A neglected outdoor heat pump on a balcony
During a visit to a client in Saint-Lambert , we were called in to perform a complete cleaning of a Lennox heat pump installed on a condominium balcony. The unit, while functional, showed several signs of accumulated dirt and reduced efficiency. Upon close inspection, dust was visible on the fins , slight traces of rust on the protective grille, and a thin layer of debris on the top of the casing—all telltale signs of infrequent maintenance.
Symptoms before our intervention
The customer had noticed for a few weeks:
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A decrease in airflow from the indoor unit.
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A louder noise from the outdoor fan.
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Slightly higher electricity consumption .
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And above all, reduced heating performance on cold days.
These symptoms are typical of a dirty heat pump , where dust and particles clog the fins, preventing optimal heat exchange. This not only reduces performance but also accelerates compressor wear.
AirGreen Professional Cleaning Steps
1. Complete inspection of the Lennox unit
Before any intervention, our technician carried out a visual and functional inspection : checking the electrical connections, the unit's mounting, and the overall condition of the condenser. No major damage was found, but the fins required thorough cleaning .
2. Protection and preparation of the workstation
The balcony was carefully protected to prevent any splashes of dirty water. We always use waterproof tarpaulins and wall protectors , especially in residential settings.
3. Application of a biodegradable cleaner
To remove dust and microorganisms, we applied an environmentally friendly cleaning product specifically designed for HVAC systems. This gentle detergent effectively dissolves grease without damaging the aluminum fins.
4. Controlled pressure rinsing
Once the product had taken effect, a low-pressure water jet rinse removed the accumulated dirt without bending the fins. This step is crucial: it restores the heat pump's optimal airflow and significantly improves its efficiency.
5. Cleaning the grille and the fan
The fan and front grille were also washed and dried. Light rust was treated with a protective coating , ensuring better weather resistance.
6. Final verification and performance testing
After reassembly, the heat pump was restarted . We checked the airflow, the blowing temperature, and the compressor noise . The customer immediately noticed quieter operation and improved efficiency.
Results obtained
Thanks to this intervention:
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The Lennox unit has regained its full thermal capacity .
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The noise level has been reduced.
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Energy consumption has decreased.
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The customer now benefits from cleaner air and restored comfort, while also extending the lifespan of their equipment.
Why entrust your cleaning to AirGreen
At AirGreen , we offer a complete HVAC cleaning service in Montreal, Laval, Longueuil, the North Shore, and the South Shore . Our certified technicians adhere to manufacturer recommendations such as Lennox, Fujitsu, Daikin, and Mitsubishi. We use only safe and environmentally friendly products specifically formulated for the delicate surfaces of heat exchangers.
Annual professional cleaning is the best guarantee for:
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Maintain the energy performance of your system.
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Preventing costly breakdowns .
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Ensuring healthy indoor air .
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Preserve the longevity of your investment .