A ducted air conditioning system provides a whole home comfort solution. Using a single system that is concealed in the ceiling, it’s a quiet, easy to operate and energy efficient method of heating or cooling multiple rooms, or the entire home, whilst using optional zone control.

Servicing a ducted system should be done every year or two, depending on use. However, there are a few tips on how you can maintain and keep your system operating at its best all year round and between services.

Check the vents and filters

Cleaning the filters of dust and debris will help the system operate at its peak. As a rule of thumb, cleaning your ducted air conditioning system at the start of the summer season, and again during winter, is ideal. 

The filters can be easily removed by undoing the hinged return air grille frame and sliding out the filter. Wash with warm, soapy water and allow to air dry before replacing the filter and repositioning the grille.

Repeat this process for all filters so that the air circulating throughout the entire system is unrestricted.

Don’t forget the outdoor unit

Throughout the year, leaves, dirt and dust can accumulate on and around the outdoor unit. This should also be swept or wiped down to remove the debris, clear away leaf litter and brush off gathered dust. Any obstructions surrounding the outdoor unit may restrict airflow and cause the compressor to work harder.

Cleaning ductwork

While it’s ok for you to gently wipe dust off the ductwork you can see just inside the grilles when you open them to remove the filters, this is mostly a job for the expert to include in their annual ducted air conditioning service appointment.

Having your ducted air conditioning system professionally checked every year will help to minimise, or swiftly identify, major issues. A Fujitsu General Assist service member or approved Service technician can also advise you of any potential requirements that may be needed in the near future, such as spare parts.

Ducted Aircon Maintenance: Frequently Asked Questions

How often should ducted air conditioning be serviced?

Your ducted air conditioning system should be professionally serviced every 1-2 years, depending on usage, to ensure its optimum functionality. In between services, it’s recommended that you clean your filters, depending on the usage the recommended time frame between cleaning your filters will vary. If you use your air conditioner daily, your filter should be cleaned at least once a month, if you use it less often, every three months should be sufficient.

How often do you need to change a ducted air conditioner filter?

Depending on the usage the recommended time frame between cleaning your filters will vary. If you use your air conditioner daily, your filter should be cleaned at least once a month, and for those that use it less often, every three months should be sufficient. Please note that the cleaner the filter, the better the performance.  It is also imperative that the filter be changed if it has cracked or degraded badly.

What are the benefits of cleaning my air conditioner regularly?

Regular cleaning of your ducted air conditioning system has benefits for both the unit itself and homeowners. Regular cleaning of the unit helps to maintain its efficient operation, prolong its lifespan and prevent breakdowns. As the owner,  regular ducted air conditioning maintenance improves the air quality of your indoor spaces and reduces energy consumption.

What are the signs that my air conditioner needs cleaning?

Your ducted air conditioning system may exhibit several warnings that it needs cleaning, including:

  • Reduced airflow

  • Increased energy bills 

  • Strange noises 

  • Unpleasant odours

  • Leaking water from ducts


Regular maintenance of your ducted air conditioning system will help it to operate as efficiently as possible. Knowing how to clean ducted air conditioner filters yourself will save you money on new parts and labour costs, however they must eventually be replaced. For all your ducted air conditioning maintenance needs, contact a Fujitsu General Assist technician to arrange a ducted air conditioning service appointment.