When Neglected Maintenance Leads to a Critical Service Call
At AirGreen , we often receive calls from customers surprised to notice a sudden drop in the performance of their wall-mounted air conditioner . This is exactly what happened recently in Sainte-Dorothée (Laval) , where a customer noticed that his Midea heat pump was no longer blowing cold air, despite an indicator light indicating its operation.
When I opened the cover of the indoor unit, the problem was immediately obvious: the air filters and the evaporator were saturated with dust . This is typical of maintenance that is too infrequent, which affects performance and increases energy consumption.
Complete HVAC System Diagnostics
Our certified technicians carried out a thorough diagnosis of the unit:
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Filter inspection : completely clogged, preventing normal airflow.
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Evaporator condition : Visible accumulation of fine dust on the fins.
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Condensate drain : partially blocked, causing slight water overflow.
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Check temperature sensor : dirty, causing incorrect ambient temperature reading.
These are typical signs of neglected annual maintenance . Even Midea appliances, renowned for their reliability, require regular cleaning to maintain their efficiency.
Intervention: cleaning and return to service
The intervention was carried out in three main stages:
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Deep cleaning of air filters : complete washing with biodegradable disinfectant solution.
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Degreasing and rinsing the evaporator : application of a specialized foaming cleaner to dissolve residue without damaging the fins.
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Cleaning the condensate drain and completely purging the pipe to prevent any future overflow.
Our technicians also checked the blowing temperature after restarting: the air went from 26°C to 10°C , a sign of restored performance.
Result: restored comfort and optimized efficiency
Once the cleaning was complete, the Midea heat pump regained its full cooling capacity. The customer immediately noticed a difference in airflow speed and the coolness felt in the room.
We have also scheduled an automatic reminder for the next preventive maintenance , to avoid any relapse. This maintenance will include:
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Cleaning the coils .
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Checking the refrigerant level .
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Testing the sensors and fan .
AirGreen Tips to Extend the Life of Your Wall-Mounted Air Conditioner
Although Midea air conditioners are designed to last, regular maintenance is crucial:
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Clean the filters every two to three months during the warm season.
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Make sure nothing is blocking the air outlet (curtains, furniture, etc.).
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Have your unit inspected annually by a qualified technician.
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In case of unusual noise, drop in performance or water leak , contact a professional quickly before the problem gets worse.
Why choose AirGreen in Laval and Greater Montreal?
By entrusting your HVAC system to AirGreen , you benefit from:
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From a certified and experienced team in all brands (Midea, Fujitsu, Gree, Sharp, Trane, etc.).
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Fast home service , covering Montreal, Laval, Longueuil, the North Shore and the South Shore .
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An honest diagnosis , without forced sales or hidden costs.
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Personalized monitoring to maximize the longevity of your device.
Thanks to our preventive maintenance interventions , several customers in Laval have noticed a 15 to 25% reduction in their energy consumption and better temperature stability in their homes.
In summary
This case in Sainte-Dorothée illustrates the importance of regular HVAC maintenance . A simple cleaning can transform a sluggish unit into a high-performance, quiet, and energy-efficient system.
At AirGreen, we believe that a well-maintained device means lasting comfort and guaranteed peace of mind .