Regular maintenance is the single most important thing you can do to protect your commercial air conditioning investment. Yet many UK businesses only call an engineer when something goes wrong — by which point, a minor issue has often become a costly repair or a full system replacement.
At AKS Air Conditioning, we’ve been maintaining commercial HVAC systems for over 34 years. In this guide, we cover everything you need to know about keeping your air conditioning running reliably, efficiently, and in full compliance with UK regulations.
Why Commercial Air Conditioning Maintenance Matters
A well-maintained air conditioning system doesn’t just keep your building comfortable — it directly affects your bottom line. Here’s why regular servicing is essential:
Energy efficiency: Dirty filters, low refrigerant, and worn components force your system to work harder. A poorly maintained unit can use 20–40% more energy than a serviced one, adding thousands to your annual electricity bill.
Equipment lifespan: Commercial AC systems represent a significant capital investment. With proper maintenance, a quality system from manufacturers like Daikin or Mitsubishi can last 15–20 years. Without it, you could be looking at premature replacement after just 7–10 years.
Fewer breakdowns: Emergency callouts are expensive and disruptive. Most breakdowns are caused by issues that would have been caught during a routine service — blocked drains, failing capacitors, or refrigerant leaks.
Air quality: Your AC system circulates air throughout your building. Dirty filters and contaminated coils can spread dust, allergens, and bacteria, affecting staff health and productivity. This is particularly important in hospitality and healthcare environments. Learn more about our air purification solutions.
Legal compliance: Under the F-Gas Regulations 2015, businesses operating systems containing fluorinated greenhouse gases must have them inspected by a certified engineer at specified intervals. Non-compliance can result in significant fines. Read more about F-Gas compliance requirements.
What Does a Commercial AC Service Include?
A comprehensive maintenance visit from AKS Air Conditioning covers the following checks and tasks:
Filters and Airflow
- Inspect and clean or replace all air filters
- Check airflow across indoor and outdoor units
- Clean evaporator and condenser coils
- Clear condensate drains and traps
Refrigerant System
- Check refrigerant charge and pressures
- Inspect for refrigerant leaks (F-Gas requirement)
- Log refrigerant data in your F-Gas record
- Test compressor operation and performance
Electrical Components
- Inspect all electrical connections and terminals
- Test capacitors, contactors, and relays
- Check control board operation
- Verify thermostat and sensor calibration
Mechanical Components
- Check fan motors, bearings, and belts
- Inspect mounting and vibration isolation
- Test reversing valves (heat pump systems)
- Check expansion valves and metering devices
How Often Should You Service Your Air Conditioning?
The recommended service frequency depends on your system type, usage, and the environment:
| System Type | Recommended Frequency | Notes |
|---|---|---|
| Split systems (light use) | Annually | Office environments with standard hours |
| Split systems (heavy use) | Twice yearly | Retail, hospitality, 24/7 operations |
| VRV/VRF multi-zone | Quarterly | Complex systems with multiple indoor units |
| Air handling units | Quarterly | Filter changes may be needed monthly in some environments |
| Close control / server rooms | Quarterly | Critical cooling — downtime is not an option |
For more information about ventilation and air handling, visit our dedicated page.
F-Gas Compliance: Your Legal Obligations
If your air conditioning system uses HFC refrigerants (which most do), you have legal obligations under the F-Gas Regulations:
- Systems containing 5 tonnes CO₂ equivalent or more must be leak-checked at least every 12 months
- Systems containing 50 tonnes CO₂ equivalent or more must be checked every 6 months (or quarterly without a leak detection system)
- All checks must be carried out by an F-Gas certified engineer
- You must maintain an F-Gas logbook recording all refrigerant additions, recoveries, and leak checks
AKS engineers hold full F-Gas certification, and we maintain your logbook as part of every service visit.
The Benefits of a Maintenance Contract
Rather than booking one-off service calls, many of our clients choose a planned maintenance contract. The advantages include:
- Priority response: Contract customers receive priority emergency callouts, typically within 4 hours
- Fixed costs: Spread your maintenance costs across the year with predictable monthly or quarterly payments
- Compliance included: All F-Gas checks and record-keeping are built into the contract
- Extended warranties: Many manufacturers, including Daikin, require evidence of regular maintenance to honour warranty claims
- Reduced downtime: Planned maintenance is scheduled around your business hours to minimise disruption
Daikin and Mitsubishi Servicing Specialists
As an authorised Daikin D1+ partner, AKS Air Conditioning has factory-trained engineers who specialise in servicing the full range of Daikin commercial systems — including VRV IV and VRV 5, Sky Air, and air handling units. We also service Mitsubishi Electric, Fujitsu, Toshiba, and all other major brands.
Our engineers have access to genuine manufacturer parts and the latest diagnostic software, ensuring your system is serviced to the highest possible standard.
Warning Signs Your AC Needs Attention
Don’t wait for a complete breakdown. Contact us if you notice any of these warning signs:
- Unusual noises — rattling, grinding, or squealing
- Reduced cooling or heating performance
- Unpleasant odours when the system is running
- Water leaks or excessive condensation
- Higher than expected energy bills
- Error codes or warning lights on the controller
- Inconsistent temperatures between zones
Book Your Maintenance Today
Whether you need a one-off service or a comprehensive maintenance contract, AKS Air Conditioning has you covered. With over 34 years of experience and F-Gas certified engineers, we keep commercial air conditioning systems running at their best across the North West and beyond.
Call us on 01704 833 755 or get in touch online to discuss your maintenance requirements.
