A water leak indicating a clogged drain
A Boisbriand homeowner recently contacted us after noticing water dripping down the wall beneath their Gree wall-mounted air conditioner . This type of problem is common during hot and humid periods, when condensation forms abundantly in the indoor unit. However, visible water flow is always a sign of a partially blocked drain or improperly positioned condensate tray .
At AirGreen , we know that these incidents, often seemingly benign, can cause significant damage if they are not treated quickly: deterioration of the plaster, traces of humidity, or even infiltration into the structure.
Initial inspection: locate the cause of the overflow
Our technician began by removing the top cover of the air conditioner to access the evaporator coil. He immediately noticed:
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a buildup of dust and mold on the filter and fins;
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a drainage pipe partially blocked by dust and algae residue;
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an overflow of the condensate tray , responsible for the flow on the wall.
The rest of the system, including the electronic board and sensors, showed no damage.
Technical intervention: cleaning and complete readjustment
The AirGreen team carried out a complete system upgrade :
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Vacuum and deep clean the evaporator coil using a biodegradable cleaner.
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Unblocking the drain using a pneumatic blowout tool and thoroughly flushing the pipe.
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Application of a fungicide treatment to prevent the formation of biofilm.
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Readjustment of the condensate tray level to ensure a correct slope towards the drain outlet.
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Extended condensation test , simulating a hot day, to check for proper drainage.
After these steps, the water flow was stable and perfectly directed outwards, without leaks.
Result: restored comfort, without traces or odors
Thanks to the quick intervention, the customer was able to avoid more costly wall damage and restore a healthy environment. Their Gree wall-mounted air conditioner is now operating at full capacity, with improved air circulation and reduced noise levels after cleaning.
AirGreen Maintenance Tips
To prevent condensation and drainage problems, our technicians recommend:
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to clean the air filters every two weeks during the summer;
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to have the condensate drain checked once a year, before the hot season;
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to avoid excessively reducing the interior temperature , as this increases the formation of condensation;
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and schedule annual HVAC maintenance to ensure optimal performance of the compressor and inverter module.
Local expertise, fast service
At AirGreen , we work daily on Gree wall-mounted air conditioners and heat pumps throughout Montreal, Laval, Longueuil, the North Shore and the South Shore . Each repair is carried out with the same rigor: precise diagnosis, original parts and attention to detail.
A satisfied customer and a preserved wall
At the end of the work, the wall was dried and cleaned, leaving no traces. The relieved client praised the speed and cleanliness of our service —another example of our commitment to providing reliable and durable HVAC solutions in the Boisbriand region.