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Réparation d’une thermopompe murale LG Dual Inverter à Sainte-Julie
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Repair of an LG Dual Inverter wall-mounted heat pump in Sainte-Julie

A heat pump in preventive maintenance: when performance depends on interior cleanliness

At AirGreen , we often emphasize one essential point: a high-performance HVAC system depends above all on its regular maintenance . This is precisely what we demonstrated during a service call in Sainte-Julie , on the South Shore of Montreal , where we carried out a complete maintenance of an LG Dual Inverter wall-mounted heat pump .

The customer had noticed a decrease in cold airflow and water accumulating at the bottom of the wall just below the unit over the past few weeks. These are classic signs of overdue maintenance.

Diagnosis: blocked condensates and dirty exchanger

Upon our arrival, our technician noticed that the heat pump—an LG Dual Inverter model, known for its energy efficiency—had not been cleaned in over two years. This lack of maintenance had caused:

  • Significant fouling of the evaporator coil , reducing heat exchange.

  • A partially clogged drainage tray , causing water to overflow.

  • A slight damp smell , a sign of bacterial proliferation on the internal fins.

These symptoms are common in wall-mounted appliances located in heavily used rooms such as the living room or kitchen, where dust and grease accumulate more quickly.

Intervention: complete cleaning under tarpaulin and circuit check

To ensure splash-free cleaning and thorough decontamination, our team installed a professional wash-down cover specially designed for wall-mounted units. This method directs cleaning water directly into a drain, without dirtying the walls or floors.

The steps taken:

  1. Removing the filters and front cover .

  2. Applying a biodegradable cleaner to the evaporator coil.

  3. Pressure-controlled rinse with warm water to remove residue.

  4. Cleaning the cylindrical fan (turbine) to remove accumulated dust.

  5. Disinfection of the condensate tray and drainage pipe using an antifungal solution.

  6. Checking the proper functioning of the ventilation motor and the temperature sensor .

During the process, the customer was able to observe how dark the drain water became , tangible proof of the importance of this maintenance.

Result: restored efficiency and immediate comfort

Once the cleaning was complete, the difference was immediate:

  • Airflow has doubled thanks to cleaning the fan.

  • The air became fresh, dry and odorless again.

  • The system was draining condensate properly, with no leaks or moisture on the wall.

  • The heat pump was able to resume operation at full capacity, reducing electricity consumption .

The customer, satisfied with the result, chose to add his device to our annual AirGreen maintenance program , a solution that helps avoid this type of problem in the future.

Why Regular Maintenance Is Crucial for LG Heat Pumps

LG Dual Inverter heat pumps are renowned for their reliability and low energy consumption, but like any HVAC unit, they require regular attention.

A lack of maintenance can lead to:

  • Excessive power consumption due to a dirty fan.

  • A loss of heating or air conditioning power .

  • Condensate leaks that damage walls.

  • A risk of premature compressor failure .

At AirGreen, our technicians are specifically trained to maintain and repair LG systems , as well as Fujitsu, Midea, Gree, Sharp, Daikin, Mitsubishi, Bosch and Goodman brands.

Our approach: clean, fast and guaranteed service

Each AirGreen intervention follows a rigorous protocol:

  • Complete protection of the work area thanks to our waterproof washing tarpaulins.

  • Eco-friendly products certified safe for occupants and animals.

  • Complete performance test after intervention : pressure, temperature, drainage and power consumption.

  • Detailed report provided to the client with personalized recommendations.

This approach guarantees each resident of Sainte-Julie , but also of Laval , Longueuil , Montreal , the North Shore and the South Shore , a professional and sustainable service.

Conclusion: Maintenance that extends the life of your system

Thanks to this comprehensive maintenance, the customer's LG Dual Inverter heat pump is now working like new. By investing in regular professional cleaning , homeowners not only ensure greater comfort, but also increased longevity of their unit .

At AirGreen, we believe that a clean system is a high-performance system.