As warmer days approach, your air conditioner becomes one of the most important appliances in your home or workplace. However, before you start using it daily, it's essential to make sure your air conditioning system is ready for intensive operation throughout the summer.

During autumn and winter, especially if the unit hasn't been used, dust and dirt can accumulate in the filters and internal components. Without proper maintenance, your air conditioner may cool less efficiently, consume more electricity, or develop unpleasant odors.

In this guide, we'll walk you through 7 simple steps to prepare your air conditioner for the summer season.

1. Clean the Air Conditioner Filters

Cleaning the filters is one of the most important steps in preparing your air conditioner for summer.

During operation, filters collect dust and other airborne particles. When they become dirty, airflow is restricted, and the unit may operate less efficiently.

How to clean your air conditioner filters properly:

1. Turn off the air conditioner and disconnect it from the power supply according to the manufacturer's instructions.

2. Carefully open the front cover of the indoor unit.

3. Remove the filters following the instructions for your specific model.

4. Remove dust with a vacuum cleaner or wash washable filters with lukewarm water.

5. Allow the filters to dry completely, away from direct sunlight and heat sources.

6. Reinstall the filters and close the front cover.

During the summer season, it's recommended to check the filters regularly, typically every two to four weeks, or more frequently if the environment is dusty or the air conditioner is used intensively.

Note: Not all filters are washable. Always check the manufacturer's recommendations before cleaning them with water.

2. Inspect the Indoor Unit

In addition to cleaning the filters, it's important to check the condition of the air conditioner's internal components.

Over time, dust and moisture can accumulate on the heat exchanger, fan, and other parts of the indoor unit.

These deposits may cause unpleasant odors, reduced airflow, and lower cooling efficiency.

If you notice visible dirt deep inside the unit or an unpleasant smell when turning it on, professional cleaning is recommended.

Avoid disassembling the indoor unit yourself or applying aggressive cleaning chemicals to sensitive components.

3. Check the Outdoor Unit

The outdoor unit plays an essential role in the cooling process by releasing heat into the outside air.

During winter, leaves, dust, and other debris may accumulate around it, restricting airflow.

Before the summer season begins, check whether:

• There is enough free space around the outdoor unit for proper air circulation.

• Leaves, branches, or other objects are blocking the ventilation openings.

• There is visible damage to the casing or mounting brackets.

• The unit produces unusual noises during operation.

Remove only easily accessible obstacles when the unit is turned off and it is safe to do so.

If the outdoor unit is installed at a height or in a difficult-to-reach location, leave the inspection and cleaning to a professional technician.

4. Test the Cooling Function Before Hot Weather Arrives

One of the most common mistakes is waiting until the first extremely hot days to turn on the air conditioner.

It's much better to check its operation a few weeks before the summer season begins.

How to check whether your air conditioner is cooling properly:

1. Turn on the unit and select cooling mode (COOL).

2. Set the temperature a few degrees below the current room temperature.

3. Wait a few minutes for the unit to begin cooling.

4. Check whether cooler air is coming from the indoor unit.

5. Pay attention to unusual noises, vibrations, or unpleasant odors.

If your air conditioner struggles to reach the desired temperature, produces weak airflow, or frequently shuts off, professional servicing may be necessary.

Keep in mind that poor cooling performance doesn't automatically mean the unit is low on refrigerant. Dirty filters, restricted airflow, or other technical issues may also be responsible.

5. Check the Condensate Drainage System

During cooling, your air conditioner removes some moisture from the indoor air, producing condensation that must be drained away from the indoor unit.

If the drainage system becomes blocked or damaged, water may begin leaking into the room.

Watch for the following warning signs:

• Water dripping from the indoor unit.

• Damp marks on the wall beneath the air conditioner.

• Unpleasant odors coming from the unit.

• Visible damage to the accessible section of the drain hose.

If you notice water leaking inside the room, turn off the air conditioner and contact a professional technician.

Thorough cleaning of the condensate drainage system is best left to a qualified professional.

6. Adjust Your Air Conditioner for Energy-Efficient Cooling

Setting the right temperature can make a significant difference in both comfort and electricity consumption.

For many people, a temperature between 24°C and 26°C (75°F–79°F) is a good starting point during summer, depending on personal preferences and indoor conditions.

For more efficient cooling, consider the following tips:

• Keep windows and doors closed while the air conditioner is running.

• Lower blinds or close curtains during the hottest part of the day.

• Use ECO mode if your air conditioner supports it.

• Direct airflow away from people to avoid uncomfortable drafts.

• Avoid unnecessarily setting the temperature extremely low.

If indoor humidity is high, reducing moisture levels can also improve comfort without significantly lowering the temperature.

7. Schedule Professional Air Conditioner Maintenance Before Summer

Although you can perform some basic maintenance tasks yourself, professional servicing is the best way to make sure your air conditioner is ready for intensive summer use.

Depending on the condition of the unit and the scope of the service, a qualified technician may perform:

• Thorough cleaning of filters and indoor components.

• Cleaning of the heat exchanger and fan.

• Inspection and cleaning of the condensate drainage system.

• Inspection of the outdoor unit.

• Testing of the air conditioner's basic functions and performance.

• Additional diagnostics if any irregularities are detected.

Spring is an ideal time to schedule maintenance, ensuring your air conditioner is ready before the hottest summer days arrive.

Common Mistakes to Avoid When Preparing Your Air Conditioner

When preparing an air conditioner for summer, many users make a few common mistakes.

Don't wait until your air conditioner stops cooling. Preventive maintenance can help identify potential problems before they lead to more serious failures.

Don't neglect filter cleaning. Even if your air conditioner appears to be working normally, dirty filters can reduce its efficiency.

Don't use harsh cleaning chemicals. Unsuitable cleaning products may damage sensitive components.

Don't attempt to refill refrigerant yourself. Refrigerant systems require specialized equipment and professional handling. A properly functioning system does not need regular refrigerant refills.

Don't ignore warning signs. Unusual noises, water leaks, and poor cooling performance are all reasons to have your air conditioner inspected by a professional.

Conclusion: Get Your Air Conditioner Ready Before the Heat Arrives

Preparing your air conditioner for the summer season doesn't have to be complicated, but it can make a significant difference in comfort, efficiency, and reliability.

Regular filter cleaning, inspecting the indoor and outdoor units, testing the cooling function, and scheduling professional maintenance will help ensure your air conditioner is ready for the hottest days of the year.

Don't wait for the first heatwave to check your air conditioner!

The team at KOLIBRI Servis in Prokuplje is here to help with air conditioner cleaning, maintenance, and repair services.

Schedule your air conditioner service on time and enjoy a comfortable indoor temperature all summer long!