What is aircon chemical overhaul?

Scope of Service


  1. First, we check the condition of the coil and if it is suitable to do chemical overhaul
  2. Next we check if the all part of the Air-conditioner are functioning well (E.g flap).
  3. Following which, we will lock the gas at the condenser unit.
  4. Next we will remove the entire fancoil from the wall
  5. Then we will dismantle the evaporator coil from the other components.
  6. After which we will proceed to spray the evaporator coil with chemical solution
  7. And we will wash the entire evaporator coil with high pressure jet
  8. Next we will assemble the entire unit
  9. And fix the indoor unit back to the wall.
  10. We will unlock the gas again. And test the functioning of the Air-conditioner
chemical overhaul price

Why do I need aircon chemical overhaul in singapore?

Aircon not cold?

Build up of dust

The build up of dirty particles will hinder proper airflow into the evaporator coil . Excessive dirt and dust reduces the aircon efficiency and increases overall energy consumption. This can be quickly identified if the air is emitted out intermittently, and not smoothly. Thankfully, this can be easily be negated by regular chemical overhaul.

Leakage or choke

Backtray choking could potentially lead to leakage, this is the result of dirt, algae, bacteria or mould. Aircon with leaking issues could reduce air quality and requires high pressure cleaning to clear off all debris. Households which use their air conditioners very frequently are recommended to clean their air conditioning units at least once a year. 

Aircon leaking water?

Water leak

Drainage pipe choke, choke back tray, condensation of copper pipe & loose connections of water pipe could all lead to water leakage in your aircon units. Aircon chemical overhaul would be able to resolve the choking issues. For other issues like condensation and loose piping, more in depth investigation and work needs to be done.

Effects of chemical overhaul

Before chemical overhaul

aircon before chemical overhaul

Aircon after chemical overhaul

Aircon after chemical overhaul

Which should I choose? Aircon Chemical overhaul or normal chemical cleaning?

Difference between chemical wash and chemical overhaul

Aircon chemical wash simply means the cleaning of a unit with a chemical solution. The motherboard of the fancoil will be wrapped with a water proof material to prevent water damage to the motherboard. Inexperienced technicians might not handle this well given the level of difficulty of this task. 

Chemical overhaul translates to the extensive cleaning of the air conditioning unit. The gas will be locked, and this is done by climbing out to reach the condensing unit and then switching it off. Our technicians will then proceed to do a full dismantling of the fancoil and this allows us to clean it thoroughly on both sides! 

The biggest difference? A chemical washing cleans the surface and front end of the fancoil but a chemical overhaul cleans the whole fancoil! 

Aircon Chemical Overhaul

Emergency aircon repair singapore

Aircon Chemical Wash

Aircon Washing

How often should you do chemical overhaul?

Generally you don’t have to do schedule a time to do chemical overhaul. Your technicians will be able to advise you that they will have to do chemical overhaul the next trip. Or sometimes they will be able to do for you on the spot. You will only need to do Aircon chemical overhaul on these 2 conditions. Either your Aircon evaporator coil is clogged and Air is not blowing smoothly. Or water is leaking from the back tray. For normal Aircon users. You generally only need to do once a year or once every 2 years. Nonetheless, do take note that when the time comes for you to do chemical overhaul. Do not opt for normal chemical cleaning instead. It will be a waste of your money.


At Silverback Aircon Solutions, we strongly believe in providing our honest services to solve your problems. Our company do not charge additional for unnecessary work nor do we advise unnecessarily because solving your air conditioning needs is our business. 


FAQ for aircon chemical overhaul

How often should you chemical overhaul your aircon?

Some experts recommend chemical overhaul once at least every 6 months in order to ensure that 95 % of its efficiency can be maintained.

How much does it cost to chemical wash your aircon?

Here at silverback aircon, chemical wash of an aircon compressor is $70. For our system 1 inverter condenser unit, the chemical wash costs $250, we actually need the specific model of the aircon for a more accurate price. For system 1 non inverter condenser unit, the chemical wash costs $200. For system 2,3,4, non inverter, chemical wash would cost $500. For other systems, you may contact us directly at our hotline.

In summary, what does chemical overhaul do for your aircon?

Chemical overhaul is basically carried out on air conditioners in order to restore their optimal performance. The aircon is thoroughly cleaned to avoid more expensive and extensive aircon repairs in the future.

Is chemical wash or chemical overhaul better ?

Chemical overhaul is a more extensive form of chemical cleaning for your air conditioning units. The entire air conditioning unit would be dismantled into the internal components such as PCB, fan motor, blower wheel, drain pan and evaporator coil. Such internal components are then checked and washed with chemical solutions which rids of grime and mould.