A meticulous intervention to breathe new life into a clogged wall-mounted installation
At AirGreen , we know that regular maintenance of HVAC systems is not a mere formality: it is the key to preserving performance, durability and air quality in any building.
Our team was recently called to Rosemont–La Petite-Patrie , in a typical Montreal brick building, to perform a complete cleaning of an outdoor wall-mounted heat pump that was showing obvious signs of fouling.
Symptoms before our intervention
The client contacted us after noticing several worrying signs:
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A decrease in airflow inside;
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An unusual noise coming from the outdoor unit;
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A visible accumulation of dust and dirt on the heat exchanger fins;
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And a sudden increase in electricity consumption over the past month.
Upon visual inspection, our technicians immediately noticed a significant accumulation of dust and debris on the fins of the outdoor unit, combined with saturated internal filters and a slightly obstructed drain .
This type of fouling prevents the heat pump from breathing properly, which reduces its efficiency and accelerates premature wear of the compressor .
The AirGreen cleaning process
At AirGreen, we apply rigorous methods, respecting manufacturer standards and best practices in the HVAC industry .
Here is how the intervention unfolded.
1. Securing and preparing the workstation
Before any handling, our technicians installed two secure access ladders , allowing access to the unit fixed at a height of more than two meters.
A power cut was carried out at the source to ensure the safety of the team and the client.
2. Complete unit inspection
The outdoor unit was partially disassembled to access the heat exchanger, fan and condensation tray.
Our specialists have checked:
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The condition of the heat exchanger fins (some were slightly bent due to stuck-on dirt);
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The condensation drain , where a dust plug had formed;
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The refrigeration fittings , to ensure that no refrigerant leaks were present.
3. Thorough cleaning of the heat exchanger
Using a biodegradable cleaner designed for HVAC surfaces, the fins of the outdoor unit were carefully washed at low pressure to avoid any deformation.
This step helps to remove grease, fine dust and urban pollution residues that accumulate over the seasons.
A rinse with clean water followed, ensuring a complete refurbishment without any chemical traces.
4. Clearing and disinfection of the drain
The condensation drain was unblocked manually, then rinsed with a mild disinfectant solution to prevent the formation of mold and bacteria .
This attention to detail ensures free flow and prevents any unpleasant odors inside.
5. Cleaning the indoor unit
Inside, we removed and washed the washable filters with warm water and mild soap.
The front panel and fan housing were also dusted and then wiped with an anti-static microfiber cloth.
Finally, an antibacterial treatment was applied to the evaporator to sanitize the blown air.
Result: restored efficiency and comfort
After the system was fully reassembled and put back into service, the effects were felt immediately:
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The airflow has increased significantly;
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The noise level of the outdoor unit has been reduced;
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And the indoor temperature has become stable again, without sudden variations.
The customer noted that his heat pump seemed to be "breathing again".
A simple cleaning operation thus made it possible to restore up to 20% of energy efficiency and prevent potential costly breakdowns .
Why choose AirGreen for your HVAC heat pump cleaning?
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Certified technicians trained according to manufacturers' guidelines;
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Environmentally friendly and non-corrosive products used at each stage;
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Secure methods guaranteeing the protection of your equipment;
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Fast and courteous service , tailored to residential and commercial needs.
Heat pump cleaning is not just about aesthetics: it is an essential preventative maintenance .
At AirGreen, we recommend a complete cleaning at least once a year , ideally in spring or autumn, to prepare for the heating or air conditioning season.
Maintenance tips between professional cleanings
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Clean your internal filters monthly during periods of intensive use.
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Keep the area around the outdoor unit clear (no leaves, branches or objects).
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Monitor for any abnormal noise or drop in performance and call us quickly if you have any doubts.
These simple actions, combined with periodic professional cleaning, prolong the life of your appliance and maintain optimal air quality in your home.
At AirGreen, our mission is clear: to offer our customers in Montreal, Laval, Longueuil, the North Shore and the South Shore complete, sustainable and safe HVAC services .
Each cleaning is carried out with the same care as if the equipment were our own.
Your comfort and the health of your indoor air are at the heart of our commitment.