Why Regular Maintenance Matters
Your Fujitsu air conditioner works hard to keep your home comfortable through sweltering summers and cold winters. Like any mechanical system, it performs best — and lasts longest — when it receives regular care. Neglecting maintenance leads to reduced efficiency, higher electricity bills, and potentially costly repairs down the track.
This checklist covers everything you should be doing monthly, seasonally, and annually to protect your investment.
Monthly Maintenance Tasks (DIY)
Clean the Air Filters
This is the single most important thing you can do as a homeowner. Dirty filters restrict airflow, forcing the unit to work harder and consume more energy. Fujitsu indoor units have easily accessible filters that can be removed, rinsed under warm water, air-dried, and replaced.
- Turn the unit off before removing filters
- Slide out the filter panels from the front of the indoor unit
- Vacuum loose dust, then rinse with lukewarm water
- Allow to dry completely before reinserting — never use a dryer or direct heat
- Some Fujitsu models have a filter sign indicator light — reset it after cleaning
Check the Drainage Tray
The condensate drain removes moisture extracted from the air. Check that water is draining freely and there's no sign of mould or blockage in the drip tray.
Seasonal Maintenance Tasks
Before Summer
- Run the unit in cooling mode and check it reaches the set temperature
- Inspect the outdoor unit — clear away any leaves, debris, or vegetation that has grown around it
- Check that the outdoor unit's fins are not bent or clogged with dirt
- Test the remote control and replace batteries if needed
- Wipe down the indoor unit's housing with a damp cloth
Before Winter
- Run the unit in heating mode to confirm it operates correctly
- Check the defrost function is working (a brief cycle where outdoor unit appears to steam is normal)
- Ensure the outdoor unit is not obstructed by furniture, fencing, or stored items
Annual Professional Service
Once a year, it's worth having a licensed technician service your Fujitsu system. A professional service typically includes:
- Deep cleaning of the indoor coil (evaporator)
- Cleaning the outdoor coil (condenser)
- Checking refrigerant levels and inspecting for leaks
- Inspecting and tightening electrical connections
- Checking the compressor operation
- Lubricating fan motors if applicable
- Flushing the condensate drain line
Signs Your Fujitsu Unit Needs Attention
| Symptom | Likely Cause | Action |
|---|---|---|
| Reduced airflow | Clogged filters or blocked coil | Clean filters; book a service |
| Water dripping indoors | Blocked drain line | Clear drain; book a service if persists |
| Unusual odours | Mould on coil or filters | Clean filters; professional coil clean |
| Increased energy bills | Dirty coils or low refrigerant | Book an annual service |
| Error codes on display | Various faults | See troubleshooting guide or call a technician |
Maintenance Tips for Ducted Fujitsu Systems
Ducted systems require additional attention to the duct network itself. Inspect accessible ductwork for damage, check that all supply and return air grilles are unobstructed, and have the duct system inspected for leaks every few years.
Protecting Your Warranty
Fujitsu's product warranty requires that the system is serviced and maintained in accordance with the owner's manual. Keeping records of filter cleans and professional services is good practice, especially if a warranty claim ever becomes necessary.