A meticulous intervention to revive a clogged outdoor unit
At AirGreen , we were recently called to Sainte-Thérèse for a complete cleaning of a wall-mounted heat pump installed on the balcony of a residential building. The Excel brand unit showed clear signs of accumulated dirt and reduced efficiency. As is often the case in urban and semi-urban environments, constant exposure to dust, pollution, and harsh weather had caused significant fouling of the outdoor unit.
Symptoms observed before our intervention
The customer contacted us after noticing that their system was taking longer to heat up and that the airflow seemed reduced. Upon inspection, we found:
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Condenser fins obstructed by a thick layer of dust.
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Traces of moisture and debris around the drain.
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An accumulation of dirt on the surface of the crankcase and insulated ducts.
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Abnormal noises during compressor operation, due to restricted airflow.
These elements clearly indicated that a complete professional cleaning was necessary.
Our step-by-step cleaning process
We carried out a methodical cleaning , respecting the safety instructions and the manufacturer's recommendations.
1. Preparation of the intervention area
We started by cutting off the power at the outside circuit breaker to ensure complete safety. Since the balcony is narrow, we installed a protective barrier to prevent water or debris from splashing onto the walls or railing.
2. Inspection and partial dismantling
We removed the front cover of the heat pump to access the heat exchanger. A visual inspection confirmed the presence of a greasy and sticky film , often caused by urban pollution and micro-particles of dust.
3. Washing the heat exchanger
Using a low-pressure water jet and a biodegradable cleaner specifically designed for aluminum surfaces , we carefully washed the condenser fins. This treatment removes deposits while preserving the delicate structure of the fins.
4. Cleaning the drain and pipes
We then cleared the partially blocked condensation drain to prevent future water leaks. The insulated pipes were also wiped and checked to ensure they remained completely watertight.
5. Rinse, dry and final check
After a thorough rinse, we allowed the unit to dry completely before restoring power. A functional test confirmed that the airflow had returned to normal and the compressor noise had disappeared.
Results after cleaning
The result was immediate:
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Fresher air and optimized circulation ,
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Reduced heating start-up time ,
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Reduced energy consumption ,
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And above all, a system ready to face winter without overworking.
The customer noticed a difference within the first few hours of use. This type of cleaning, ideally performed once or twice a year , greatly contributes to the durability and performance of the HVAC system.
Why use AirGreen?
At AirGreen , we don't just perform a surface wash: we ensure a deep cleaning that is gentle on electronic and mechanical components. Our technicians are trained to work on all types of heat pumps, whether wall-mounted, central, or multi-zone models.
We only use:
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certified eco-friendly products free of harmful residues;
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specialized cleaning tools for fins and fans;
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and procedures that comply with manufacturers' recommendations .
In conclusion
A professional wall-mounted heat pump cleaning in Sainte-Thérèse can transform a worn-out system into a high-performing and quiet unit. Thanks to our service, this client now enjoys cleaner air, renewed comfort, and better-controlled energy bills.