In Singapore’s tropical climate, aircons typically run 8-12 hours daily to keep homes cool and comfortable. With prolonged usage, dirt, mould, and bacteria may accumulate in aircon units and cause various problems.
When regular servicing is no longer enough to keep your aircon at its optimal performance, you may look into a chemical wash or a chemical overhaul. What exactly is the difference between an aircon chemical wash and a chemical overhaul? Discover the comparison in this guide below to find out the one you need.
What is a Chemical Wash?
A chemical wash is a ‘deep cleaning’ service where your aircon is partially disassembled to access components that are typically not treated during regular servicing. With the aircon unit still mounted on your wall, the technician will start by carefully checking your aircon’s overall condition, looking for any signs of unusual noises or weak cooling. They will then remove the front panel and filters, and apply an alkaline-based cleaner to dissolve the grime or dirt that accumulates in your aircon.
After 10-15 minutes, they will then use a water spray to rinse off the debris and use a vacuum to clear any blockages in your drainage pipe. They will then conduct a full system test to confirm that your aircon is working properly.
Chemical washes can help to improve airflow and cooling efficiency in aircon units that feel less cool. With less grime buildup, the aircon can perform more efficiently, which may result in less electricity consumption.
What is a Chemical Overhaul?
A chemical overhaul is a more intensive service where the aircon unit is completely disconnected from your wall. Every part of the aircon is dismantled to inspect for any damage, including the drainage tray, fan motor, blower wheel, evaporator coil, and circuit board. Then, each component is chemically treated with an antibacterial and antiviral cleaning solution under high pressure to remove any debris and dust. The aircon fan coil and filter are also treated to remove any odours.
Next, the aircon water tray is soaked and scrubbed to remove stubborn mould and bacterial buildup. This process helps to eradicate the root cause of persistent issues in problematic aircon units such as water leaks, foul odours, and poor air quality. The aircon gas is also examined to ensure optimal cooling performance.
A chemical overhaul also includes the replacement of any failing components to help prevent future breakdowns. Since this procedure involves a more thorough treatment, it may significantly improve the aircon’s cooling and extend its lifespan.
Comparison Table
To help you understand the differences between an aircon chemical wash vs chemical overhaul, here is a table which summarises each service.
| Service | Chemical Wash | Chemical Overhaul |
|---|---|---|
Disassembly Level | Partial | Full unit |
Components Cleaned | Evaporator coils, blower wheel, drain pan | Every component individually |
Inspection and Replacement of Worn Out Parts | None | Yes |
Duration | 1–2 hours | 3–5 hours |
Price Per Unit | $80–$150 | $150–$200 |
Recommended Frequency | Every 6–12 months | Every 12-18 months |
Best For | Performance maintenance or restoration | Old units with frequent problems (noises, leaks, odours) |
When Do You Need a Chemical Wash?
A chemical wash is considered a general maintenance and deep cleaning for your aircon unit to keep it performing efficiently. It is recommended for units less than three years old that are moderately dirty, or have not been serviced for 6-12 months. You may also need it if your aircon has a slight musty smell or feels less cool.
When Do You Need a Chemical Overhaul?
A chemical overhaul is recommended if your aircon has been used for more than five years and shows signs like persistent weak cooling, unusual noises, bad odours, or frequent water leaks. It may also be necessary if you have not booked any chemical washes in the last 12–18 months. Outdoor aircon units may also need this service more than indoor ones, as they collect more environmental debris, construction dust, and residues from vehicle exhausts, which reduces heat dissipation efficiency and shortens their lifespan if left untreated. However, we recommend getting a chemical overhaul on an annual basis for all aircons to ensure that they are thoroughly cleaned.
Learn more about why your aircon needs a chemical overhaul.
Conclusion
A chemical wash and a chemical overhaul are both beneficial services for aircon units to keep them in prime condition, ensuring optimal cooling and comfort in Singapore’s tropical climate. Cool-Aire offers both aircon services performed by our professional technicians, who are ready to assess your unit’s condition and recommend the most suitable treatment based on the issues you are facing.
Experiencing specific issues with your aircon, such as weak cooling or foul odours, or just need a general cleaning? We will be delighted to help you out. Get in touch with us to book our services today!