An aircon chemical overhaul is the deepest cleaning service available. The indoor fan coil unit is fully dismantled — fan blower, drain tray, casing, electrical components — and each part is cleaned individually with specialised chemicals. This catches issues that even a chemical wash cannot reach: PCB corrosion, fan blade grime, hidden mould inside the casing, and accumulated debris in cavities.
Aircon Chemical Overhaul
| Number of Units | Price (no GST) | Per Unit |
|---|---|---|
| 1 unit | $200 | $200.00 / unit |
| 2 units | $370 | $185.00 / unit |
| 3 units | $515 | $171.67 / unit |
| 4 units | $640 | $160.00 / unit |
| 5+ units | $150 per unit | |
What's included
- 9-point pre-check (included with service booking, $45 min for 1 unit)
- Full disassembly of indoor fan coil unit
- Individual chemical cleaning of every component
- Coil deep treatment with anti-bacterial solution
- Fan blower wheel cleaned and balanced
- PCB inspection and dust removal
- Anti-rust coating on metal components
- Drain tray and pipe pressure-cleaned
- Full reassembly and 5-point performance test
✅ Good for
- Aircon over 5 years old without prior overhaul
- Units with persistent issues despite chemical wash
- Heavy mould infestation or strong odour
- Units showing reduced cooling after chemical wash
- Pre-rental property aircon refresh
Recent chemical overhaul jobs
Frequently asked questions
Chemical wash vs chemical overhaul — which do I need?
Chemical wash cleans the coil without disassembly — good for routine deep cleaning every 6–12 months. Chemical overhaul fully dismantles the unit and cleans every component individually — recommended every 2–3 years, or sooner if your unit has serious fouling, persistent odour, or hasn't been overhauled in years.
How much does a full HDB aircon overhaul cost?
For a typical 3-bedroom HDB flat with 3 fan coil units, a full chemical overhaul costs $515 at aircons.sg (no GST charged). 4-bedroom flats with 4 units cost $640. Pricing covers complete disassembly, individual component cleaning, and 90-day warranty.
Will chemical overhaul make my aircon work like new?
For units under 8 years old in good mechanical condition, yes — overhaul can restore most of the original cooling performance. Older units or those with worn compressors will improve significantly but may not fully recover original specs.