Air Conditioning Leaking Water Indoors – Luxembourg Repair
Water dripping down the wall under the indoor unit is alarming but almost never a refrigerant problem. Cooling produces condensation, and that condensation has to get out — when it cannot, it comes over the edge of the tray instead.
The Usual Causes
• A blocked condensate drain: dust, biofilm or insects in the small pipe • A drain line with the wrong fall, or one that has sagged over time • A frozen coil melting all at once — usually a dirty filter or low refrigerant • A condensate pump that has failed on units without a gravity drain • A unit fitted slightly out of level so the tray drains the wrong way
What to Do Immediately
Switch the unit off and place a container or towel underneath. Running it while it leaks risks damaging the wall, the flooring and anything electrical below. Switching to fan-only mode stops the condensation forming while you wait for us.
How We Repair It
The tray and drain are cleared and flushed, the fall of the drain line is checked and corrected, the tray is disinfected to slow biofilm regrowth, and the filters and coil are cleaned. If a pump is fitted, it is tested under real load rather than by ear. Where a frozen coil was the cause, we also check airflow and refrigerant charge — otherwise the leak returns as soon as the weather warms up.
Preventing It
Condensate drains block gradually, which is why an annual service before the cooling season prevents nearly all of these call-outs. Cleaning the filters yourself every few weeks in summer is the other half of the answer.
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Which service do you actually need?
- Want to know what it costs first? Check current AC installation costs.
- Thinking about a system for your home or office? See our air conditioning specialists.
What Our Clients in Luxembourg Say
Real Google reviews from verified clients — 32 five-star ratings.
"Excellent service! Repairs completed in less than 2 hours, and a new AC unit installed in less than 24 hours. Highly recommend!"
Claudio L.
Google Review · Air Conditioning
"Great service, in two days he installed an air conditioning system with 3 split units and did everything very professionally."
Khan 804
Google Review · Air Conditioning
"I urgently needed an electrician because all the power in my house went out due to my mistake. I called MS Services who quickly reassured me they would come as soon as possible that day, which they did, and successfully restored power to my property. A1++ service."
Ian T.
Google Review · Electrical
"Excellent and fast service provided by an incredibly friendly and attentive employee."
Marx P.
Google Review · Electrical
"Very friendly contact! Quick repairs, even in emergencies! Warm recommendation!"
Eric R.
Google Review · Electrical
"Extremely fast electrical repair service in the evening hours. Very professional. I recommend them."
Luisa N.
Google Review · Electrical
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