An outdoor heat pump refurbished thanks to a complete cleaning by AirGreen
At AirGreen , we often encounter outdoor units of wall-mounted heat pumps that, after several seasons of exposure to the elements, lose their efficiency. This was the case during a service call in Boisbriand , on the North Shore , where a client contacted us for a complete preventative maintenance check of their GREE wall-mounted heat pump .
Initial diagnosis: accumulation of dirt and decreased efficiency
Upon arrival, we observed that the GREE brand outdoor unit was covered with a thin layer of dust, pollen, and environmental deposits typical of a device exposed to the open air. The fan blades also showed traces of grease and soot , which hindered smooth rotation.
The signs observed were clear:
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Reduced ventilation , causing less efficient heat exchange;
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Increased noise during operation;
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Shell partially obstructed , limiting airflow through the condenser;
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And a risk of compressor overheating in the medium term.
Intervention: professional cleaning and adherence to manufacturer's standards
For this type of GREE wall-mounted heat pump, our team followed a rigorous, step-by-step protocol:
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Power outage and securing of the work area;
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Protection of the brick wall and surrounding elements to prevent splashing;
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Application of a biodegradable cleaning product , specially designed for aluminum coils, to dislodge dirt without damaging the metal;
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Clean the fan blades by hand, using a soft brush and a microfiber cloth to remove fine dust;
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Low-pressure rinsing with warm water ensures uniform cleaning without damaging the condenser fins;
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Check the wall mount and fixings to ensure the stability of the device;
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Final inspection of electrical wiring and refrigeration fittings , to prevent any leaks or premature corrosion.
Each step was carried out according to the recommendations of the manufacturer GREE , thus guaranteeing the durability of the compressor and the energy performance of the unit.
Result: restored efficiency and quiet operation
After complete drying and restarting the heat pump, the customer immediately noticed the difference:
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More constant and powerful airflow ;
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Significant reduction in fan noise ;
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Faster cooling of interior rooms;
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And optimized energy consumption , thanks to a return to optimal heat exchange.
Our final inspection confirmed that the discharge temperature had decreased by more than 4°C compared to the initial values, a concrete sign of improved system performance.
Why regularly clean your outdoor heat pump
A dirty outdoor unit acts like a blocked filter: it forces the compressor to work harder to reach the desired temperature. This mechanical stress leads to increased electricity consumption , premature wear and tear , and ultimately, costly breakdowns .
At AirGreen, we recommend a complete cleaning of the heat pump at least once a year, ideally in the spring, to:
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Remove accumulated dust, salt and pollutants;
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Preserve cooling and heating capacity;
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Reduce the risk of breakdowns during periods of high usage;
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And maintain quiet and stable operation throughout the year.
AirGreen's expertise: professional maintenance throughout the North Shore and beyond
From Boisbriand to Terrebonne , via Laval and Montreal , our AirGreen technicians service all brands of wall-mounted and central heat pumps .
We use only environmentally friendly products and specialized tools , ensuring a thorough cleaning without compromising the integrity of the system.
Entrusting your HVAC maintenance to AirGreen means choosing a precise, respectful and sustainable service, designed to improve indoor comfort while extending the useful life of your GREE appliance or any other brand.