Preventive maintenance is essential to protect performance and extend the system's lifespan.
At AirGreen , we regularly perform thorough cleanings of outdoor heat pump units across the South Shore , particularly in Brossard . These services aim to eliminate dirt, rust, and debris that compromise system performance.
In this particular case, our team was called in to inspect and clean an outdoor unit installed under a patio , a location often chosen for its discretion, but which promotes the accumulation of moisture and debris. The client had noticed a louder than usual noise and a decrease in heating efficiency at the beginning of the season.
Initial diagnosis: fouling and superficial corrosion
Upon our arrival, we observed:
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An accumulation of dust and leaves around the rear grille;
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Traces of corrosion at the base of the chassis;
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Imperfect water drainage on the paved floor, leading to stagnation around the base of the device;
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And deteriorated insulation of external pipes , exposed to the elements.
These combined factors reduce the efficiency of heat exchange and increase the workload of the compressor, potentially damaging internal components in the long term.
AirGreen Cleaning Steps
1. Power off and prepare the area
Before any handling, our technician cut off the power supply and cleared the area around the unit to avoid any contact with water or cleaning products.
2. Initial mechanical cleaning
Using a soft brush and an industrial vacuum cleaner , we removed the leaves, dust, insects, and debris stuck in the rear grille and on the condenser fins. This first step helps prevent any blockages during pressure washing.
3. Application of a biodegradable cleaning product
We sprayed an environmentally friendly condenser cleaner on the external coils, letting the solution work for a few minutes to loosen grease and air pollution deposits. This pH-neutral product is safe for metals and harmless to animals and surrounding plants.
4. Low-pressure rinsing
The rinsing was carried out with a low-pressure water jet directed from the inside out , so as not to bend the fins. The drained water was visibly laden with black particles and fine dust, evidence of the fouling accumulated over the seasons.
5. Check the drain and clean the base
We cleaned the base of the unit , removing any stuck debris and ensuring proper drainage to the outside. Particular attention was paid to the area of surface rust , which was treated with a rust inhibitor to prevent further spread.
6. Replacement of damaged insulation
The insulating sheaths of the refrigerant lines have been replaced to provide better protection against heat loss and moisture.
Results after the intervention
At the end of the cleaning, several improvements were observed:
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The fan noise has decreased noticeably.
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The airflow around the condenser has returned to optimal levels.
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The heat exchange rate has improved, allowing the heat pump to operate more efficiently.
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The discharge temperature has been stabilized, a sign of good refrigeration efficiency.
The client was also advised of the need for annual cleaning , particularly for units installed in semi-enclosed areas or under structures such as a patio.
Why outdoor unit maintenance is crucial
Many homeowners focus their cleaning efforts on the indoor unit, forgetting that the outdoor unit is the heart of the HVAC system . Exposed to the elements, it accumulates:
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Dust, pollen and plant debris;
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Grease and pollution particles;
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Corrosion due to humidity and salt in winter;
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And sometimes blockages caused by insects or small animals .
An annual cleaning by an AirGreen professional guarantees:
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Reduced energy consumption ;
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Increased compressor lifespan ;
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A stable return throughout the year ;
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And improved reliability of the heating and air conditioning system .
AirGreen's expertise
Our technicians follow a rigorous protocol adapted to each type of installation. Whether it's a wall-mounted, central, or multi-zone heat pump , each component is cleaned according to the manufacturer's standards .
We use only biodegradable products , without harsh acids or solvents, and equipment designed to preserve the integrity of the fins and coils .
At AirGreen, every cleaning is also a preventative inspection : we check the condition of electrical connections, insulation and floor support to anticipate any future problems.
AirGreen – Experts in heat pump maintenance and cleaning in Brossard and throughout the South Shore of Montreal.