Air Con Servicing Cost UK
A professional air conditioning service costs £75–£150 per unit per visit in 2026, with domestic annual contracts running £150–£300. Here's exactly what a service includes, what you can safely do yourself, and why skipping it can cost you the warranty.
Servicing costs at a glance
| Service | Typical cost (2026) | Notes |
|---|---|---|
| One-off service, single unit | £75–£150 | Per indoor unit, per visit |
| Additional units, same visit | Lower per-unit rate | Travel and setup are shared, so ask for a multi-unit price |
| Domestic annual contract | £150–£300 /yr | Usually one or two visits plus priority call-out |
| Commercial planned maintenance | Quoted per site | Priced per unit and visit frequency; F-Gas leak checks and compliance records included |
Prices from UK installer and maintenance-provider quote data, 2026. Repairs are separate: call-outs typically £80–£150 plus parts.
What's in a professional service checklist
A proper service is more than a filter clean. A competent engineer will typically:
- Clean or replace filters and clean the indoor coil and casing
- Clean the outdoor unit coil and clear debris from around it
- Check refrigerant pressures and inspect for leaks (an F-Gas obligation — venting refrigerant is illegal)
- Test the condensate drain and pump, and treat against mould and bacteria
- Check electrical connections, terminals and current draw
- Verify temperatures across the coil to confirm the unit is performing to spec
- Test controls, sensors and modes (cooling, heating, dehumidify)
- For units run as winter heating, check the reversing valve and defrost cycle and confirm heating-mode output — increasingly important now that many Surrey homes run their splits year-round rather than for summer cooling alone
- Record the visit — the paper trail that keeps your manufacturer warranty valid
What you can do yourself — and what you can't
Safe DIY jobs: rinsing dust filters monthly in heavy use, wiping the indoor unit casing, keeping leaves and debris away from the outdoor unit, and checking nothing is blocking airflow. These keep efficiency up between visits and cost nothing.
Professional-only jobs: anything involving refrigerant — pressure checks, leak detection, re-gassing — is legally restricted to F-Gas certified engineers. Deep coil cleaning, electrical checks and condensate treatment are also best left to the pros. If a unit is losing performance, don't top up refrigerant: a leak must be found and fixed first, and re-gassing after repair typically costs £100–£300.
The warranty angle — why servicing pays for itself
Most manufacturer warranties — including the 5–7 year terms premium brands offer through accredited installers — require documented annual servicing to stay valid. Skip a year and a compressor failure that would have been a free warranty repair becomes a bill running to hundreds of pounds. Add the efficiency benefit (clean coils and correct refrigerant charge keep running costs at spec) and the mould/hygiene benefit, and the £75–£150 annual visit is one of the easier calls in home maintenance. For landlords and commercial operators, maintenance records also evidence duty-of-care and F-Gas compliance.
Frequently asked questions
Sources & methodology
- Service and contract pricing from UK installer and maintenance-provider quote data, 2026.
- Warranty-condition information from manufacturer published warranty terms.
- Refrigerant-handling requirements per UK F-Gas regulations, including mandatory leak checks for systems with a refrigerant charge of 5 tonnes CO2 equivalent or more.
Get servicing quotes from local engineers
Air Con Surrey is a free matching service — we'll match you with vetted, F-Gas certified engineers for one-off services or annual contracts, so you can compare prices in minutes.