How to Clean Cassette Air Conditioner Systems in 5 Easy Steps: Follow Our Guide

The cassette air conditioner. Over the years, it’s perhaps been more commonplace in commercial properties and public buildings than in residential settings.

However, ceiling cassette air conditioners are showing signs of growing in popularity in homes across Australia.

If your home proudly boasts one of these masterful heating and cooling appliances, it’s important to know how to clean cassette air conditioner systems thoroughly to keep your home comfortable and your bills low.

Thankfully, it’s a relatively simple task, and one that ensures your cassette air conditioner functions with maximum ease. Let’s find out how.

Why Regular Cleaning is So Important

Consistent, regular cleaning is essential to keep your cassette air conditioner running smoothly, with no interruptions to the cool air.

Dust, debris and bacteria can build up in ceiling cassette air conditioners over time. This results in weak air flow coming from your system.

It also diminishes the efficiency of your air conditioner and affects the overall air quality in your home. By maintaining the air filters, evaporator coils and drainage system you can have efficient cooling and avoid costly repairs.

Regular cleaning of your cassette AC system allows it to keep performing at its best and extends the life of your system. It saves you money and provides healthy, clean air to your home.

Before You Begin

Before you start cleaning your air conditioning system, take these basic precautions:

• Turn the unit off: Switch off the air conditioner and the circuit breaker to avoid electrical problems.
• Grab your tools: For this job, you’ll need a vacuum cleaner, soft brush, soft cloth, mild detergent and a bowl of soapy water ready.
• Clear the area: Lay down a drop cloth or old towel under the indoor unit to catch any drips or debris.
• Beef up the ventilation: Get some good airflow going in the room to avoid irritation from your cleaning agents.

Putting these safety precautions in place will make the cleaning process safe and effective so you can do your maintenance with confidence.

Once that’s all done, here’s what you need to do.

Step 1: Power Down and Check the Unit

The first step in learning how to clean a cassette aircon? Shut the unit down and give it a thorough examination. Of course, “thorough” to the untrained eye will be vastly different to that of a licensed technician, so definitely keep that in mind.

You’ll hopefully have done this to your air conditioner prior to cleaning as part of the safety precautions. But if not, now’s the time to switch off the unit and shut off the circuit breaker. This will stop electrical shocks from occurring and protect the internal components as you work.

Once you’ve shut off the air conditioner, take a look at the indoor unit – specifically the air filters, fan housing and evaporator coils. Look for dust, debris or any other obstruction that can block airflow or cause weak airflow from the system.

A comprehensive initial inspection will enable a detailed, deep cleaning process, optimal performance and efficient cooling.

Step 2: Remove and Clean the Air Filters

Removing and cleaning the air filters is key to the efficiency of your cassette air conditioning system.

Start by gently removing each air filter from the unit. Try to avoid bending or damaging the filters as they’re essential to keeping dust and debris out of your indoor air. Use a vacuum cleaner with a soft brush attachment to remove surface dust.

For a deeper clean, wash the filters in soapy water with mild detergent and make sure they’re free from stubborn dirt. Rinse them well and allow them to completely dry before putting them back in the unit.

Clean air conditioner filters will minimise weak airflow and improve air quality. They’ll also keep your cassette system running smoothly for efficient cooling.

Step 3: Evaporator Coils and Fan Housing

The next step in how to clean cassette air conditioner systems is cleaning the evaporator coils and fan housing. This enables your cassette air conditioner to deliver its best possible performance, both in effectiveness and efficiency.

Start by using a coil cleaner to remove dust and debris from the evaporator coils. This will prevent airflow blockages and support efficient summer cooling.

Next, use a soft cloth to wipe down the fan housing; be thorough but gentle so you don’t damage the components. A soft brush can help you reach the corners and crevices where dust tends to accumulate.

This part of the process won’t just improve air circulation; it will also prevent bacteria growth and excess moisture that can affect air quality and cause water leaks. Regular maintenance in these areas will keep your aircon running efficiently.

Step 4: Drain Pan and Drainage System

Checking and cleaning the drain pan and drainage system is important to keep your cassette aircon running smoothly.

Begin by carefully removing the drain pan and check for any build-up of excess moisture, dirt or any other debris. Wipe it clean with a soft cloth and soapy water; make sure it’s free from any build-up that can be a breeding ground for bacteria.

Next, check the drainage system for any blockages. Use a garden hose or a vacuum to clear any obstruction, make sure water can flow freely. This will prevent water leaks and reduce the risk of excess moisture causing problems in the aircon system.

Proper maintenance of these parts will support efficient cooling and extend the life of your cassette air conditioning unit.

Step 5: Reassemble and Test the Unit

The final step in the “how to clean cassette air conditioner systems” process is to reassemble and test your cassette air conditioner.

Once you’ve got all parts dried, carefully put them back in their original position. Double check that the air filter and fan housing are securely in place and the electrical connections are safe and intact.

Switch the circuit breaker back on and turn on the unit. As the aircon starts, listen for any unusual noise and check for weak airflow. Make sure cool air is flowing and the system is running smoothly. This is important to ensure your aircon runs efficiently, provides clean air and optimal performance for a healthier and more comfortable home.

Now, if at all you’re not confident in pulling apart your AC unit and putting it back together, don’t risk further avoidable damage by going the DIY route. You’re much better off placing your system in the reliable hands of a licensed air conditioning technician. Speaking of…

When to Call an Air Conditioner Technician

Sometimes, when you put your cassette air conditioner through a thorough clean, problems can apparent that need professional help. Knowing when to call a licensed aircon technician can save you from costly repairs and ensure your air conditioner keeps running at its best. Here are the situations when you’ll likely need expert help:

• Weak air flow persists: If cleaning doesn’t solve poor air flow from the unit, there may be internal blockages or deeper problems.
• Unusual noise: Any rattling, buzzing or clanging sound suggest likely mechanical problems that need professional attention.
• Water leaks: Excess moisture or water coming out from the cassette aircon means a potential drainage system problem.
• Electrical issues: Electrical connections should always be handled by a licensed technician for safety.

Contacting a professional will ensure your aircon is safely serviced and maintained for long term, efficient cooling and healthy air.

Keep Your Cassette Aircon in Top Condition

Cleaning your cassette aircon is easy way to ensure your home has efficient cooling and clean air.

By following simple steps like the air filter clean, the evaporator coil check and drainage system maintenance, you can stop poor air flow, reduce energy consumption and extend the life of the unit. Routine maintenance will keep bacteria and excess moisture away, improve air quality and protect your indoor space.

If you encounter complex issues or need deep cleaning that extends beyond basic maintenance tasks, don’t hesitate to call a licensed aircon technician. Regular care and professional servicing will keep your aircon running at its best and your home comfortable all year round.

Please note: Thanks for reading our blog “How to Clean Cassette Air Conditioner Systems in 5 Simple Steps”. This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.