# Aircon Chemical Wash Serangoon from S$80 | Fixed Quote > Aircon chemical wash in Serangoon from S$80 per unit. Coil, blower wheel and drain parts deep-cleaned on the wall. Fixed quote, no callout fee, 90-day warranty. URL: https://airconservicingserangoon.com/chemical-wash/ Serangoon - Fixed Quote First # Aircon Chemical Wash in Serangoon for Weak Cooling and Musty Smells Last updated: 11 November 2026 Deep clean of the coil, blower wheel and drain parts with the indoor unit left on the wall, for weak cooling and mild smells. - No callout fee - Pay after the job - 90-day warranty WhatsApp for a Fixed Quote [https://wa.me/6594273833 →](https://wa.me/6594273833) See Prices [#pricing →](#pricing) Or call +65 9427 3833 [tel:+6594273833 →](tel:+6594273833) | Mon-Sat 9am-9pm, Sun 9am-8pm ![Technician applying chemical cleaner to the evaporator coil of a wall-mounted aircon in a Serangoon HDB bedroom](/images/misc/technician-spraying-chemical-coil-cleaner-onto-eva.webp) 90-Day Workmanship Warranty Price From S$80 per unit 2007 Serving Singapore Since 4,560+ Units Serviced 90-Day Workmanship Warranty 7 Days Until 9pm Mon-Sat Cool Earth Aircon: 4.0 on Google (66 reviews) | 380+ jobs a month across Cool Earth Aircon ## What Is an Aircon Chemical Wash? Does your aircon still struggle after a normal service? An aircon chemical wash is often the step that fixes it. Brian started Cool Earth Aircon as a one-man workshop in 2007, and the units that need this extra clean look much the same today as they did then. A chemical wash is the next step up from general aircon servicing [/ →](/) . The indoor unit stays on the wall, and the job goes like this: 1. The technician sheets the wall and floor. 2. A wash bag goes under the unit to catch the runoff. 3. Coil cleaner goes onto the **evaporator coil** (the cold coil that pulls heat out of your room) and the **blower wheel** (the drum-shaped fan that pushes cold air out). 4. The cleaner works on the dirt, mould and **biofilm** (a slimy layer of microbes). Then it’s flushed out with water, along with the **drain pan** and **condensate drain line**. A normal service cleans the filters and checks the coil. It can’t get deep into the coil fins or the curved blades of the blower wheel. That’s where grime builds up in a Singapore home, because units here run almost every day in hot, humid air. When the coil is coated, the unit moves less heat. When the blower wheel is caked, it pushes less air. Both make the room slow to cool. Prices start from **S$80 per unit**. That sits at the low end of the S$80 to S$100 range that Billy Aircon’s 2026 price table lists for a wall-mounted wash without dismantling. The final price depends on the unit type and its condition, and you always get a fixed quote before any work starts. There’s no callout fee for Serangoon, and the work carries our **90-day workmanship warranty**. Singapore price guides also put a non-dismantle wash at roughly 45 to 60 minutes per wall-mounted unit, so a flat with 2 to 4 units fits into a single visit. ## When Does Your Aircon Need a Chemical Wash? Book a chemical wash when a normal service is no longer enough. These are the signs we see most in Serangoon homes: - **Cooling is still weak after a normal service.** The filters are clean but the room takes a long time to cool. - **A musty smell at start-up.** It fades after a few minutes, then returns the next day. - **Visible mould on the fins or blower.** Shine a torch into the air outlet. Black spots on the blower wheel are a clear sign. - **The leak comes back after a drain flush.** Sludge in the drain pan keeps choking the line. How often should you book one? Helpling’s Singapore guide suggests every 6 months for HDB bedroom units that run 10 to 12 hours a day. Other local guides say every 6 to 12 months for lighter use. With 2 to 4 units in your flat, start with the bedrooms that run every night. The living room unit can follow on a longer cycle. If the smell is strong and sour, black specks blow out, or the drain pan holds jelly-like sludge, the mould is usually too deep for a wash. In that case a chemical overhaul [/chemical-overhaul/ →](/chemical-overhaul/) is the better fix, and the technician will tell you before you pay. ## Common Problems a Chemical Wash Solves ### Slow cooling in the bedroom at night Bedroom units in HDB flats run every night. Dust and moisture build a film on the coil, and the room takes longer to cool each month. A wash clears the coil so the unit can move heat properly again. You’ll usually notice it on the first night. ### A smell that comes back after every service A light musty smell often comes from mould spores on the blower wheel. Local mould-removal specialists such as Pico X point to the blower wheel, evaporator coil and drain pan as the main places mould grows, because moisture collects there. Filter cleaning doesn’t reach any of those spots. The coil cleaner and rinse remove the growth, so the smell goes with it. ### Drips that return a few weeks after a drain flush If the drain pan is coated in sludge, a flush clears the line for a while but the sludge washes back in. Cleaning the pan and the line together stops the cycle. Standing water is worth sorting out quickly. Singapore pest control firm Origin Exterminators notes that Aedes mosquitoes can complete their life cycle in as little as seven days. A wash has limits, though. It cleans a coil, but it won’t re-slope a drain pipe, seal a gas leak or replace a worn part. For leaks caused by pipe faults, see aircon water leak repair [/aircon-water-leak-repair/ →](/aircon-water-leak-repair/) . ### Higher power use with the same settings A dirty coil makes the compressor work longer to reach the set temperature. Cleaning the coil helps the unit cycle normally again. Watch your bill after the wash. If the same settings now cost less to run, the coil was part of the problem. ## Chemical Wash vs General Servicing vs Overhaul | | General Servicing | Chemical Wash | Chemical Overhaul | | --- | --- | --- | --- | | Unit on the wall? | Yes | Yes | No, taken apart | | Coil and blower | Checked, light clean | Chemical clean and flush | Each part cleaned by hand | | Best for | Routine care every 3-4 months | Weak cooling, mild smell | Heavy mould, sour smell, sludge | | Price | S$50 for 1 unit | From S$80 per unit | S$130-S$180 per unit | Not sure which one you need? Read the signs your aircon is due for servicing [/guide/signs-aircon-due-for-servicing/ →](/guide/signs-aircon-due-for-servicing/) , or WhatsApp a photo of the air outlet and we’ll tell you what we see. ## How to Keep the Unit Clean After the Wash After an aircon chemical wash, regular general servicing every 3 to 4 months keeps the coil from coating up again so quickly. Rinse the filters every few weeks between visits. Filters are the easy win here. A clean filter stops most of the dust before it reaches the coil. If you’d rather not track the dates yourself, our annual servicing contract [/contract/ →](/contract/) books four visits a year for you with priority slots. WhatsApp us to book your wash, or send a photo of the air outlet first and we’ll tell you if a wash will do the job. Published Prices ## How Much Does Chemical Wash Cost in Serangoon? From S$80 per unit. Final price depends on unit type and condition. Fixed quote before work. No callout fee for Serangoon. Pay after the job. ### General Servicing 1 unit, per visit S$50 - Filter clean - Coil check - Drain flush - Airflow test Book Now [https://wa.me/6594273833 →](https://wa.me/6594273833) This service ### Chemical Wash per unit From S$80 - Coil chemical clean - Blower wheel clean - Drain pan and line flush - Cooling test - 90-day warranty Book Now [https://wa.me/6594273833 →](https://wa.me/6594273833) ### Chemical Overhaul per unit S$130-S$180 - Full dismantle - Every part cleaned - Wear check - Reassembly and test Book Now [https://wa.me/6594273833 →](https://wa.me/6594273833) Compare every service on our full aircon price list [/aircon-servicing-price/ →](/aircon-servicing-price/) . Why Choose Us ## Why Choose Aircon Servicing Serangoon for Chemical Wash? ### Price Before Work You get a fixed quote before we start. No callout fee and no surprise add-ons on the day. ### Right Clean for the Unit If a wash will not fix it, we say so before you pay. Heavy mould may need an overhaul instead. ### Tidy Job Walls and floors are sheeted. The area is cleaned up before we leave. ### 90-Day Warranty If the same fault comes back within 90 days, we return and fix it at no extra charge. ### Evening and Sunday Slots Open until 9pm Monday to Saturday and until 8pm on Sunday. ### All Common Brands Inverter and non-inverter wall-mounted units from Daikin, Mitsubishi Electric, Panasonic and more. The Process ## How Does Chemical Wash Work? The technician confirms the work and the price with you before starting. You pay after the job. 1. 1 ### WhatsApp Us Send the number of units, the symptoms (weak cooling, smell, leak) and your Serangoon address. 2. 2 ### Fixed Quote We quote from S$80 per unit based on unit type. You pick a slot, including evenings and Sundays. 3. 3 ### Check and Cover The technician checks each unit, confirms the work with you, then sheets the wall and floor. 4. 4 ### Wash and Flush Coil cleaner goes on the coil and blower wheel, is left to work, then is flushed out with the drain parts. 5. 5 ### Test and Pay Each unit is tested for cold air and airflow. You pay after the job and the 90-day warranty starts. ## Not sure if you need a service, a wash or a repair? Tell us what the unit is doing. We will tell you what it probably needs and give you a fixed quote before anyone picks up a tool. WhatsApp Us [https://wa.me/6594273833 →](https://wa.me/6594273833) +65 9427 3833 [tel:+6594273833 →](tel:+6594273833) On the Job ## What a Chemical Wash Looks Like Click any photo to see it larger. Reviews ## What Serangoon Customers Say Cool Earth Aircon: 4.0 on Google (66 reviews). We are part of Cool Earth Aircon, servicing Singapore homes since 2007. **4.0** on Google (66 reviews, Cool Earth Aircon) > "Told me the price on WhatsApp before coming. Serviced 3 units in our Serangoon Central flat, cleaned up after and tested each one. No extra charges." M Mei Ling T. Serangoon Central > "Bedroom unit kept leaking onto the wall. The technician cleared a choked drain line and showed me the sludge. No more dripping since." R Ravi K. Serangoon North > "Had a chemical overhaul on two old units in our Serangoon Garden house. The sour smell is gone and the rooms cool much faster." D Daniel O. Serangoon Garden Got Questions? ## Chemical Wash FAQs ### How much is an aircon chemical wash in Serangoon? A chemical wash starts from S$80 per unit. The final price depends on the unit type and its condition, and you get a fixed quote before any work starts. There is no callout fee for Serangoon. ### Do I need a chemical wash or a chemical overhaul? A chemical wash suits weak cooling and mild musty smells, and the unit stays on the wall. A chemical overhaul (S$130-S$180 per unit) suits heavy mould, strong sour smells, jelly-like sludge or units with no service for over a year, because the unit is taken apart. ### How long does a chemical wash take? It depends on the unit type, its condition and how many units you have. The visit covers sheeting, cleaning, flushing and a cooling test, and the technician confirms the expected time with your fixed quote. ### How often should I get a chemical wash? There is no fixed rule. Most homes book one when cooling stays weak after a normal service or a musty smell comes back. Regular general servicing every 3 to 4 months means you need chemical washes less often. ### Will a chemical wash remove the musty smell? Usually, yes, when the smell comes from mould and biofilm on the coil, blower wheel and drain pan. If the smell is strong and sour, or black specks blow out, the mould is often deeper and an overhaul works better. ### Is the chemical safe for my home? The coil cleaner is applied only to the indoor unit's coil and blower area and is flushed out with water before the unit is tested. The wall and floor are covered during the job, and the room should be aired out as normal afterwards. ### Can a chemical wash fix a leaking aircon? It often does when the leak comes from sludge in the drain pan or a partly choked drain line, because both are cleaned and flushed. If the leak is from a pipe fault or the unit's tilt, we will tell you and quote that repair separately. ### Do you chemical wash inverter units? Yes. We clean inverter and non-inverter wall-mounted split units from all common brands. The electronics are protected during the wash. ### What is covered by the 90-day warranty? If the same fault we worked on comes back within 90 days, such as a leak we cleared or cooling we restored, we return and fix it at no extra charge. ### Still have a question? Send us a WhatsApp with your units and the problem. We reply with a fixed quote. Chat on WhatsApp [https://wa.me/6594273833 →](https://wa.me/6594273833) ## Related Services ### Aircon Chemical Overhaul The indoor unit is taken apart and each part is cleaned, checked for wear and rebuilt, for heavy mould, strong smells and long-neglected units. S$130-S$180 per unit View service [Aircon Chemical Overhaul →](/chemical-overhaul/) ### Aircon Servicing Contract Four servicing visits a year with priority booking, at a lower total price than four single visits. From S$200 a year View service [Aircon Servicing Contract →](/contract/) ### Aircon Not Cold Repair Finds and fixes the cause of weak or warm air: dirty coils, low refrigerant, failed parts or an outdoor unit that is not running. From S$60 View service [Aircon Not Cold Repair →](/aircon-not-cold-repair/) ### Aircon Water Leak Repair Clears choked drain lines and fixes drain pan and pipe faults that cause dripping. From S$60 View service [Aircon Water Leak Repair →](/aircon-water-leak-repair/) Same-day slots in Serangoon, subject to availability ## Ready to Book Chemical Wash? Send your units, the problem and your Serangoon address. We reply with a fixed quote for aircon chemical wash. No callout fee, 90-day workmanship warranty. WhatsApp (fastest reply) +65 9427 3833 [https://wa.me/6594273833 →](https://wa.me/6594273833) Call us +65 9427 3833 or +65 6810 6706 [tel:+6594273833 →](tel:+6594273833) Open 7 days Mon-Sat 9am-9pm, Sun 9am-8pm WhatsApp for a Fixed Quote [https://wa.me/6594273833 →](https://wa.me/6594273833) See All Prices [/aircon-servicing-price/ →](/aircon-servicing-price/) - Fixed quote first - No callout fee - Pay after the job - 90-day workmanship warranty