How often should you service your aircon in Singapore? (And why you really shouldn't skip it)

Singapore aircons run harder than aircons almost anywhere else in the world. We use them daily, year-round, in humidity that loves to grow mould on coils. Most of the "my aircon broke" problems we get called for aren't actually breakdowns — they're units that haven't been serviced in 9, 12, even 18 months. So how often should you actually service yours?

The short answer

For a normal-use HDB or condo home: general servicing every 3 to 4 months.

For homes where the aircon runs daily (bedrooms in particular): push it to every 2 to 3 months. For lightly-used units in a guest room or office? Once every 6 months is fine — but no longer.

Beyond 6 months, you start hitting a wall: filters clog, coils get dusty, the drainage pan grows mould, and a regular service is no longer enough. You then need a chemical wash, which is roughly 3× the cost of a general service. Skipping cheap visits forces you into expensive ones.

What does "general servicing" actually do?

A standard service takes about 30–45 minutes per unit and covers:

• Filter removal, washing and re-installation
• Front panel and louvre cleaning
• Drainage pipe flush (this is what stops the "3am drip on the floor")
• Fan blade wipe-down
• Visual coil inspection
• Cooling output check (we measure the temperature drop)

It's preventative maintenance, not a deep clean. The goal is to catch problems early — a small water leak, a coil starting to dust up, slightly weak cooling — before they snowball.

What about chemical wash and overhaul?

These are deep cleans you only need when general servicing isn't enough.

Chemical wash

Coils and the blower wheel are sprayed with a specialised cleaning solution that dissolves dust, mould, and oily buildup. The unit stays mounted on the wall. This is the right call when you notice:

• A bad smell when the aircon starts up
• Visibly weak airflow even when set to max fan
• Mild water leaking from the front of the unit
• Black streaks appearing on the louvre

Chemical overhaul

The entire unit gets dismantled, parts soaked in chemical solution, and reassembled. This is for badly neglected units (no service in over a year, or you've just moved into a place where the previous owner never serviced it).

How to know it's time

Don't wait for the calendar. Book a service the moment you notice:

• Cooling has gotten worse. A unit at 18°C should make a small room feel cold within 5–10 minutes. If it takes longer, somethings dusty or gas is low.
• You hear a louder hum or rattle. Fan blades collect dust unevenly, which throws balance off.
• Water drips from the front. The drainage is partially blocked. Easy fix at this stage. Expensive fix if you wait.
• The bill went up. A dirty coil makes the compressor work harder. Servicing pays for itself in electricity.
• Smell. Especially after the unit's been off for a few days. Mould has set in.

Skipping the maths

A general service runs around $30 per unit (with a 2-unit minimum). That's ~$60 every 3 months, so roughly $240 per year for a 2-unit HDB.

Skipping it for 18 months and ending up needing a chemical overhaul on both units? You're looking at $300+ in repair, plus higher electricity bills along the way, plus the risk of a compressor failure (which is when you start budgeting for a new unit at $1,500+).

Cheap, regular maintenance is by far the best deal you can get on your aircon. We'd much rather you book us every 3 months than call us in a panic because water's dripping onto your laptop.

A practical schedule

Here's what most of our regular customers do:

• Quarterly: general service on all units
• Once a year (or every 18 months): chemical wash on the master bedroom unit (which runs the most)
• Every 2–3 years: chemical overhaul on heavy-use units, especially if you have pets or cook a lot of curry

Set a recurring reminder. We'll WhatsApp you when you're due — but a calendar nudge to yourself is the most reliable backup.

The takeaway

Aircons in Singapore aren't a "set and forget" appliance. They're closer to cars — regular small maintenance, or expensive sudden failure. Three to four months between general services is the sweet spot. Anything beyond six is borrowing trouble.