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Outdoor unit of a serviced split air conditioner

Pre-season air conditioner maintenance: checklist before summer

YOİ Mühendislik technical team5 min readMaintenance and fault guideOctober 29, 2026
In shortHaving air conditioner maintenance done in spring, before the first hot days, both avoids waiting during the busy service period and solves problems such as low refrigerant, a clogged drain or a dirty coil that could appear on the first day of the season. At home, the filters are cleaned; during service, the coil, fan, drain, outdoor unit, refrigerant pressure and electrics are checked.

Why before the season?

What you can do at home

  1. Cut the power, open the front cover and remove the filters, wash them with lukewarm water and dry them in the shade.
  2. Remove leaves, bags and the winter cover from around the outdoor unit.
  3. Check the remote control battery.
  4. Run the air conditioner in cooling mode for 15-20 minutes and observe the supply air, the noise, and whether water comes out of the drain.

Detailed steps: how to clean and maintain an air conditioner.

Service maintenance list

CheckPurpose
Indoor unit coil and fan cleaningOdor, bacteria, airflow loss
Drain pan and linePreventing water leaks: air conditioner leaking water
Outdoor unit coil cleaningPreventing high pressure and excess consumption
Refrigerant pressure and temperature measurementRefrigerant shortage and leak detection
Electrical connections, current, capacitorPreventing start-up problems
Bracket, vibration pad, pipe insulationSafety and noise
Discharge temperature testVerifying performance after maintenance

Bulk maintenance for housing complexes, offices and hotels

Where there are many units, a unit inventory is prepared, maintenance days are planned by block or floor, and the measurement values of each unit are recorded. With an annual maintenance contract, maintenance dates can be fixed for the same period every year: annual maintenance contract. For VRF systems: VRF air conditioner maintenance.

Let us plan your maintenance before the season starts

Write the number and type of units and your address; we will give you a maintenance day and a quote for spring.

You can download our maintenance form and use it in your own records: air conditioner maintenance form. For maintenance frequency: how often should air conditioner maintenance be done.

Frequently asked questions

When is the best time for air conditioner maintenance?

In spring, before the summer season starts. If you also use the air conditioner for heating, a second check in autumn is recommended.

Is refrigerant charged during pre-season maintenance?

Refrigerant pressure is measured; if there is a shortage, a leak is looked for first, and then the refrigerant is topped up.

Can we have bulk maintenance done as a building management?

Yes. We plan by apartment and block and service all units on set days.

How long does maintenance take?

Service maintenance of a standard split air conditioner usually takes around an hour; it varies with the level of dirt and access.

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