Air Conditioning Maintenance in the Algarve: What to Do Before the Summer Peak

Get your air conditioning ready before peak summer in the Algarve. Filter cleaning, warning signs and when to call a technician. Free technical visit.
Published on
June 12th, 2026

Air Conditioning Maintenance in the Algarve: What to Do Before Peak SummerHow much does it cost to install Air Conditioning in the Algarve?

With summer approaching, now is the time to prepare your air conditioner – not in August, when it fails on the hottest day of the year. In this guide, we explain what you can do yourself, what should be left to a technician, and the signs that your equipment needs attention.If you're considering installing air conditioning in your house or apartment in the Algarve, one of the first questions is inevitable: how much will it cost? The honest answer is: it depends. But in this article, we explain all the factors that influence the price, so you can get a quote without surprises.

In summary: air conditioning maintenance should be done at least once a year, ideally before summer. It includes filter cleaning (which you can do at home) and a professional technical review – checking gas, drainage, and electrical components. Well-maintained equipment consumes less energy and can last 15 to 20 years.In summary: air conditioning maintenance should be performed at least once a year, ideally before summer. It includes filter cleaning (which you can do at home) and a professional technical review – gas check, drainage, and electrical components. Well-maintained equipment consumes less energy and can last 15 to 20 years.

Why is maintenance so important in the Algarve?Why is maintenance so important in the Algarve?

In the Algarve, air conditioning works harder than in any other region of the country. Between June and September, many units operate for several hours a day, every day. Added to this is the proximity to the sea – the air's salinity accelerates the wear and tear on outdoor units.In the Algarve, air conditioning works harder than in any other region of the country. Between June and September, many units operate for several hours a day, every day. Added to this is the proximity to the sea – the air's salinity accelerates the wear and tear on outdoor units.

An unmaintained unit consumes more energy to produce the same cooling, loses cooling capacity, and is more likely to break down precisely when you need it most. Unmaintained equipment consumes more energy to produce the same cooling, loses cooling capacity, and is more likely to break down precisely when you need it most.

Conversely, a well-maintained system retains efficiency, protects indoor air quality, and can last 15 to 20 years.Conversely, a well-maintained system retains efficiency, protects indoor air quality, and can last 15 to 20 years.


What you can do yourself
What you can do yourself

1. Clean the indoor unit filters1. Clean the indoor unit filters

This is the simplest task and the one with the most impact. Dirty filters force the unit to work harder and degrade air quality.This is the simplest task and the one with the most impact. Dirty filters force the unit to work harder and worsen air quality.

Open the front cover of the indoor unit, remove the filters, wash them with lukewarm water, let them dry completely in the shade, and then put them back. During summer, it's ideal to repeat this every 3 to 4 weeks.Open the front cover of the indoor unit, remove the filters, wash them with lukewarm water, let them dry completely in the shade, and then put them back. During the summer, it's ideal to repeat this every 3 to 4 weeks.

2. Check the outdoor unit2. Check the outdoor unit

Ensure the outdoor unit is not obstructed by leaves, dust, or objects. It should have clear space around it for air circulation. Do not attempt to open or wash the interior – that's a job for a technician.Ensure the outdoor unit is not obstructed by leaves, dust, or objects. It should have clear space around it for air circulation. Do not attempt to open or wash the interior – that is a job for a technician.

3. Run a test before the heat arrives3. Run a test before the heat arrives

Turn on the unit in cooling mode for 20 to 30 minutes on a mild day. If you notice any of the warning signs below, contact a technician before peak season – in July and August, service schedules fill up quickly.Turn on the unit in cooling mode for 20 to 30 minutes on a mild day. If you notice any of the warning signs below, contact a technician before peak season – in July and August, service schedules fill up quickly.

What a technician should handleWhat a technician should handle

Some checks require specialized tools, training, and certification:Some checks require tools, training, and certification:

  • Refrigerant charge check and leak detection
  • Deep cleaning of indoor and outdoor coils (heat exchangers)
  • Condensate drainage check
  • Inspection of electrical connections and components
  • Measurement of operating pressures and temperatures

The handling of refrigerant gases is regulated and can only be performed by certified technicians. An incorrect gas charge reduces efficiency and can damage the compressor – the most expensive part of the unit.Handling refrigerant gases is regulated and can only be done by certified technicians. An incorrect gas charge reduces performance and can damage the compressor – the most expensive part of the equipment.

Signs that your air conditioner needs attentionSigns Your Air Conditioner Needs Attention

  • It cools less than before or takes longer to reach the desired temperature
  • It makes unusual noises (humming, clicking, vibration)
  • It emits a musty or damp smell when turned on
  • Water drips from the indoor unit
  • The electricity bill has risen without explanation
  • Ice forms on the pipes or outdoor unit

If you recognize any of these signs, don't wait for the problem to worsen. Timely intervention is almost always simpler and more economical than an emergency repair in the middle of August.If you recognize any of these signs, don't wait for the problem to worsen.

How often should you have professional maintenance?How often should you get professional maintenance?

For a home in the Algarve with intensive summer use, we recommend one technical inspection per year, ideally in spring. For tourist rental properties, where the unit operates almost continuously during peak season, two annual inspections are ideal – one before and one after summer.


For a home in the Algarve with intensive summer use, we recommend one technical inspection per year, ideally in spring. For tourist rental properties, where the equipment operates almost continuously during peak season, two annual inspections are ideal – one before and one after summer.

What if the unit is already old?What if your unit is already old?

A well-maintained air conditioner can last 15 to 20 years. However, if your unit is more than 12-15 years old, consumes a lot of energy, and requires frequent repairs, it might be worthwhile to replace it with a newer model – brands like Daikin, Mitsubishi Electric, or Midea now offer much higher energy efficiencies.A well-maintained air conditioner can last 15 to 20 years. However, if your unit is over 12-15 years old, consumes a lot of energy, and requires frequent repairs, it might be worthwhile to replace it with a newer model – brands like Daikin, Mitsubishi Electric, or Midea now offer significantly higher energy efficiencies.

If you have any doubts, our technician will assess your system's condition during the visit and advise you transparently: whether to maintain or replace it.If you're unsure, our technician will assess your system's condition during the visit and advise you transparently: whether to keep or replace it.

Termocelsius provides air conditioning maintenance and technical assistance in Termocelsius provides air conditioning maintenance and technical assistance in Vilamoura, Quarteira, Olhão, Loulé, Almancil, Quinta do Lago, Vale do Lobo, Albufeira, and FaroVilamoura, Quarteira, Olhão, Loulé, Almancil, Quinta do Lago, Vale do Lobo, Albufeira, and Faro. Schedule your service before the summer peak – we respond in less than 24 hours.. Schedule your service before the summer peak – response in less than 24 hours.

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