What’s Aircon Chemical Wash and Overhaul?

air condition services

Regular maintenance of your air conditioner is vital to ensure its longevity. Cleaning your aircon is a way to maintain it better, but sometimes regular servicing may not be sufficient.

Regular servicing, though it helps to clear away the dirt in your aircon, may not be that effective in getting rid of the gunk accumulated and stuck in your condenser, filer and evaporator coil of your aircon.

Further having improper cleaning techniques may cause severe damage to the internal components. This is when you need an aircon chemical wash or an overhaul.

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What’s Aircon Chemical Wash?

If your air conditioning unit does not blow cold air or takes a long time to cool your room even after cleaning the air duct, your aircon technician might recommend a chemical wash on your air conditioning unit.

An aircon chemical wash is a process where you disassemble all the parts inside the air condition (compressor, filter, condenser, etc.) and soak them in a chemical solution. The internal pipes of the air conditioner are also flushed with a chemical solution. This helps to remove sticky debris and acids from the air conditioning parts. Find out about the cost of chemical washing and other aircon services here.

It is the process where the internal components of your air-con get washed down with chemicals. First, your unit would be taken apart, exposing the evaporator coils, condenser and air filters. The parts are then placed in a chemical solution which would help remove any dirt particles, and corrosive acid stuck onto the pieces.

The chemical wash could also be used to wash down the drainage pipes to ensure that any algae or gunk is wholly eroded and washed out.

Helpful read: HDB guidelines on aircon installation and servicing

Is chemical wash for aircon necessary?

Aircon chemical wash is an essential service. Regular cleaning may get rid of some dirt and dust particles. Still, there is much other toxic gunk that has been accumulated in the condenser, filter, and evaporator coil over time.

Toxic gunk is hard to get rid of and could corrode and cause severe damage to the internal component of your unit, affecting the effectiveness and performance of your aircon. Thus, it is wise to give your aircon unit a chemical cleaning at least once every six months.

Helpful read: Aircon repair and maintenance prices in Singapore

Why should you opt for chemical washing?

Better air quality

The most obvious benefit of a chemical wash is that your air conditioner parts are thoroughly cleaned. Hence, the quality of air coming from your air conditioning unit will be better than before.

This keeps the air fresh indoors and helps your family avoid respiratory or health problems arising from poor air quality in your home spaces.

Reduced frequency of breakdowns

Frequent maintenance and chemical washing keep your air conditioning unit free from possible malfunctions caused by damaged parts or accumulated dirt in your air conditioner.

Condensation that causes water leakage from your air conditioner will also reduce after a chemical wash. This keeps your aircon system in good condition and saves thousands in costs from damage repairs.

Helpful read: How to calculate aircon BTU

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Enhances performance

Cleaning up the impurities from your air conditioning system parts unclogs the ventilation system, which improves the overall performance of your air conditioning unit.

Your aircon will cool your room quicker and perform more efficiently. This helps you save on the electrical bill and the cost of repairing your air conditioner.

With improved performance, due to the removal of any blockage or clogging, it allows for your aircon unit to run as effectively as possible, your room quicker and perform more efficiently. As such, chemical washes potentially helping you to save hundreds or thousands on those electricity bills over the next few years.

For more FAQ about air conditioning, you can check out our article on commonly ask a question about air-conditioning.

Chemical Wash Process

Aircon chemical wash involves an extensive overhaul of the air conditioning fan-coil unit. The chemical liquid is usually used when a general cleaning of the aircon unit does not improve the condition.

Professionals will dismantle the aircon unit, such as fan coils, water trays, and air filters and wash those with a chemical-based solution.

This help washes away accumulated dust and dirt, eliminate mould, thereby increasing the cooling efficiency of your system.

During the chemical wash, these are the everyday things that will be done:

  • Cleaning and checking of air filter, front panel & cover
  • Checking, deodorising and purifying of aircon filter
  • Cleaning and checking indoor evaporator coil
  • Cleaning and checking indoor drainage tray
  • Vacuuming of drainage pan
  • Vacuuming of a drainage system
  • Checking of fan bearing and lubrication (if necessary)
  • Checking compressor suction and discharge pressure
  • Tightening of electrical contacts
  • Use several chemical-based cleaners to remove dust, oil and dirt in various parts.
  • Use unique, formulated sanitising mixture.

** Do note that different companies may cover various aspects, not all companies provide the same level of service.

How much does an aircon chemical wash cost?

An aircon chemical wash that does not require the dismantling of the unit or only requires partial dismantling costs around $85 to $100. If the fan coil, electronic control and other parts of the aircon unit require dismantling for the chemical wash process, then the cost goes up to $150 to $200.

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What is an aircon overhaul?

In the event the chemical wash is insufficient to clean the system thoroughly, professionals may propose a chemical overhaul for your air-conditioning system.

After the check through of your unit will help the professional, then tell you if your aircon unit needs an overhaul or just a simple chemical cleaning procedure.

In general, professionals recommend you to do at a chemical wash or overhaul at least once a year to keep the aircon running at optimal efficiency.

What is done during an aircon overhaul is the dismantling and cleaning of the aircon parts. Certain parts being either repaired or replaced (varying on the damaged of your aircon).

Helpful read: Why is my air-conditioning unit not cold

When do you need an overhaul?

Here are some instances where overhaul would be needed:

  1. When the vents are being clogged due to dust particles or gunk
  2. Clogging of drain pipes, resulting in water leakage
  3. Damage of evaporator coils
  4. Damage of fan bearings
  5. Faulty or damaged air filters

After getting a chemical overhaul, you can expect your unit to be as good as new!

The rough estimate of getting an overhaul for your aircon is about $130-$180 SGD for an aircon unit.

It is always a good idea to have your aircon clean and to maintain it regularly so that you can not only ensure that you would not be faced with costly aircon repair charges, but also that your unit will last you longer.

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What is done for an aircon overhaul?

These are the everyday activities done for aircon chemical overhauls:

  • Lubricating fan bearings to reduce noise and increase efficiency
  • Checking and monitoring thermostats and controls of the unit
  • Cleaning pipes, blower wheel and drain pans with appropriate chemicals
  • Cleans fan evaporator coil to remove dust and grime, increasing efficiency
  • Replaces faulty bearings and eliminates operational noise

** Do note that different companies may cover various aspects, not all companies provide the same level of service.

You can find aircon chemical overhaul companies on Homees.

What is the difference between a chemical wash and a chemical overhaul?

While both processes help in cleaning your aircon, a chemical wash and a chemical overhaul are actually different. An aircon chemical wash will ensure that the basic components of your aircon, such as the air filters and coils are cleaned properly. This helps to prevent the growth of substances such as mould, which would have detrimental effects on your health.

On the other hand, a chemical overhaul goes deeper than a chemical wash. It helps to ensure that the aircon pipes are clean, which will facilitate better airflow for your aircon and lead to better efficiency and performance.

While an aircon chemical wash is recommended once every six months, an aircon chemical overhaul should be done once every year. However, if your aircon is not functioning as well as you’d like, you can always consult a professional to check if you should increase the number of chemical overhauls.

In summary, an aircon chemical wash ensures that your aircon unit is free from substances like mould so that it can produce air with better quality. On the other hand, a chemical overhaul process leads to better aircon performance by ensuring that the worn-out components are replaced. To better ensure better maintenance and durability of your aircon unit, you should engage in both chemical wash and chemical overhaul.