Air Conditioning in Company Cars — When to Schedule a Pre‑Season Check?

Why a pre‑season A/C check is necessary

Air conditioning in fleet vehicles affects driver comfort and safety as well as the operational efficiency of the vehicles. Faults discovered during the season generate downtime and concentrated service requests.

It is recommended to carry out an inspection of the air‑conditioning system at least once a year, before the summer period — this is standard industry practice and allows repairs to be scheduled without time pressure.

• An annual pre‑season inspection reduces the risk of failures at peak demand.
• Early diagnostics improve availability of parts and workshop appointment slots.

Optimal timing — when to order the check

For moderate climates such as Poland, a practical inspection window is 4–6 weeks before the expected rise in temperatures — usually late April or May. This lead time allows for repairs, leak testing and any necessary parts matching without disrupting operations.

In warmer regions or with intensive use (e.g. delivery vehicles in urban traffic) it is worth scheduling checks even earlier. Staggering inspection dates across the fleet limits the risk of simultaneous downtime.

• Plan checks for 4–6 weeks before the season in the given region.
• Stagger service visits over time instead of sending the entire fleet at once.

What a pre‑season inspection should include — checklist

The basic set of diagnostic activities includes measuring performance, leak testing, inspection of mechanical components and replacement of filters. These actions provide a reliable picture of the system’s condition and indicate necessary repairs.

The list below is based on practices of parts manufacturers and workshops servicing fleets.

• Measurement of supplied air temperature (performance test).
• Pressure measurements and checking the refrigerant level.
• Leak detection (vacuum methods or electronic detectors).
• Inspection of the compressor and clutch (visual and functional).
• Inspection and cleaning of the condenser; check airflow.
• Replacement of the cabin filter according to the manufacturer’s recommendations.
• Inspection of the drying system/receiver‑drier and condensation drain.
• Check operation of controls and airflow circuits (A/C/recirculation functions).

Law, qualifications and refrigerant handling — fleet administrator obligations

Work involving recovery, topping up and handling of fluorinated refrigerant gases is subject to F‑gazy regulations. The workshop and personnel performing the service must hold appropriate certificates and maintain the required documentation.

New passenger cars are produced in compliance with the MAC directive and often use the R‑1234yf refrigerant. Before ordering parts and services, make sure which refrigerant is used in the vehicle — mixing or using the wrong refrigerant is prohibited and can damage the system.

• Commission service work to workshops authorised to work with F‑gazy.
• Do not top up refrigerant without prior diagnosis and repair of leaks.
• Maintain records of actions taken (certificates, quantities of recovered/added refrigerant).

Prioritizing vehicles in the fleet

Not all cars require the same urgency. Prioritization allows you to focus resources on vehicles with the greatest operational impact or the highest risk of failure.

Base priority criteria on vehicle age and mileage, intensity of use and reports from drivers.

• High priority: high‑mileage vehicles, older units, cars doing long routes or carrying passengers.
• Medium priority: vehicles with medium mileage and regular urban use.
• Low priority: new cars with low mileage and a recent A/C inspection.
• Take into account driver reports of reduced performance or unusual noises.

Practical organization, logistics and record keeping

Good logistical preparation minimizes downtime and administrative costs. Schedule appointments, check parts availability and choose workshops with F‑gazy certification.

A simple, regularly updated A/C record for each vehicle facilitates compliance audits and service budget planning.

• Stagger inspections over time to avoid a backlog of service orders.
• Maintain an A/C file: inspection date, result (e.g. supply air temperature), quantity of recovered/added refrigerant, detected leaks, repairs performed, service certificate.
• Verify the refrigerant type before service (R‑1234yf vs R‑134a) and the required parts.
• Work with workshops that provide documentation of refrigerant recovery and disposal.

Common mistakes and what to watch for

A fairly common mistake is treating refrigerant top‑ups as a permanent solution. Topping up without removing leaks masks the problem and can lead to further failures.

Avoid commissioning refrigerant‑related work to personnel without the required qualifications — this is a matter of regulatory compliance and business responsibility.

• Do not entrust recovery/top‑up of refrigerant to technicians without F‑gazy certificates.
• Do not buy parts or plan actions without confirming the refrigerant type in the vehicle.
• Document every A/C intervention in the vehicle file.

Summary

For a fleet, schedule an annual air‑conditioning inspection 4–6 weeks before the summer season, prioritize vehicles by age, mileage and driver reports, use workshops with F‑gazy qualifications and keep a simple A/C record for each vehicle. This approach minimizes downtime, helps ensure regulatory compliance and reduces the risk of costly failures at peak season.