A dirty outdoor heat pump: a typical case encountered in Côte-des-Neiges
At AirGreen , we were recently called in to perform a complete cleaning of an LG heat pump installed outside a residence in the Côte-des-Neiges neighbourhood of Montreal. As is often the case after several seasons, the surface of the unit was covered in dust and atmospheric deposits , significantly reducing the system's performance.
The customer contacted us after noticing that her unit was taking longer to heat and cool , and that an unusual noise was being heard when the fan was running.
Initial diagnosis: a heat pump suffocated by dust
During our inspection, we observed:
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A thick accumulation of dust on the top and on the fan grille.
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Obstructed heat exchanger fins , limiting air circulation.
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Leaves and debris stuck in the base of the unit.
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A partially obstructed secondary drain , which could affect the proper drainage of condensation.
This type of dirt often accumulates when the heat pump is installed near a brick wall , where airflow is naturally restricted. Over time, this configuration increases dust buildup and reduces energy efficiency.
Our professional cleaning method
To restore the device to optimal performance, our team followed these cleaning steps :
1. Securing and preparing
We turned off the power supply, removed the leaves and cleaned around the slab to avoid any contact with the dust that was re-suspended.
2. Mechanical cleaning
Using a soft, anti-static brush and a specialized vacuum cleaner , we removed the visible dust from the fan, fins, and external surface. This manual cleaning removes dirt without risking damage to the aluminum fins.
3. Application of a biodegradable cleaning product
We sprayed an environmentally friendly detergent specifically designed for HVAC systems , formulated to dissolve grease and deposits without damaging metals. After a settling time, a low-pressure rinse ensured a thorough cleaning while protecting sensitive components.
4. Drain clearance
The drain was blown out with compressed air to eliminate any possible obstruction, thus ensuring good drainage of the condensate.
5. Performance verification and testing
Once the cleaning was complete, we checked:
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The free rotation of the fan ;
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The sound level of the system (noise disappeared);
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Operating pressure and temperature have returned to normal values.
Results after cleaning
The results were immediate:
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The client noticed a rapid return of thermal comfort in her home.
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The abnormal noise has completely disappeared.
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The system's energy efficiency has been significantly improved , reducing the duration of heating and cooling cycles.
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The unit's exterior appearance has been restored to a clean and professional state , also contributing to better durability.
Why should you have your heat pump cleaned every year?
An annual professional cleaning is essential for:
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Prevent costly breakdowns due to compressor overheating;
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Maintaining healthy indoor air quality ;
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Reduce energy consumption ;
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Extend the system's lifespan .
At AirGreen, we recommend maintenance in the spring or fall , in order to prepare the heat pump before periods of high demand.
AirGreen's expertise at your service
Our team of RBQ certified technicians operates throughout Montreal, Laval, the North Shore and the South Shore , scrupulously respecting the directives of manufacturers such as LG, Fujitsu, Haier, and other recognized brands.
We combine specialized tools, environmentally friendly products and safe procedures to offer a deep cleaning that optimizes performance and extends the life of your device.
Need a complete cleaning of your LG heat pump in Montreal or the surrounding area?
Contact AirGreen today for fast, professional and guaranteed service.