An outdoor heat pump exposed to the elements
During this service call in Brossard , our AirGreen team was asked to perform a complete cleaning of a wall-mounted heat pump installed on an apartment balcony. The unit, although relatively new, showed clear signs of dirt and grime : dust accumulated on the fins, dark deposits on the heat exchanger, and some debris stuck at the base of the condenser. These conditions, often invisible to the naked eye from inside, directly impair the efficiency of the HVAC system.
Symptoms observed before cleaning
The client complained of several recurring problems:
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Reduced airflow inside despite being set to full power.
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A louder air noise coming from the outdoor unit.
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Difficulty maintaining the desired temperature , especially in air conditioning mode.
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And a light frost visible on the fins on humid mornings.
These symptoms indicated poor air circulation through the heat exchanger, typical of an accumulation of dust and pollutants.
The AirGreen approach: a rigorous and safe method
1. Visual inspection and securing of the site
On this narrow balcony, the first step was to protect the floor and walls to prevent any splashes. We then checked the condition of the refrigeration and electrical connections, as well as the stability of the unit.
2. Application of a biodegradable detergent
We sprayed a non-corrosive, biodegradable cleaner over the entire surface of the condenser. This environmentally friendly product effectively dissolves dust, grease, and microorganisms, while respecting the materials of the heat pump.
3. Low-pressure water jet rinse
After a few minutes of operation, a controlled, low-pressure rinse removed the accumulated dirt from the fins without risking bending them. This step is essential to restore airflow and optimal system energy efficiency.
4. Cleaning the grilles and the housing
The air intake and exhaust grilles were removed and then thoroughly washed. We also cleaned the external casing , which is often neglected but accumulates dust and attracts moisture, promoting long-term corrosion.
5. Drainage check
A drainage test confirmed that the drain pipe was not blocked , ensuring proper drainage of condensation — a critical point to prevent the formation of mold and bad odors.
6. Final test and performance validation
Once the unit was reinstalled, we restarted the heat pump for a complete performance test : airflow, outlet temperature, refrigerant pressure, and noise level. All parameters returned to normal, with a clear improvement in energy efficiency .
Results after the intervention
The positive effects were immediate:
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The airflow has become strong and steady again .
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The fan noise has decreased significantly .
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The system has returned to an optimal blowing temperature , without frost or overheating.
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The customer noticed increased comfort and improved responsiveness of their heat pump from day one.
The importance of regular cleaning
This type of service demonstrates how essential annual professional maintenance is for maintaining the performance of a heat pump. At AirGreen , we serve the entire Greater Montreal area, Laval, Longueuil, the North Shore, and the South Shore , using safe techniques and environmentally friendly products.
A complete HVAC cleaning allows you to:
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Improve air quality by eliminating dust and mold.
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Reduce energy consumption by up to 20%.
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Prevent costly compressor and fan breakdowns .
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Extend the lifespan of your equipment.
Our commitment: to offer each customer a professional, meticulous and sustainable service, true to AirGreen 's reputation for excellence.