When dirt becomes the main cause of poor performance
At AirGreen , we often receive calls from customers surprised to discover that their Midea wall-mounted air conditioner is no longer cooling as efficiently as it used to. This case of an intervention in Outremont perfectly illustrates how a simple lack of maintenance can seriously affect the performance of an HVAC unit.
The diagnosis: a completely clogged filter
Our technician visited a typical Outremont apartment during a particularly hot summer. As soon as he opened the front panel of the indoor unit, the problem became apparent:
The air filters were saturated with dust and dirt , and mold was beginning to form on the internal chassis.
Result :
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The airflow was blocked ,
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The heat exchange between the ambient air and the evaporator was almost zero,
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The compressor was running at overspeed , which increased power consumption,
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And the room was no longer cooling down despite the maximum setting.
Thorough inspection and complete cleaning
After isolating the unit and turning off the power, we carried out a complete inspection of the wall unit :
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Remove filters and clean with warm water and mild soap ;
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Applying an antibacterial disinfectant to the evaporator coil to eliminate mold spores;
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Suction of the blower turbine (the “roller”) , often neglected and responsible for bad odors;
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Checking the condensate drainage to ensure that no obstructions are causing overflow;
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Testing the temperature sensor and shutter motor operation .
Additional repair: refurbishment of seals
During disassembly, our team noticed that the insulating foam seals at the base of the hood were damaged. These seals, although harmless, play a crucial role in proper air circulation . We replaced them with new Midea-certified seals , ensuring a better seal and limiting sound vibrations.
Results: efficiency and comfort restored
Once the system was reassembled, a complete test was carried out:
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Blowing temperature measured at 7°C ,
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Air flow returned to constant,
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Operating noise reduced by 30%,
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No condensate leak detected.
The customer immediately noticed that the temperature in his room dropped much faster and that the air conditioner felt “like new.”
Maintenance advice given to the customer
To prevent this type of situation from happening again, we recommended to the client:
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Clean the filters every 3 to 4 weeks during the summer season.
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To have a complete professional interview at least once a year.
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Avoid leaving the cooling mode running continuously without a break during very hot weather.
Regular maintenance not only ensures comfort, but also extends the life of the compressor and reduces energy consumption by up to 20%.
Why choose AirGreen for the maintenance of your Midea wall-mounted air conditioner?
We are specialists in residential and commercial HVAC systems throughout Greater Montreal , including Montreal, Laval, Longueuil, the North Shore and the South Shore .
Our expertise covers all major brands: Midea, Fujitsu, Gree, Daikin, Sharp, LG, Trane, Goodman and many others.
Each intervention is carried out with care, according to manufacturers' standards and Quebec public health standards.
In summary
This intervention demonstrates that simple neglected maintenance can cause an apparent breakdown, while a complete and professional cleaning is often enough to restore the device to its full performance.
At AirGreen , we believe that a rigorous and preventative approach to HVAC service is the key to lasting comfort and optimal energy efficiency.
AirGreen Air Conditioning & Heating – HVAC Experts in Montreal and surrounding areas.
Cleaning, repair, installation and maintenance of wall-mounted air conditioners and heat pumps.