Cleaning a wall-mounted heat pump in Sainte-Julie

Meticulous maintenance for restored performance

At AirGreen , we know that a simple cleaning can transform the comfort of a home. This is exactly what we demonstrated during our recent maintenance of a wall-mounted heat pump in a residence in Sainte-Julie , on Montreal's South Shore . The client contacted us after noticing a significant decrease in airflow and a slight musty odor when the unit was turned on.

Initial diagnosis: clogged filters and dirty fins

Upon arrival, we carried out a complete inspection of the indoor unit.
The first signs of dirt were visible as soon as the hood was opened:

• Air filters saturated with fine dust and animal hair;

• Evaporator fins covered with a greyish deposit;

• Partially blocked drain , retaining condensation water;

• Slight musty smell , typical of delayed maintenance.

Although the heat pump was still functional, this buildup was impairing performance, increasing energy consumption, and reducing indoor air quality.

Intervention: complete cleaning and antibacterial treatment

We carried out a complete cleaning of the wall-mounted heat pump , following a rigorous protocol in accordance with the manufacturer's recommendations.

Step 1 – Disassembly and protection

We carefully removed the filters, deflectors and front panels.
The surrounding surfaces were protected to prevent any splashing.

Step 2 – Washing the filters

The filters were washed with warm water and biodegradable soap , then rinsed under controlled high pressure. This treatment eliminates microparticles and restores the transparency of the mesh.

Step 3 – Cleaning the evaporator

Using an environmentally friendly cleaning product specifically designed for HVAC coils , we sprayed the fins to dissolve grease and mineral deposits.
A gentle jet rinse then removed the residue, restoring the heat exchanger to its original shine.

Step 4 – Internal disinfection and cleaning of the fan

The tangential fan was brushed and rinsed with a mild antibacterial mixture, eliminating biofilms responsible for persistent odors.
A disinfectant treatment was applied inside the crankcase.

Step 5 – Unclogging the condensation drain

Using a reverse pressure pump , we cleared the drain to ensure free flow. This step prevents water leaks and bacterial growth in the tank.

Result: purified air and restored efficiency

As soon as it was restarted, the change was obvious:

• Airflow increased by approximately 30% ;

• more even temperature in the room;

• Complete disappearance of odors ;

• Optimized energy consumption thanks to efficient heat exchange.

The customer noticed improved air quality and reduced noise from the unit. These immediate improvements confirm the importance of annual maintenance, especially before the peak heating and cooling seasons.

Why trust AirGreen for your heat pump maintenance?

At AirGreen, every HVAC cleaning is performed with safe products , professional equipment and recognized expertise on the South Shore, in Montreal and Laval.
Our technicians follow a precise protocol: inspection, washing, rinsing, disinfection and final test, guaranteeing a functional and hygienic refurbishment.

We remind our customers that regular maintenance of a wall-mounted heat pump is essential .

• Extends its lifespan;

• Reduces the risk of major breakage;

• Improves indoor air quality;

• Maintains optimal energy efficiency.

Preventive maintenance: a small step for big benefits

A clean appliance works less hard, heats up or cools down faster, and uses less electricity. That's why we recommend a complete professional cleaning at least once a year , along with a visual inspection each season.

Thanks to our expertise, we help every home breathe cleaner air while protecting their HVAC system investment.