How Often Should You Service Your Aircon in Singapore? (2026 Guide)

Ask three different aircon companies how often you should service your unit and you'll get three different answers — usually conveniently aligned with the package they're trying to sell you. After 34 years of family-run aircon work in Singapore, here's the honest answer.

The 3-month rule (for most homes)

For a typical Singapore household running 2–4 aircon units a few hours a day, general servicing every 3 months is the sweet spot. That cadence keeps the filters from clogging, the drain pan from breeding mould, and your cooling efficiency near new-unit levels.

If you wait 6+ months between services, you're not just risking dirtier air — you'll likely need a more expensive chemical wash to undo the build-up, costing 2–3× more than the servicing you skipped.

When to service MORE often (every 2 months)

• You live near a construction site, expressway, or industrial estate (Yishun, Tuas, Jurong)
• You run aircon overnight, every night
• You have pets — their dander clogs filters faster
• You have small children with respiratory sensitivity
• One or more units are over 8 years old

When you can stretch to 4 months

• You only use aircon a few hours per week
• The unit is in a guest/storage room rarely used
• Recently installed (under 2 years old) and minimal usage

Beyond 4 months, you're gambling. Singapore's humidity (often 80%+) and the dust we get from open windows make aircon coils a perfect mould incubator. A musty smell when you switch on isn't normal — it's mould, and you breathe it.

Signs your aircon needs servicing right now (don't wait)

• Weaker cool — takes longer to bring the room down to your set temperature
• Musty smell on switch-on
• Water dripping from the unit (see our guide on aircon water dripping fixes)
• Visible black dots on the front cover or louvre
• Unusual noises — rattling, clicking, or whining
• Higher electricity bill for no obvious reason

What "servicing" actually means (so you can spot shortcuts)

A proper general service should include:

• Filter wash (front cover removal, filters washed with soap and water, dried before reinstall)
• Front cover wipe-down
• Coil + fan blower vacuum / wipe-down
• Drain pan + drain pipe check and clearing
• Cooling output test (you should feel the difference immediately)
• Visual check for refrigerant leaks, dirty coils, mould patches

If a technician finishes a single unit in under 15 minutes, ask what they actually did. A thorough service takes ~25–35 minutes per unit.