Air Conditioning Servicing: What's Included and How Often You Need It

Maintenance Guide 2026

Air Conditioning Servicing

Air conditioning units work hard, especially over summer, and like any mechanical system they need regular servicing to keep running efficiently. Here's what a proper service involves, how often you need one, and what happens if you skip it.

Why Air Conditioning Needs Servicing

Dust, dirt and general wear build up inside a unit over time, even with light use. Left unchecked, this reduces cooling performance, pushes running costs up, and puts extra strain on components that eventually leads to breakdowns. A yearly service catches these issues early, before they turn into a bigger repair bill.

What's Included in a Service

• Filter cleaning or replacement to maintain airflow and air quality
• Refrigerant level checks to keep cooling performance at its best
• Condensate drain clearing to prevent leaks and water damage
• Full inspection of both indoor and outdoor unit components
• Electrical connection and safety checks
• A performance test before the engineer leaves

How Often Should It Be Serviced?

Once a year is recommended for most residential systems, ideally booked before summer when the unit works hardest. Commercial or multi-unit systems, and units used more heavily throughout the year, sometimes benefit from twice-yearly servicing depending on usage.

What happens if you skip it: performance and efficiency decline gradually, running costs creep up, and small issues like a blocked drain or low refrigerant can develop into more expensive repairs. Most manufacturer warranties also require proof of regular servicing to stay valid.

Common Questions

Do you service systems you didn't install?

Yes, we service all major makes and models regardless of who carried out the original installation.

How long does a service take?

Most single-unit services take under an hour. Multi-unit or commercial systems take longer depending on the number of units and access.

Is servicing different from a repair?

Yes, a service is routine maintenance to keep the system running well and catch issues early. If something's already gone wrong, that's a repair rather than a standard service, though our engineers can usually diagnose and quote for repairs during a service visit if needed.

Our F-Gas qualified engineers service all makes and models across Dartford, Kent, Essex, Sussex and London. Find out more about our air conditioning servicing, or see our air conditioning installation and Dartford air conditioning pages if you're considering a new system.