Question 1

What is the difference between general servicing, chemical wash, and chemical overhaul?

Accepted Answer

General servicing involves rinsing filters and a basic check without dismantling the unit. A chemical wash partially dismantles the fan coil to clean the evaporator coil and blower wheel with a chemical solution. A chemical overhaul is the most thorough option, involving complete dismantling of the unit for deep cleaning of every component, including the drainage tray, and is recommended for neglected units or persistent issues.

Question 2

How much does aircon servicing cost in Singapore?

Accepted Answer

As an indicative market range only, general servicing tends to fall around SGD 20–35 per fan coil unit when bundled, chemical wash around SGD 45–150 per unit, and chemical overhaul around SGD 100–350 per unit depending on unit type and accessibility. Actual aircon servicing price will vary by vendor, number of units, and unit type, so always request a written quotation.

Question 3

How often should I get a chemical wash for my aircon in Singapore?

Accepted Answer

Most households find every 6 to 12 months suitable given Singapore's humidity, though homes near construction sites, with pets, or with heavy cooking exposure may benefit from more frequent chemical washes, roughly every 4 to 6 months.

Question 4

Do I need a chemical overhaul or will a chemical wash be enough?

Accepted Answer

If your unit has a persistent musty smell after a chemical wash, visible water leakage, or has not been properly serviced in over a year, a chemical overhaul is generally the more appropriate option since it reaches the drainage tray and internal components a chemical wash does not fully address.

Question 5

Why is my aircon leaking water?

Accepted Answer

Water leakage is most commonly caused by a blocked condensate drain pipe, a dirty filter causing the coil to ice up and then drip when it melts, or a cracked or misaligned drain pan. It should be addressed promptly, as prolonged leaks can damage ceilings, walls, and in condos, the unit below.

Question 6

Does my aircon need a gas top-up every year?

Accepted Answer

Not normally. A well-sealed system should not lose refrigerant gas over time, so a recurring need for top-ups usually points to an underlying leak that should be properly diagnosed and fixed rather than repeatedly topped up.

Question 7

Is it worth signing an annual aircon servicing contract?

Accepted Answer

Contracts tend to offer better per-visit value for households with three or more units and remove the need to remember to schedule each visit, but always check what each visit includes, whether gas top-ups or parts are excluded, and the cancellation terms before signing.

Question 8

How long does a chemical overhaul take per unit?

Accepted Answer

A chemical overhaul typically takes between 1.5 to 3 hours per fan coil unit, depending on how soiled the unit is and how easily it can be dismantled, with ceiling cassette and slim-duct units generally taking longer than standard wall-mounted units.

Question 9

Can I clean my aircon filters myself between professional visits?

Accepted Answer

Yes, rinsing washable filters every 2 to 4 weeks is a simple DIY task that helps maintain airflow and reduce dust build-up on the coil, though it does not replace a professional chemical wash or overhaul, which clean components you cannot access yourself.

Question 10

Should I service my aircon after renovation?

Accepted Answer

Yes, it is strongly recommended. Renovation generates fine dust that settles deep into the evaporator coil and blower wheel even if the unit was serviced shortly before works began, so a chemical wash or overhaul before resuming regular use helps prevent lingering odours and reduced cooling performance.

Question 11

Does condo aircon servicing cost more than HDB servicing?

Accepted Answer

It can, particularly if the outdoor condenser unit is mounted in a hard-to-access location requiring safety harnessing or MCST approval for external access work. Always confirm access conditions with the vendor before booking to avoid surprise charges.

Question 12

How do I choose a reliable aircon servicing company in Singapore?

Accepted Answer

Look for clear, itemised pricing, transparency about what each service tier includes, proper equipment such as manifold gauges for refrigerant checks, a workmanship warranty period, and a willingness to explain any recommended add-ons rather than simply upselling. Comparing several vendors through a directory can help you shortlist reliable options.

Question 13

Should I buy a new aircon or overhaul an old one?

Accepted Answer

This depends on the unit's age, how frequently it has needed repairs, and its energy efficiency compared to newer models. A chemical overhaul is generally worth trying first for units under 8 to 10 years old with no major compressor issues, while older units with recurring problems may be more cost-effective to replace — you can compare installation options via our aircon installation category.

Question 14

What is the best time to book aircon servicing before it gets too hot?

Accepted Answer

Many households wait until cooling performance is already noticeably poor before booking, which usually means peak demand and longer waiting times. Scheduling servicing proactively, ideally at the start of drier or less humid stretches of the year, tends to secure more convenient appointment slots.

Aircon Servicing Singapore 2026: Chemical Wash vs Chemical Overhaul Price Guide