A targeted intervention to restore the performance of an HVAC system
At AirGreen , we regularly service wall-mounted heat pumps whose efficiency has decreased over time, often due to a lack of exterior maintenance. This was the case with this unit installed in Rosemère , against a brick wall, where the homeowner contacted us after noticing that his heat pump seemed less efficient and slightly noisier than usual.
Initial state of the outdoor unit
During our inspection, we observed a significant accumulation of dust and dirt on the top and fins of the unit. Debris, dead leaves, and even traces of organic matter were partially obstructing the airflow. This situation is typical for a unit exposed to the elements without regular cleaning.
The upper case also had a small perforation caused by a light impact, which facilitated the penetration of dust and moisture into the compartment.
Diagnosis before cleaning
Our technicians have identified several critical points:
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The condenser fins are clogged , reducing heat exchange.
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Fan partially covered with residue , generating a minor mechanical imbalance.
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Exterior drain clogged with deposits, risking blocking water drainage.
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Slightly exposed wiring , requiring a safety check before washing.
These problems, although frequent, can quickly lead to compressor overload and increased power consumption , hence the importance of annual professional maintenance.
Cleaning steps performed by AirGreen
1. Securing and preparing
We first disconnected the heat pump's power supply , removed the top covers, and cleared the surrounding area. Because space was limited between the wooden fence and the brick wall, our team used compact tools to efficiently access each section.
2. Cleaning the fins and the condenser
Applying a biodegradable cleaning product , specifically designed for aluminum surfaces, dissolved the residue without damaging the fins. After allowing the product to soak, we rinsed it with fresh water under low pressure , ensuring a uniform cleaning without deformation.
3. Cleaning the fan and internal compartment
With the cover removed, we carefully dusted the fan blades using a soft brush and a microfiber cloth dampened with a non-corrosive disinfectant. This step eliminated the greasy deposits responsible for the imbalance and noise.
4. Unblocking the drain and checking the flow
We then cleared the drainpipe , removing the accumulated debris with a compressed air hose. This cleaning ensures proper drainage of condensation, essential for preventing ice formation in winter or stagnant odors.
5. Electrical verification and final test
Once the unit was thoroughly cleaned and dried, we inspected the electrical connections and replaced the protective covers. The restart proceeded without any issues: the noise was significantly reduced, and the hot air output was much more stable.
Results obtained
The intervention made it possible to:
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Reduce operating noise by nearly 40%.
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Improve energy efficiency through better heat dissipation.
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Optimize compressor lifespan by reducing mechanical load.
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To restore immediate comfort inside the residence.
The client also benefited from our personalized recommendations, including on maintenance frequency , spring preventative cleaning and winter protection using a breathable cover.
The AirGreen approach: rigor, safety and respect for the environment
Every heat pump cleaning performed by AirGreen follows a rigorous protocol. We combine environmentally friendly products with a precise methodology that adheres to manufacturers' specifications. Our goal is simple: to maximize the performance and lifespan of every HVAC system installed on the North Shore, while guaranteeing better air quality for our clients.