How often should you service your aircon?

How often to service an aircon in Singapore depends on how much you use it, how dusty your home is and what the manufacturer recommends. Many households book general servicing a few times a year and a chemical wash less often, but there is no single schedule that suits every home. Start with your unit's manual and adjust based on what the technician finds.

Why servicing frequency varies

Aircon in Singapore often runs for long hours in a humid climate. Dust, skin flakes and moisture build up on the filters, coil and fan, and the drain can clog. How fast this happens depends on several things, which is why a fixed rule rarely fits.

• How many hours a day the unit runs, and whether it runs overnight.
• Dust from nearby roads, construction or open windows.
• Cooking fumes reaching units near the kitchen.
• Pets, which add hair and dander.
• How often you wash the filters between visits.

A bedroom unit used every night needs more attention than a guest room unit used a few times a month. Ask your technician to note the condition of each unit and suggest an interval, rather than booking the same schedule for every room.

Start with the manufacturer's guidance

The user manual for your model is the first place to look. Manufacturers explain how to clean the filters, how often to do it and when to call a technician. Some publish maintenance advice online; for example, Daikin's FAQ page answers common care questions. Following the manual also matters for warranty claims, so keep servicing invoices.

Typical servicing types and what they cover

Different services clean the unit to different depths. A sensible plan mixes routine servicing with deeper cleans when needed, rather than booking the most expensive service every time.

The servicing price guide explains general servicing, the chemical wash page lists published wash rates, the chemical overhaul guide covers dismantled cleaning, and the condenser cleaning guide covers the outdoor unit.

Signs your aircon needs servicing sooner

Do not wait for a fixed date if the unit shows problems. Book a visit when you notice any of these:

• Weaker airflow or rooms taking longer to cool.
• A musty or unpleasant smell when the unit starts.
• Water dripping from the indoor unit.
• Visible dust or black spots on the louvres or fan.
• New noises, or higher electricity bills without a change in use.

Some of these, such as dripping or poor cooling, can also be faults rather than dirt. The aircon leaking water guide and the aircon repair guide explain how to tell the difference.

Servicing contracts and packages

Many companies sell servicing contracts that cover a set number of visits a year, sometimes with a discount or extras. A contract can make sense if you want regular visits without rebooking, but compare it with paying per visit for the schedule you actually need.

• How many visits are included, and how are they scheduled?
• Which service is included at each visit?
• Are chemical washes, gas top-ups or repairs included or discounted?
• What happens if you move house or want to cancel?
• Is GST included?

Do not sign up for more visits than your units need. A contract designed for heavy use may not be good value for units that run only a few hours a week.

Building a simple servicing plan

Write down each indoor unit, the room it serves and roughly how many hours a day it runs. Group the heavily used units, such as bedrooms used every night, and the lightly used ones, such as a study or guest room. Book routine servicing for the whole home together if that is easier, but ask the technician to note which units were dirtiest.

After two or three visits, you will have a record of how quickly each unit gets dirty. Use it to adjust the interval, and to decide when a chemical wash is genuinely needed rather than booking one by habit. Keep invoices and the technician's notes in one place, together with the model numbers, so the next company can see the history.

Keeping units clean between visits

Washing the filters regularly is the simplest way to keep an aircon working well. Follow the manual for how to remove, wash and dry them, and switch off the unit first. Keep the area around the indoor unit free of dust, and avoid running the aircon with windows open.

Make sure the outdoor unit has clear space around it, and do not store items against it. If you notice water dripping or a smell, book a check rather than waiting for the next scheduled service.

Aircon servicing frequency questions

How often should I service my aircon in Singapore?

There is no single answer. It depends on usage, dust and the manufacturer's guidance. Many households book general servicing a few times a year for heavily used units. Ask your technician to suggest an interval after seeing the condition of each unit.

How often do I need a chemical wash?

Less often than general servicing for most homes. A chemical wash is usually booked when dirt, smell or weak airflow returns despite routine servicing. Ask the technician to show you the coil and fan before agreeing to one.

Is it bad to service an aircon too often?

Servicing a clean unit too often mainly costs money, and deep cleans such as overhauls involve dismantling, which carries some risk. Match the schedule to the unit's actual condition.

Do I need servicing to keep the warranty?

It depends on the manufacturer's terms. Check the warranty card and manual, follow the recommended maintenance and keep your servicing invoices in case you need to make a claim.