A behind-the-scenes look at AirGreen’s emergency HVAC cleaning operations
Thorough cleaning of heating, ventilation, and air conditioning (HVAC) systems is essential to maintain long-term comfort, avoid costly breakdowns, and protect the health of occupants. At AirGreen, we regularly step in throughout Greater Montreal—from Laval to Longueuil, including the North Shore and the South Shore—to resolve critical cases where HVAC equipment has been severely neglected.
Here’s an exclusive look at five emergency interventions where our team was urgently called to handle extreme situations involving contamination, clogging, and major malfunctions. These real-life stories not only highlight what happens when maintenance is overlooked but also demonstrate the depth of expertise we bring to every residential and commercial client.
A Gree Extreme Wall-Mounted Heat Pump Smothered by Mold in Laval
We got the call on a freezing Monday morning in January: a family in Laval noticed their Gree Extreme 18,000 BTU wall-mounted heat pump had completely stopped heating. When we arrived, we found a thick layer of black mold covering the indoor evaporator. The unit, although recent and high-performance, had been completely suffocated by humidity in a poorly ventilated environment.
We immediately carried out a high-pressure steam cleaning, disinfected every internal component with an approved anti-fungal treatment, and adjusted the home's ventilation settings to prevent the issue from recurring.
AirGreen Tip: Even a premium heat pump needs annual maintenance to avoid this kind of situation.
A Central Goodman System Choked by Pet Hair in Montreal
A property manager in the Plateau-Mont-Royal urgently contacted us after several tenants reported bad odors and a sharp drop in airflow. The system involved? A Goodman R-32 central unit serving five indoor heads in a multi-unit building.
The diagnosis was clear: the ventilation ducts and air filters were completely clogged with pet hair and dust. The cause? Not a single cleaning since the system was installed... six years earlier. Our team performed a complete mechanical cleaning of the ducts, replaced all filters, cleaned the outdoor unit, and had everything running again by the end of the day.
A Fujitsu Heat Pump Blocked by a Wasp Nest in Brossard
A homeowner in Brossard, on the South Shore, called us after hearing strange noises coming from their Fujitsu KZAH R-32 wall-mounted heat pump. A quick inspection revealed a wasp nest right inside the fan compartment.
The job required us to call in a certified exterminator, followed by a thorough cleaning of both indoor and outdoor units. The condenser fins had also been bent by the intrusion and had to be delicately straightened using our specialized fin comb.
Extreme Grease Buildup in a Commercial Ventilation System in Saint-Jérôme
In a family-owned restaurant in Saint-Jérôme, we were called in for an emergency when the kitchen’s ventilation system suddenly shut down during the busy dinner service. Upon inspection, we found an extreme buildup of grease and food particles inside the exhaust ducts, posing a serious fire hazard.
We immediately dispatched a night crew to carry out a full degreasing of the ducts, turbine, and filters. The operation took over 7 straight hours, using high-temperature industrial cleaning tools. The next morning, the restaurant was able to reopen safely.
AirGreen Pro Tip: In commercial spaces, regular HVAC maintenance isn’t just a good idea—it’s a critical safety requirement for your staff and customers.
A Bosch IDS Premium System in Blainville Paralyzed by Renovation Dust
After major interior renovations in a home in Blainville, a family realized their Bosch BIVA IDS Premium R-454B central system was no longer functioning properly. After inspection, we discovered that every internal component (fan, heat exchanger, ducts) was caked with gypsum dust and construction debris.
We partially disassembled the central unit, vacuumed and cleaned every surface, and recalibrated the airflow. We also advised the family to install temporary high-density filters during any future renovation work to prevent similar issues.
Why These Extreme Cases Happen... and How to Avoid Them
These five real-world cases show the serious risks of neglecting HVAC maintenance, whether in residential or commercial spaces. Mold, debris, dust, grease—even insects: without proper care, these contaminants can:
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Significantly reduce your system’s energy efficiency
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Lead to expensive breakdowns
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Worsen your indoor air quality
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Pose serious health risks
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Void your manufacturer’s warranty
At AirGreen, we offer fast, professional, and safe cleaning services across Greater Montreal. Our certified technicians use top-tier tools and know the ins and outs of all major brands, including Fujitsu, Bosch, Goodman, Gree, and Mitsubishi.
Our Commitment: Long-Term Solutions, Not Temporary Fixes
What sets us apart is our commitment to going beyond surface-level cleaning. Every job is a chance for us to:
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Identify the root cause of clogs or breakdowns
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Optimize your system’s settings (airflow, temperature, ventilation)
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Recommend upgrades (HEPA filters, variable-speed fans, air quality sensors)
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Educate our clients on best HVAC care practices
Fast Service Throughout Greater Montreal: North Shore, South Shore, Laval, Longueuil
Our mobile teams are ready to respond across the entire metropolitan area, including:
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Montreal (Villeray, Outremont, Verdun, Town of Mount Royal…)
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Laval (Chomedey, Sainte-Dorothée…)
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Longueuil, Brossard, Saint-Hubert…
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North Shore (Terrebonne, Boisbriand, Mirabel…)
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South Shore (Saint-Jean-sur-Richelieu, Candiac…)
Trust AirGreen with Your HVAC Cleaning Needs
Think your heat pump, wall-mounted air conditioner, or central HVAC system might be clogged or underperforming? Don’t wait for a full breakdown. Contact AirGreen today for a comprehensive diagnosis and professional HVAC cleaning.