A precise and efficient service call signed AirGreen
At AirGreen , every service is carried out with the same rigor: rapid diagnosis, lasting repairs, and guaranteed customer comfort. Recently, our team visited Sainte-Dorothée (Laval) for a service call regarding a Midea wall-mounted air conditioner experiencing performance issues.
Context of the intervention
The customer noticed that his outdoor unit, installed on a wall bracket between two closely spaced brick walls, was producing an abnormal noise and that the indoor temperature was no longer stabilizing properly. The unit—a 12,000 BTU Midea —was operating intermittently, with excessively short cycles and a noticeable loss of power.
The installation, typical of Laval 's residential areas, required special attention: the restricted space between buildings limited air circulation around the condenser. This factor could accentuate overheating and trigger the unit's thermal protections.
In-depth diagnosis
Our certified technicians performed a complete diagnosis of the HVAC system :
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Refrigerant pressure check : slight undercharge detected.
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Outdoor fan inspection : dust accumulation on the blades.
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Check electrical connections : a slightly loose contact on the main board.
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Airflow analysis : limited circulation due to the proximity of the two facade walls.
Repair Steps
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Complete cleaning of the condenser using a biodegradable product to improve heat exchange.
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Tightening and securing electrical connections , eliminating the risk of arcing and intermittent outages.
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Recharge with R410A refrigerant , bringing the pressure back to the values recommended by Midea.
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Wall mount check : we adjusted the tilt to optimize condensate drainage.
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Repositioning the power cable in an insulated sheath to avoid any contact with the wall exposed to the sun.
Final result
Upon restart, the unit returned to peak performance . The compressor operated stably, the airflow became regular again, and the noise level was significantly reduced. We advised the customer to schedule annual maintenance to prevent fouling of the condenser, particularly in areas where natural ventilation is limited.
AirGreen Tips for Close Wall Installations
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Leave at least 30 cm of space on each side of the condenser to allow good heat dissipation.
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Clean the internal and external filters at least twice per season.
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Have the refrigerant charge checked every two years by a qualified technician.
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Monitor vibrations : Slight misalignment of the mount can generate noise and reduce the life of the unit.
AirGreen expertise always at your service
This type of intervention perfectly illustrates our approach: precise diagnosis, lasting repair, and proactive prevention . At AirGreen, we understand the importance of a reliable HVAC system in the daily comfort of our customers in Laval, Montreal, Longueuil, on the North Shore and the South Shore .
Our priority: to offer a high level of technical service while guaranteeing peace of mind for our customers.