When neglected maintenance leads to a breakdown: AirGreen intervention in Outremont
At AirGreen , we frequently receive calls about Gree wall-mounted air conditioner breakdowns caused by a lack of maintenance. This is exactly the case for this customer in Outremont , who contacted us after noticing that his wall-mounted unit was no longer cooling as well as before and was giving off a slight musty odor.
Initial diagnosis: clogged filters and water flow
Upon arrival, we inspected the indoor unit (photo above). The air filters were heavily clogged , blocking airflow and forcing the unit to operate at maximum power without any real efficiency. In addition, water dripping on the wall under the unit indicated a condensate drainage problem.
Step 1: Opening and complete inspection
Our technicians removed the front hood and observed:
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Filters saturated with dust and fine particles ;
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Dirty evaporator coils , covered with a thin sticky layer;
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A blocked drainage gutter , preventing water from draining properly;
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Some mold stains inside the crankcase.
This combination of factors explained not only the drop in performance , but also the poor air quality experienced by the customer.
Step 2: Deep Clean the Unit
We carried out a complete cleaning according to the AirGreen protocol:
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Removing and washing the air filters with warm water and neutral soap.
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Cleaning the evaporator coils with a biodegradable solution approved for Gree systems.
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Clearing and flushing the drainage pipe , clogged with a mixture of dust and algae.
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Antibacterial disinfection of the condensate tank and internal housing.
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Reinstallation and complete testing of the unit.
After restarting, the airflow improved significantly, and the condensed water drained normally outside.
Step 3: Checking the refrigeration circuit
To ensure the overall system was functioning properly, we then checked the R-32 refrigerant pressure and found it to be stable, ruling out any gas leaks. The outdoor compressor, which had already been serviced by our team the previous year, was operating without any issues.
Result: restored performance and purified air
At the end of our intervention, the interior temperature dropped quickly and the air diffused was fresh, odorless. The client was pleasantly surprised by the difference - his system, which had seemed "tired," was back to full efficiency.
AirGreen tips to avoid this type of breakdown
To prevent this scenario from happening again, we have shared some essential tips:
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Clean the filters every 4 to 6 weeks during the summer season.
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Have a complete maintenance carried out by a professional at least once a year , before the hot period.
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Watch for signs of moisture around the unit, which is often indicative of a drainage problem.
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Avoid using “Dry” mode continuously, which unnecessarily overloads the system.
Simple annual preventative maintenance can extend the life of a wall-mounted air conditioner by several years.
Why choose AirGreen for the maintenance and repair of your Gree wall-mounted air conditioner in Outremont?
At AirGreen , we combine technical expertise with attention to detail. All our technicians are certified and trained on Gree, Fujitsu, Midea, Sharp, Hitachi equipment and more . We operate throughout Montreal, Laval, Longueuil, the North Shore and the South Shore .
Our advantages:
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Precise diagnosis on site , without guesswork or additional costs.
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Guaranteed original manufacturer parts .
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Fast service , often the same day.
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Eco-friendly cleaning without harsh chemicals.
AirGreen, your long-term comfort partner
Air conditioning is a key element of modern comfort, especially during Montreal's heat waves. Neglected maintenance can cause not only costly breakdowns , but also health problems related to indoor air quality.
Through our rigorous interventions and preventative approach, we help each client protect their investment and enjoy lasting comfort throughout the year.
At AirGreen , we don't just repair: we bring your HVAC systems back to life .