Regular home aircon unit maintenance keeps your system running efficiently, extends its lifespan, and helps avoid costly repairs. This guide covers the maintenance tasks worth prioritising, and which are best left to a professional.
Why Maintenance Matters
A neglected air conditioning unit works harder to achieve the same cooling result, which increases running costs and shortens the system’s lifespan. Regular upkeep is one of the simplest ways to protect your investment. Our running cost guide explains how maintenance directly affects your electricity bill.
Tasks You Can Do Yourself
Clean or Replace Filters Regularly
Dirty filters restrict airflow, forcing the unit to work harder. Most manufacturers recommend cleaning filters every 2-4 weeks during regular use, particularly in dusty environments.
Keep the Outdoor Unit Clear
For split systems, make sure the outdoor unit has clear airflow, free from leaves, debris, or overgrown plants. A blocked outdoor unit reduces efficiency and can strain the compressor over time.
Check for Unusual Noises or Smells
Grinding, rattling, or musty smells often signal a developing issue. Catching these early, before they become serious faults, usually means a cheaper and simpler repair.
Tasks Best Left to a Professional
- Refrigerant top-ups or leak checks, which require F-Gas certified handling
- Deep cleaning of internal coils and components
- Electrical fault diagnosis and repair
- Annual servicing to check overall system performance
How Often Should You Service Your System?
An annual professional service is generally recommended for split systems used regularly through summer, ideally scheduled before peak season so any issues are caught before you need the system most. Portable units benefit from a similar seasonal check, though servicing needs are typically simpler.
Signs Your Unit Needs Attention
- Noticeably reduced cooling performance compared to previous seasons
- Ice forming on indoor or outdoor components
- Rising energy bills without a change in usage habits
- Water leaking or pooling around the indoor unit
If you’re still deciding which system to install, our home air conditioning buying guide covers the options available before maintenance becomes a consideration.
Frequently Asked Questions
How often should I clean my air conditioning filters?
Every 2-4 weeks during regular use is a good general rule, though check your specific manufacturer’s guidance for exact intervals.
Can I service my own split air conditioning system?
Basic tasks like filter cleaning are fine to do yourself, but refrigerant handling and deep servicing should always go to a qualified professional.
What happens if I skip regular maintenance?
Skipping maintenance typically leads to reduced efficiency, higher running costs, and a greater risk of costly breakdowns over time.
