If your aircon isn’t cooling as well as it used to, is leaking, or giving off a musty smell, a basic cleaning won’t suffice. You may need a chemical overhaul, especially if the problem lies deep inside the unit.

This guide covers everything you need to know about aircon chemical overhaul in Singapore, including when to do it, how it compares to a chemical wash, and the associated costs, as provided by City Cooling SG.

What Is an Aircon Chemical Overhaul?

Chemical Overhaul Process by City Cooling SG

An aircon chemical overhaul is a deep cleaning service where the indoor unit is fully dismantled. Components such as the fan coil, blower, and drain pan are removed, soaked, and scrubbed using chemical solutions to remove grime, mould, and bacteria buildup. This process restores the aircon’s efficiency and improves the air quality in your space.

By comparison, a chemical wash does not involve dismantling. It only cleans the surface areas of the coil and may not effectively reach deep-seated dirt or thoroughly address internal issues.

Comparison: Basic Cleaning vs. Chemical Wash vs. Chemical Overhaul

Here’s a breakdown of what each service includes:

Service TypeBasic CleaningChemical WashChemical Overhaul
Filter cleaning
Coil cleaning(without dismantling)(fully dismantled and soaked)
Mold & bacteria removal(surface only)(thorough elimination)
Fan blower cleaning(fully removed and cleaned)
Drain pipe flushing(or minimal)(deep flushing)
Disassembly(partial, if any)(complete disassembly)
Suitable forLight maintenanceModerate dirt or odorSevere dirt, odor, inefficiency, leakage

Signs You Might Need a Chemical Overhaul

Clean Aircon After Overhaul by CitycoolingSG

Watch out for these signs that indicate a chemical overhaul is due:

  • Aircon or piping condensation
  • Weak or no cooling
  • Leaking water
  • Rusty components
  • Musty or unpleasant odours
  • Unusual noises (buzzing, rattling)
  • Ice forming on coils
  • Increased electricity bills

These issues often stem from internal blockages or buildup that simple cleaning cannot resolve.

When Regular Cleaning Isn’t Enough

Basic servicing works for general upkeep, like filter washing and brushing accessible parts. But for deeper issues caused by dirt, mould, or clogged drainage, a chemical overhaul is more effective.

What’s included in an overhaul:

  • Full disassembly of an indoor unit
  • Soaking and scrubbing of fan coil, blower, and drain pan
  • Deep drain pipe flushing
  • Use of safe, professional-grade chemicals
  • Manpower and post-cleaning system test

How Often Should You Do a Chemical Overhaul?

For residential use, it’s recommended to do a chemical overhaul once a year. If your aircon is used frequently or in a dusty environment, consider doing it every 6–12 months to maintain performance and hygiene.

Long-Term Benefits

  • Fewer breakdowns and lower repair costs
  • Improved cooling performance and airflow
  • Lower energy bills due to better efficiency
  • Elimination of mould and allergens = cleaner air
  • Longer lifespan for your aircon unit

Transparent Pricing with City Cooling SG

Service TypePrice (before GST)
Chemical Overhaul (9–12K BTU)$130 per unit
Chemical Overhaul (18K BTU)$160 per unit
Chemical Overhaul (24K BTU)$180 per unit
Chemical Wash (no dismantle)$85 per unit
Chemical Wash (condenser)$120 per unit

*Final pricing is subject to GST.

🌟 Why Choose City Cooling SG for Your Overhaul?


✅ Experienced Technicians
Our team has over 10 years of experience with all major aircon brands in Singapore.

💵 Transparent Pricing
No hidden charges. What you see is what you pay—clear breakdowns for all services.

🧪 Quality Chemicals Used
We use non-corrosive, eco-friendly chemicals that are safe for your family and pets.

🏠 Trusted by Thousands
From HDB flats to condos to commercial buildings, City Cooling SG has earned the trust of customers islandwide.

Book Your Service with Confidence

Experiencing poor airflow, leaks, or unusual odours? Contact us & let our team handle it with a professional chemical overhaul that gets your aircon running like new.

📞 WhatsApp us now at +65 9123 4567
🌐 Fast, reliable service throughout Singapore