An essential maintenance step to regain performance and efficiency
At AirGreen , we were recently called in to perform a complete cleaning of a Fujitsu wall-mounted heat pump installed on the balcony of an apartment in Sainte-Dorothée, Laval . This unit, exposed to the elements and outdoor dust, was showing signs of reduced efficiency and visible minor soiling on the top of the casing. Our client also noticed that the heat pump was taking longer to reach the desired temperature, a typical indicator of a system requiring thorough maintenance.
Initial state and diagnosis
Upon our inspection, we observed:
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The fins of the outdoor unit were covered with dust and atmospheric deposits .
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A buildup of dirt on the top grille , reducing airflow.
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Residue in the fan area , which could compromise airflow and force the compressor to work harder.
The unit's interior appeared clean at first glance, but a light layer of dust had also accumulated on the heat exchanger. This type of gradual fouling, while seemingly minor, can reduce energy efficiency by more than 10%.
Fujitsu Heat Pump Cleaning Steps
Our team conducted a comprehensive three-stage interview :
1. Preparation and safety
Before starting any work, we shut off the power at the service switch to ensure a safe intervention. We then protected the brick wall and the balcony surface with protective tarpaulins to prevent any splashing of cleaning products.
2. Mechanical cleaning and deep washing
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Removal of the unit panels to access the condenser and internal fins.
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Gentle suction using a specific nozzle to remove accumulated dust without bending the fins.
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Low-pressure water jet cleaning with a biodegradable product designed for aluminum surfaces and HVAC coils.
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Manual cleaning of the grille and fan using anti-static brushes to remove stubborn debris.
This step allowed the fins to be freed, promoting better heat dissipation.
3. Drainage check and functional test
We took advantage of the service call to check the indoor system's drainage line , which is often prone to clogs from dust and condensation. After cleaning, we restarted the heat pump and measured the pressure and airflow to confirm they had returned to optimal levels.
Immediate results and benefits
Once the cleaning was complete, the customer noted:
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A more powerful and stable airflow , noticeable from the first few minutes.
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A reduction in operating noise , a sign of a balanced and unobstructed fan.
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A noticeable improvement in heating and air conditioning performance .
In addition to these immediate benefits, regular maintenance like this helps to:
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Extend the lifespan of the compressor and electrical components.
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Reduce energy consumption , especially during periods of high demand.
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Prevent costly breakdowns due to overheating or insufficient airflow.
The importance of regular heat pump cleaning
Outdoor units like this one, installed on a balcony or terrace, are particularly exposed to:
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Urban traffic dust .
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Pollen and plant debris .
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Humidity and mold growth on unprotected surfaces.
At AirGreen, we recommend a thorough cleaning at least once a year , ideally in the spring, before the start of the air conditioning season. This ensures optimal performance and prevents dirt from accumulating in hard-to-reach areas.
Recognized expertise in Laval and throughout Greater Montreal
As HVAC experts, we meticulously follow manufacturers' recommendations, such as those of Fujitsu , particularly regarding cleaning pressure, products used, and coil maintenance. Every intervention is carried out with appropriate tools and with particular attention paid to safety, cleanliness, and equipment durability.
Whether your unit is installed in a condo in Montreal , in a house in Laval or on the South Shore , our team ensures professional, fast and meticulous maintenance .