnosis.

Chemical overhaul

Chemical overhaul is the next level up, usually only needed when a unit has been badly neglected. The whole indoor unit comes off the wall — fan motor, blower wheel, coil and casing — and its parts are cleaned separately. The outdoor unit is inspected and cleaned only as its condition and manufacturer guidance require; it is not automatically dismantled as part of an indoor overhaul.

Pricing is $250–$450 per unit. Most people only need this once, after which a 3–4 month general schedule keeps things out of trouble for years.

Common customers for overhaul: people who've just moved into a place where the previous owner clearly never serviced anything, and households where the units have been running for 2+ years without proper maintenance. If you have pets or do a lot of frying at home, overhaul gets you back to baseline faster.

Gas top-up

Weak cooling, ice on the evaporator or unusually long run times can be consistent with low refrigerant, but they are not proof of it. There are a few important things to know about an aircon gas top-up in Singapore.

The price depends on which refrigerant your unit uses:

If you're not sure which one your unit uses, the model sticker on the outdoor unit will tell you. Or send us a photo and we'll tell you.

One thing we feel strongly about: a proper gas top-up always includes a leak test first. Refrigerant doesn't evaporate the way petrol does — it's a sealed system. If your gas is low, there's a leak somewhere, and topping up without finding it means you'll be back here in 3 months paying for another top-up. We test pressures before we top up, every time.

If a leak is found, repair cost depends on where it is. The location, access and refrigerant quantity. Ask for the leak location, proposed repair and recharge scope in writing before approving work. The NEA's refrigerant guidance also explains the training arrangements for household R32 systems.

Common repair pricing

These are common fault examples and the guide ranges used in this article. A proper diagnosis can land outside the bracket.

Aircon dripping water indoors is commonly caused by a clogged drain line, one of the main causes of a leaking aircon and is $80–$130 to flush. Sometimes it's a frozen coil from restricted airflow ($90–$150), and occasionally a cracked drain pan ($100–$160). We'll diagnose before quoting.

Outdoor unit running but indoor blowing room-temperature air is one of the more common reasons an aircon stops blowing cold, and is usually a failed capacitor on the outdoor unit, which is $120–$180 to replace. Less commonly, it's the compressor itself, in which case the unit usually needs to be replaced rather than repaired.

Aircon won't turn on at all — first thing we check is the MCB at your DB box. Sometimes it's tripped and you don't even know — and there are several reasons an HDB circuit trips that have nothing to do with the aircon itself. If that's the only issue, the call is just our diagnostic fee. After that, we check remote batteries (which catches more people than you'd think), then the control board. Total cost usually $80–$180.

Control board fault — the brain of the indoor unit. If it can't read the room temperature, it won't signal the compressor to start. Diagnosis plus replacement is $150–$300 depending on the exact board, availability and brand.

On-site diagnostic is $80 when you don't know what's wrong, and we waive it if you proceed with the recommended repair. We don't guess and we'll never push a fix we can't explain.

Things that change the final price

A few situational things can push pricing up:

• After-hours visits, Sunday, or public holidays usually carry a 20–30% premium
• Same-day emergency callouts add a small premium to the diagnostic fee
• Outdoor units on high ledges or hard-to-access balconies add labour time
• Specialty brand parts (Daikin, Mitsubishi-Heavy, premium European units) sometimes need to be ordered

None of these should be a surprise on the invoice. If we know upfront that any of them apply, we tell you on WhatsApp before coming out.

The $25 flyer question

A $25 headline is not automatically a scam, but it deserves a scope check. Ask whether it requires a minimum number of units, and whether transport, drainage flushing, GST or consumables are excluded.

The risk is an open-ended visit where gas top-up, chemical wash or an overhaul is proposed before the technician shows you the diagnostic reason. Require approval before any add-on and be willing to pause the job if the explanation is unclear.

Compare the final written scope, not just the first number. A higher quote is not automatically better either; clarity about what is included is the useful test.

Training and compliance: three different checks

Do not treat "ME05" as a refrigerant licence: ME05 is a BCA contractor workhead for electrical engineering, not an EMA worker licence and not a household refrigerant-handling credential. Different parts of an aircon job have different requirements.

For HDB installations, HDB says exterior air-conditioning units must be installed by a BCA-trained aircon installer and completion may need to be reported. New or modified electrical wiring must be handled by an EMA Licensed Electrical Worker. For R32 household systems, the NEA explains the ITE training arrangement that manufacturers use to meet SCDF requirements. Ask which person is responsible for each part of the job.

How we quote

WhatsApp us a photo of the indoor unit, the brand and model, and a sentence describing the problem. We'll give you a written guide price and scope before sending anyone out. On-site, we confirm before starting. If we find something unexpected — and sometimes we do — we stop and check with you before adding to the job.

Same-day service is usually available for fault-fix jobs. Island-wide.

To summarise

Our Singapore guide ranges, reviewed on 31 July 2026, are:

• General servicing: $30–$50 per unit when bundled, $90–$130 single one-off
• Chemical wash: $150–$220 per unit, less per unit when bundled
• Chemical overhaul: $250–$450 per unit
• Gas top-up: $120–$240 depending on refrigerant type
• Common repairs: $80–$300 depending on the fault

If a quote sits outside those ranges in either direction, it's worth asking why before saying yes.