An aircon chemical overhaul Singapore homeowners trust when nothing else works — your fan coil is fully removed from the wall, every component is dismantled, chemical-washed and pressure-jet rinsed individually. $100–$150 per unit with a free gas top-up if needed.
Where Overhaul Sits
Most homes only ever need general servicing. Step up to chemical wash or chemical overhaul only when the level below it can't fix the problem.
Routine quarterly clean. Dismantle covers and blower, jet-wash the parts, reassemble. Done in place on the wall.
View general servicing →General service plus chemical applied to the fan coil. Done in place on the wall. For mould, smell or weak cooling.
View chemical wash →Fan coil fully removed from the wall. Every component dismantled, chemical-washed and pressure-jet rinsed. Includes free gas top-up.
You are viewing thisWhen You Actually Need It
If you've already done a chemical wash and the problem came back, or your unit is in any of these states, an overhaul is the right move.
If the drainage is still backing up after a chemical wash, the bio-jelly is hardened deep inside. Only full disassembly clears it.
Mould trapped in the rear of the heat exchanger and casing seams can't be reached without removing the whole unit. Overhaul is the only fix.
If gas levels are fine but cooling is still poor, the coil is so clogged that airflow is choked off. Overhaul restores it.
Old units that have never had an overhaul accumulate years of compacted grime. A single overhaul can extend life by several years.
If the smell returns within weeks of a chemical wash, the source is inside parts that can only be cleaned by removing them.
Before spending $1,500+ on a new install, an overhaul on a 7–10 year unit can restore performance to near-new for a tenth of the cost.
Chemical Wash vs Chemical Overhaul
Both use chemicals on the fan coil. The difference is what comes off the wall.
| Chemical Wash | Chemical Overhaul | |
|---|---|---|
| Includes general servicing | ✓ | ✓ |
| Chemical applied to coil | ✓ | ✓ |
| Pressure-jet wash | ✓ | ✓ |
| Drainage flush | ✓ | ✓ |
| Fan coil removed from wall | ✗ | ✓ |
| Every component dismantled | ✗ | ✓ |
| Hidden mould & jelly removed | ✗ | ✓ |
| Free gas top-up if needed | ✗ | ✓ |
| Time required (per unit) | 40–60 min | 90–120 min |
| Price per unit | $80 | $100–$150 |
The Lion City Process
The steps unique to overhaul are highlighted — these are what separate it from a chemical wash.
Floor sheets and furniture protection go down first. We treat your home like our own.
Power on, check airflow, listen for noises and document any pre-existing issues — so we know exactly what we're dealing with.
Refrigerant pumped down to the outdoor compressor, electrical isolated. Done correctly so no gas is wasted.
Front cover, swing flap and filter housing carefully removed.
The complete fan coil unit comes off the bracket and out of the room. This is what makes it an overhaul.
The drainage tray and fan roller (blower wheel) are separated from the main unit.
All parts taken to a designated wash location — usually a balcony or service yard — where we can work cleanly.
Coil, blower, water tray and casing all get aircon-grade chemical solution. Years of compacted grime starts breaking down.
Every dismantled component goes under high-pressure jet individually. Hidden mould, jelly and bacteria flushed out.
Multiple rinse cycles to ensure no chemical residue stays on any component.
No reassembly until everything is fully dry — wet reassembly causes electrical issues and corrosion.
Drainage line vacuumed clear. Often releases years of accumulated sludge that's been causing leaks.
Unit goes back on the bracket, all mounting points secured properly. We re-align the bracket if it was off originally.
Refrigerant lines reconnected, valves opened, electrical reconnected and safety-checked.
If your refrigerant is low after reinstallation, we top it up at no extra cost. This is built into the $150 price.
Unit run, airflow checked, cooling confirmed cold — before we leave. You'll see the difference immediately.
Transparent Pricing
Wall-mounted fan coils only. The free gas top-up alone is worth $80 — built into every overhaul.
| 1 fan coil unit | $150 |
| 2 fan coil units | $280 |
| 3 fan coil units | $390 |
| 4 fan coil units | $480 |
| 5+ units (per unit) | $100 |
Prices exclude 9% GST · Wall-mounted fan coils only
Note: 24,000 BTU single-split units = +$30 per unit
Island-Wide Coverage
HDB flats, condos, landed properties and small commercial. We can dismount and reinstall fan coils anywhere on the island.
Real Customers · Real Reviews
Verified Google reviews from chemical overhaul customers.
"Sarwer and team did a good job in servicing and chemical overhaul for our residence. Good explanation in showing us our condensation problem in our trunking."
"The only Air Con service provider I've come across that did a proper chemical overhaul unlike others. You trained your men well, did not give excuses and showed me the pipe flaws from my previous contractor."
"My aircon techs told me chemical cleaning cannot be done due to installation fault. Lion City's technician inspected and said chemical overhaul can be done. Now my aircon is finally cleaned up properly!"
"Liton, Kamrul and Asad did chemical overhaul for my 10 year old aircon (also leaking) and now everything works perfectly. Great service."
"Aircon chemical wash and service done excellently by Lion City. Most recommended technicians Liton and Kamrul. Thanks guys."
"Hands down one of the best aircon companies I've engaged. Smooth process and very trustworthy. Replaced units and the compressor with Lion City."
Common Questions
Quick answers to what most Singapore homeowners ask before booking.
WhatsApp us for the fastest reply, call directly, or fill in the quick form below — same-day appointments available across Singapore.