What Is an Aircon Chemical Wash?
An aircon chemical wash is a deep cleaning procedure that uses specialised alkaline-based solutions to dissolve stubborn dirt, mould, and grime from your aircon’s internal components. Unlike regular servicing, which focuses on surface-level cleaning, a chemical wash reaches deep into the evaporator coils, blower wheel, and drainage tray to restore your unit’s cooling performance.
At Billy Aircon, our trained technicians perform chemical washes for all major brands including Daikin, Mitsubishi, Panasonic, Midea, Samsung, and LG. Whether you live in an HDB flat, condo, or landed property in Singapore, we provide same-day chemical wash appointments with a full 90-day warranty on every service.
Over time, aircon units accumulate layers of dust, bacteria, and mould that regular servicing cannot remove. This buildup restricts airflow, reduces cooling output, and can trigger respiratory issues for your family. A professional chemical wash solves these problems at the root.
Non-Dismantle vs Full-Dismantle Chemical Wash
Billy Aircon offers two types of chemical wash to suit different levels of contamination.
Non-Dismantle Chemical Wash ($80–$120/unit)
The non-dismantle method cleans your aircon without removing it from the wall. Our technician opens the front panel, removes the filters, and applies a high-concentration alkaline solution directly onto the evaporator coils, blower wheel, and drainage tray. The solution breaks down grease, mould, and bacteria on contact. Dirty residue is flushed out through the drainage system.
This option works well for units that receive regular servicing but need a deeper clean. It takes about 30 to 45 minutes per unit and is the most popular choice among our customers.
Full-Dismantle Chemical Wash ($120–$180/unit)
For heavily soiled units, we recommend a full-dismantle chemical wash. Our technician removes the entire fan coil unit from the wall and disassembles it into individual components. Each part — evaporator coil, blower wheel, drainage tray, casing — is soaked in alkaline solution and scrubbed manually.
This method is essential when your aircon has not been serviced for over a year, produces a strong musty smell, or shows visible mould growth. The full-dismantle process takes 60 to 90 minutes per unit but delivers the most thorough results possible.
Chemical Wash Pricing Table
| Service Type | 1 Unit | 2 Units | 3 Units | 4+ Units |
|---|---|---|---|---|
| Non-Dismantle Chemical Wash | $120 | $100/unit | $90/unit | $80/unit |
| Full-Dismantle Chemical Wash | $180 | $160/unit | $150/unit | $140/unit |
All prices include GST. Multi-unit discounts apply automatically. Contact us via WhatsApp at +65 9456 0875 for a customised quote.
Our Chemical Wash Process Step by Step
Billy Aircon follows a structured 7-step chemical wash process to deliver consistent, high-quality results every time.
Step 1: Pre-Inspection Our technician inspects your aircon unit to assess its condition. We check for refrigerant leaks, drainage issues, and the overall level of contamination. This determines whether a non-dismantle or full-dismantle wash is recommended.
Step 2: Component Removal Filters, front panels, and (for full-dismantle) the entire fan coil unit are removed. Each component is laid out for individual cleaning.
Step 3: Alkaline Solution Application A professional-grade alkaline cleaning solution is applied generously to the evaporator coils and blower wheel. This solution is formulated to dissolve grease, mould, and bacterial colonies without damaging the aluminium fins.
Step 4: Deep Soak and Scrubbing Components are left to soak for 10 to 15 minutes, allowing the solution to penetrate deep into accumulated grime. For full-dismantle services, our technician manually scrubs each part with soft brushes.
Step 5: High-Pressure Rinse All components are rinsed with pressurised water to flush out dissolved contaminants. The drainage tray and piping are cleared to prevent future water leaks.
Step 6: Reassembly and Testing The unit is reassembled and mounted back on the wall. Our technician runs the aircon for 10 minutes to verify proper operation, checking airflow temperature, drainage, and any unusual sounds.
Step 7: Customer Walkthrough We show you the before-and-after condition of your aircon components and explain any issues found during the inspection. If additional repairs are needed, such as a gas top up or part replacement, we provide a transparent quote on the spot.
When Should You Get a Chemical Wash?
Regular aircon servicing keeps your unit running smoothly, but certain signs indicate that a chemical wash is overdue:
- Reduced cooling: Your aircon runs but the room does not get cold enough. This is often caused by dirty evaporator coils blocking heat exchange. See our guide on aircon not cold for more details.
- Musty or foul smell: A sour or mouldy odour when you turn on your aircon means bacteria and mould have colonised the internal surfaces.
- Water leaking: Clogged drainage caused by dirt buildup is a leading cause of aircon leaking water.
- Higher electricity bills: A dirty aircon works harder to cool the same space, consuming more power.
- Visible mould: Black or green spots visible on the blower wheel or around the air outlet.
As a general guideline, we recommend a chemical wash every 6 to 12 months for residential units in Singapore. Homes with pets, smokers, or heavy cooking should consider more frequent chemical washes.
Before and After Chemical Wash Results
The difference a chemical wash makes is dramatic. Evaporator coils caked in black grime are restored to their original silver finish. Blower wheels choked with dust and mould are cleaned until each blade is visible. Drainage trays harbouring stagnant water and slime are scrubbed clean.
Our customers regularly report that their aircon feels noticeably colder within minutes of a chemical wash. Many describe it as getting a brand-new aircon without the cost of replacement.
Billy Aircon documents the before-and-after condition for every chemical wash job. Ask your technician to show you the difference — it speaks for itself.
Why Choose Billy Aircon for Chemical Wash
Experienced Technicians: Our team has over 10 years of hands-on experience with all aircon brands and models in Singapore.
90-Day Warranty: Every chemical wash comes with a 90-day service warranty. If any issue related to our service arises within this period, we return and fix it at no extra charge.
24-Hour Response: Contact us anytime. We respond to all enquiries within 24 hours and offer same-day appointments for urgent cases.
Transparent Pricing: No hidden charges. We quote before we start, and the price you see is the price you pay.
All Property Types: HDB flats, condos, landed homes, offices — we service them all across Singapore.
Frequently Asked Questions
How long does a chemical wash take?
A non-dismantle chemical wash takes about 30 to 45 minutes per unit. A full-dismantle wash takes 60 to 90 minutes per unit due to the additional disassembly and reassembly steps.
Is chemical wash safe for my aircon?
Yes. The alkaline solutions we use are formulated specifically for aircon cleaning. They effectively dissolve contaminants without corroding aluminium fins or copper piping.
How often should I do a chemical wash?
We recommend every 6 to 12 months for residential units. Units in dusty environments, homes with pets, or kitchens near the aircon may need more frequent washes.
What is the difference between chemical wash and chemical overhaul?
A chemical wash cleans the accessible internal parts. A chemical overhaul (full-dismantle) involves completely removing the fan coil unit from the wall for more thorough cleaning. Both are offered by Billy Aircon. Read our detailed chemical overhaul vs chemical wash comparison to determine which option suits your unit.
Can chemical wash fix my aircon that is not blowing cold air?
In many cases, yes. Dirty evaporator coils are one of the most common causes of reduced cooling. If the issue persists after a chemical wash, it may indicate a gas top up is needed.
Book Your Chemical Wash Today
Do not let a dirty aircon compromise your comfort and health. Billy Aircon provides professional chemical wash services across Singapore with same-day availability and a 90-day warranty.
WhatsApp us at +65 9456 0875 to book your appointment or get a quote. View our complete aircon servicing prices for more options.
