How Often Should Air Conditioning Be Serviced?

The general recommendation

For most domestic air conditioning systems used seasonally, an annual service is the standard recommendation. This gives the system a thorough check before the periods it's used most, catching small issues before they turn into breakdowns or expensive repairs.

Servicing frequency isn't a fixed rule for every system, though, and several factors can mean more frequent checks are worthwhile.

What can increase how often you need a service

Systems used more intensively, such as those running for long hours across a whole summer, or systems used for both heating and cooling year-round, generally benefit from more frequent attention than a unit only used occasionally in a spare room.

Factors that can mean more frequent servicing

• Heavy or year-round use, including heating mode in winter
• Dusty environments, building work nearby, or high footfall in commercial settings
• Pets in the home, which increase airborne hair and dander reaching filters
• Systems in kitchens, salons or workshops with higher levels of grease, product particles or debris in the air
• Older systems that are more prone to developing minor faults

What a service typically includes

A thorough service covers cleaning or replacing filters, checking the condensate drainage is flowing freely, inspecting the outdoor unit for debris or damage, and checking refrigerant pressures and electrical connections are within expected parameters.

The engineer will also run the system through its modes to confirm it's cooling and, where applicable, heating correctly, and flag anything that looks like it's starting to wear or fail.

Commercial systems and usage patterns

Commercial air conditioning, such as in offices, shops or salons, is often used for far longer hours than a typical domestic system, sometimes running most of the working day across many months of the year. This heavier duty cycle can justify servicing more than once a year, particularly for systems supporting a business that can't afford downtime.

We tailor servicing recommendations for commercial customers based on actual usage patterns rather than applying a blanket annual schedule regardless of how hard the system works.

What happens if servicing is skipped

Skipping servicing doesn't usually cause an immediate failure, but small issues tend to build up unnoticed: filters clog gradually, drainage can develop partial blockages, and refrigerant charge or electrical connections can drift out of ideal condition over time.

These issues often show up eventually as reduced cooling performance, unusual noise, or in some cases a system that stops working altogether, typically at the least convenient time, such as during a heatwave.

Manufacturer warranty considerations

Many manufacturer warranties require evidence of regular servicing by a qualified engineer to remain valid. Skipping servicing can therefore affect warranty cover as well as day-to-day reliability, so it's worth checking the terms that apply to your specific system.

Setting up a sensible servicing schedule

For most households, booking an annual service ahead of the warmer months is a sensible default. For heavier-use homes, commercial premises, or systems used for heating through winter as well, we can advise on a schedule that better matches actual usage.