Domakihub How to Service Your Air Conditioner and Keep It Running Efficiently
A step-by-step home maintenance guide for split and portable AC units in Greek homes, rentals, and hotels.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 5 min read
In Greece, air conditioners work harder than almost anywhere else in Europe — running through summer heat waves that can exceed 40°C and, increasingly, through mild winters as well. Regular servicing keeps the unit efficient, extends its lifespan, and avoids the expensive emergency call-outs that tend to arrive right when you need cool air most. The video above walks through the full service process on a real home unit; this article breaks it into clear steps you can follow yourself or use to brief a technician.
Why Annual Servicing Is Not Optional in Greece
Greek summers are long and brutal. An AC that runs eight or more hours a day from May through October accumulates dust, mould spores, and mineral deposits at a far higher rate than units in cooler climates. Neglected filters alone can reduce cooling capacity by 20–30%, meaning the compressor works harder, electricity bills rise, and parts wear out faster.
Holiday rentals and small hotels face an additional risk: a unit that breaks down mid-stay generates refund requests and bad reviews. Servicing once a year — ideally in April before the season starts — is simple insurance.
Split AC vs Portable: What the Service Covers
The vast majority of Greek homes and rentals use wall-mounted split systems. These have two parts: an indoor air-handling unit and an outdoor compressor. Both need attention. The indoor unit collects dust on its filters and evaporator coil; the outdoor unit accumulates debris on the condenser fins and needs clear airflow around it.
Portable or window units are simpler — one box, one or two washable filters — but the same principles apply: clean filters, clear coils, and confirmed drainage.
5 Steps to Service Your Air Conditioner
- 1
Clean or replace the indoor filters
Switch the unit off and remove the front panel. Slide out the mesh filters — most split AC filters are reusable. Rinse them under lukewarm water, let them dry completely in shade (never in direct sun, which can warp plastic), and refit before switching back on. Do this every four to six weeks during heavy use and at the start of every season.
- 2
Clean the evaporator coil and fan blades
With the filters removed, you can see the aluminium evaporator fins behind them. Use a soft brush or a can of compressed air to remove dust build-up. For mould or greasy deposits, an AC coil cleaner spray (widely available in Greek hardware stores) does the job — follow the product instructions and let it drain into the drip tray below before reassembling. Wipe the fan blades with a damp cloth while you have access.
- 3
Clear and flush the condensate drain
The condensate drain carries moisture out of the indoor unit, usually through a small pipe that exits through the wall. A blocked drain causes water to drip from the unit into the room — one of the most common AC complaints in Greek rentals. Locate the drain outlet, confirm water flows freely by pouring a cup of water into the drip tray, and use a thin flexible brush or a pump to clear any blockage.
- 4
Inspect and clean the outdoor condenser unit
Turn off power at the circuit breaker before working outside. Remove any leaves, seed pods, or debris packed against the condenser fins. Use a garden hose on a gentle spray setting to wash the fins from the inside outward — this pushes dirt out rather than compacting it further. Check that at least half a metre of clear space surrounds the unit; objects stacked against it trap heat and destroy efficiency. Look for bent fins and carefully straighten them with a fin comb if needed.
- 5
Check refrigerant levels and book a professional top-up if needed
Refrigerant level is the one thing that cannot be checked with the naked eye but shows clear symptoms: the unit blows air that never gets properly cold, ice forms on the indoor copper pipes, or the outdoor compressor runs almost continuously. Refrigerant top-ups require a certified technician in Greece (EU F-Gas regulations apply). If you notice these signs after completing steps 1–4, book a service call before the peak summer rush in June.
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FAQ
- How often should an air conditioner be serviced in Greece?
- Once a year is the minimum — ideally every April before the summer season starts. Units in dusty environments, coastal areas with salt air, or properties rented out continuously should be checked every six months. Filter cleaning alone should happen every four to six weeks during heavy use.
- Can I service my split AC myself, or do I need a technician?
- The cleaning steps — filters, coil, fan, drain, and condenser — can all be done safely by a careful homeowner using basic tools and commercial AC cleaning sprays. However, refrigerant handling, electrical wiring checks, and any warranty-related work must be carried out by a licensed HVAC technician. A full professional service typically costs €50–€120 per unit in Greece.
- What happens if I never service my air conditioner?
- Blocked filters and dirty coils force the compressor to work far harder than it was designed to. Over two to three seasons of neglect, you can expect 20–40% higher electricity consumption, frequent short-cycling (the unit switching on and off rapidly), ice forming on the indoor pipes, water leaks into the room, and ultimately early compressor failure — which can cost as much as a brand-new unit to replace.