What's Included in a Non-Dismantle Chemical Wash

We operate as the dedicated chemical wash division of Billy Aircon, and our 26-person team often sees Singapore homeowners caught off guard by a sudden drop in cooling performance.

That stale odour usually means “aircon slime” has started forming on the internal coils, a frequent issue given our constant 80% humidity.

For anyone asking what is non dismantle aircon chemical wash, here is exactly how this targeted service restores your unit’s efficiency without the cost of a full teardown.

Line-by-Line Non Dismantle Aircon Service Scope

A Non-Dismantle Chemical Wash is a comprehensive in-place cleaning service priced at a flat S$80 per unit for HDBs and condos. We structure this fixed-price package to completely clean the system while it remains on the wall. Your technician will perform the following complete scope of work during the visit:

1. Pre-wash inspection to record a baseline performance reading.
2. Chemical flush of the evaporator coil using a hospital-grade, non-corrosive alkaline detergent.
3. Drainage pan and condensate pipe flush to dissolve stubborn “aircon jelly” and clear sludge.
4. Blower fan clean performed directly in situ without removing the rotor.
5. Filter wash (removed, scrubbed with soap, and refitted).
6. Anti-bacterial finishing spray applied to all internal surfaces to prevent mould.
7. Post-wash performance reading measured in meters per second (m/s) with a digital anemometer.
8. Ground sheet cleanup and immediate area check to protect your flooring.
9. Digital receipt sent instantly to your phone for easy record-keeping.
10. 90-day workmanship warranty card for your peace of mind.

Our team ensures the fixed price covers this entire process without any surprise add-ons. Current 2026 market rates in Singapore often range from S$85 to S$100 for similar single-unit chemical services, making this a highly competitive choice for routine maintenance.

What Each Step Actually Does

Every step of this wash is designed to strip away biological buildup and restore optimal airflow velocity. We target the evaporator coil, drainage system, and blower fan using specialized solutions that destroy odour-causing bacteria.

• Coil flush: The chemical flush applies an alkaline detergent directly to the evaporator coil while it remains mounted in the fan coil unit. This specific hospital-grade chemical breaks down biofilm, which is the sticky bacterial and fungal layer that grows on the fins over months of use. We allow a contact time of 5 to 10 minutes before rinsing it thoroughly through the drain path. Singapore’s climate creates the perfect breeding ground for Bacillus bacteria within these coils, making this breakdown essential.
• Drainage pan and pipe flush: Our technicians pour a dedicated chemical solution directly through the drain pan to dissolve accumulated sludge. This sticky buildup, commonly known as “aircon slime” or “aircon jelly,” is the primary cause of indoor unit leaks. The chemical process ensures the condensate pipe is flowing freely by verifying water emerges at the outdoor drain.
• Blower fan clean: We access the fan wheel via the cover opening and surface-clean it with an anti-bacterial solution. Full blower removal is not part of the non-dismantle scope, as that requires a complete overhaul service.
• Filter wash: Filters are pulled from the unit, heavily scrubbed with a soap solution, rinsed, and securely refitted. Our crew rarely needs to replace filters because most wash clean perfectly. A replacement usually costs S$15 to S$30 if the mesh is physically torn.
• Anti-bacterial spray: The final spray is applied to all cleaned internal surfaces to inhibit future growth. This hospital-grade formulation actively kills 99.9% of surface bacteria and mould spores on contact. We ensure the unit dries fully within 30 minutes, leaving your room with fresh, healthy air.

What’s NOT Included in Non-Dismantle

A non-dismantle wash does not involve taking the fan coil unit off the wall or performing a deep chemical bath soak of the individual parts. Those intensive procedures belong to the Full-Dismantle Overhaul tier. We want to be completely transparent about what falls outside this basic package.

• Fan coil unit removal: Required only in a Full-Dismantle Overhaul.
• Chemical bath soak: Component soaking is exclusive to full overhauls.
• Drain pan physical scrub: This tier relies on a chemical flush, while sludge is physically scrubbed only during a dismantle.
• Insulation inspection: Checking the internal insulation for degradation is a dismantle-only procedure.
• Gas top-up: This is a separate add-on, executed only if a pressure check confirms it is strictly necessary.
• Full outdoor condenser chemical clean: Thorough cleaning of the external compressor is a separate service, often needed in industrial zones.
• Filter replacement: This is quoted separately at S$15 to S$30 if required.

If the pre-wash inspection reveals severe drain blockage or heavy visible biofilm, our technician will explain the situation immediately. We quote the upgrade to a Full-Dismantle Overhaul up-front, which typically costs between S$130 and S$180 in the 2026 market. You must sign off on the tier change before work continues, guaranteeing zero hidden fees.

Duration

A single non-dismantle unit takes between 30 and 45 minutes to complete. We pair our technicians for larger jobs, allowing three units to be finished in just 90 to 120 minutes. These timeframes measure the actual cleaning phase and do not include the initial setup.

Our standard protocol adds about 15 to 20 minutes for laying down waterproof ground sheets and preparing the equipment. This careful preparation prevents any dirty water or chemical splatters from damaging your flooring. By comparison, a full dismantle service would easily take over two hours for a single unit.

Pricing Recap

The baseline cost for a non-dismantle chemical wash is S$80 for a single HDB or condo unit. We offer bundled rates that bring the per-unit cost down when servicing multiple air conditioners in one visit.

Landed properties, CBD offices, and jobs starting after 6 PM carry an additional charge that is always quoted up-front. We require an on-site assessment to accurately price commercial cassette and ducted units. Many homeowners choose to lock in these competitive rates through a regular maintenance schedule.

When to Choose Non-Dismantle vs Overhaul

A non-dismantle wash is perfect for units experiencing a mild smell or a slight drop in cooling performance without heavy blockage. We recommend this service if your aircon has been on a regular 3 to 4-month maintenance schedule. This lighter chemical flush is also ideal if it has been less than six months since your last deep clean.

• Unit remains on a regular 3 to 4-month servicing schedule.
• You notice only a mild stale smell or a light cooling drop.
• There is no visible mould growing on the external louvres.
• The drainage pipe shows no signs of severe blockage or leaking water.
• It has been less than six months since the last chemical wash.

Full-Dismantle Overhaul is the right tier when your system’s symptoms progress past this specific threshold. We strongly suggest reading our detailed breakdown on Chemical Wash vs Chemical Overhaul for the full decision framework.

Identifying the correct service tier immediately saves you time and ensures your unit operates at peak efficiency. Now that you understand what is non dismantle aircon chemical wash, reach out to our team today to schedule your pre-wash inspection and secure your fixed-price service slot.