Aircon chemical overhaul in Singapore
A chemical overhaul is the full strip-down. The unit comes off the wall, comes apart, and every component is chemically flushed rather than wiped — coil, blower wheel, casing, drainage tray. It is the deepest clean a unit can get without replacing anything.
It is worth doing about once a year, and it is what to reach for when regular servicing has stopped bringing the cooling back. If a unit is still weak a week after a general service, the fouling is bonded to the coil fins and washing will not shift it.
What happens on the visit
The unit comes off the wall
Not opened in place — removed. Everything after this happens where we can see all sides of the part we are working on.
Full dismantle
Casing, blower wheel, coil, drainage tray and fan motor all separated. This is the point at which we can tell you honestly whether a part is worn, because we are holding it.
Chemical flush
Each part is treated and flushed rather than wiped. Chemical lifts the bonded grime between the coil fins that water alone runs straight past — that is the whole reason this costs more than a service.
Drainage system cleared end to end
The full line, not just the accessible section. Overhaul is the one time the entire drain path is open, so it is the right moment to do it.
Reassembled, remounted and tested
Back together, back on the wall, and run until we can measure that it is cooling properly. You see it running before we pack up.
What’s included
- Full dismantle of the indoor unit
- Chemical flushing of coil, blower wheel and casing
- Drainage system cleared end to end
- Water tray treated and cleared
- Reassembly, remounting and cooling test
- 90-day workmanship warranty
What’s not
- Gas top-up, if the system turns out to be low
- Replacement parts, which we quote before fitting
Anything outside the job gets quoted before we do it, never added at the end.
An overhaul is the right call if
- A general service last month did not bring the cooling back
- The unit has never been overhauled and is more than a year old
- There is a persistent smell that returns within days of a clean
- Water has been dripping from the indoor unit
- Airflow is weak even with a clean filter
Commercial premises
Ceiling cassettes and VRV/VRF systems are overhauled too, but quoted per site — access and unit count drive the price more than anything else. We will look at photos and give you a figure before booking.
Common questions
- How much does a chemical overhaul cost?
- $130 for the first unit and a promotional $88 for each unit after, with no GST added. Six units works out at $570.
- How long does it take?
- Around an hour per unit, sometimes longer on a ceiling cassette. It is a slower job than a service because the unit is fully dismantled.
- Do I need an overhaul or just a service?
- If the unit still cools well and you are keeping it that way, a general service every three months is enough. Reach for an overhaul when servicing has stopped restoring performance, or once a year as a reset.
- Is a chemical overhaul the same as a chemical wash?
- No. A chemical wash cleans the unit with chemical while it stays on the wall. An overhaul removes and dismantles it completely. We do overhauls — we do not offer chemical wash.
Might not be what you need
Plenty of people land on the wrong page. If either of these sounds closer, follow it — we would rather you booked the right job than the expensive one.
- Aircon general servicing in SingaporeThe routine clean every three months that stops a unit needing an overhaul sooner than it should.
- Aircon repair in SingaporeIf a part has failed, no amount of cleaning brings it back.
Book it
Tell us how many units and roughly what’s happening and we’ll come back with a price and a slot. Same-day when we have one free. If you want to see how we have done for other people first, there are 464 Google reviews.