Cleaning a Fujitsu wall-mounted heat pump in Plateau-Mont-Royal

A preventative intervention in a typical Montreal building

At AirGreen , we were recently contracted to perform a complete cleaning of a Fujitsu wall-mounted heat pump installed at the rear of a residential building in Montreal's Plateau-Mont-Royal neighbourhood. This older area, characterized by brick buildings and narrow balconies, often presents unique challenges for HVAC system maintenance: limited access, urban dust, and constant exposure to varying weather conditions.

The client contacted us after noticing a decrease in the performance of their heat pump: the air coming out was less cold in cooling mode, and an unusual noise could be heard outside. These symptoms indicated a probable accumulation of dust on the fins and a lack of annual maintenance .

Initial diagnosis: dirt and fouling of the condenser

Upon arrival, our team observed:

• A Fujitsu condenser clogged with a thin layer of urban dust;

• Partially obstructed fins , reducing airflow;

• Some traces of surface corrosion due to persistent moisture between the brick walls;

• A slight vibration of the fan caused by an imbalance due to the accumulation of dirt.

This type of fouling is typical of urban installations. Even though the heat pump appeared to be working, it consumed more energy to maintain the same level of comfort, a clear sign of reduced energy efficiency.

Fujitsu Heat Pump Cleaning Steps

Our team carried out a thorough and methodical maintenance , respecting safety standards and the manufacturer's recommendations:

1. Power supply cut off and unit put into safe mode.

2. Remove the outer cover to access the fan and condenser.

3. Gentle suction using a brush attachment to remove surface dust.

4. Application of an environmentally friendly cleaner designed for HVAC coils, ensuring the breakdown of grease and fine particles without damaging the fins.

5. Low-pressure rinsing to restore optimal airflow.

6. Clean the fan and the collection tray to avoid any noise and accumulation of stagnant water.

7. Checking electrical connections and wall support , ensuring the stability and safety of the installation.

Particular attention has been paid to the rear area of ​​the condenser , which is often neglected but essential for good heat exchange.

Results after intervention: restored performance and quietness

Upon restarting, the Fujitsu heat pump demonstrated an immediate return to optimal performance :

• The flow of cold air has regained its initial strength;

• The operating noise has decreased significantly;

• The indoor temperature stabilized more quickly , reducing the compressor's operating time;

• Energy consumption has been optimized.

The client expressed satisfaction upon noticing a significant improvement in interior comfort and a more discreet noise level , a crucial factor in Plateau apartments where spaces are often limited.

Why an annual cleaning is essential

Wall-mounted heat pumps, particularly in urban areas like Montreal, require professional cleaning at least once a year . Without this maintenance:

• The coils become clogged , reducing energy efficiency;

• Indoor air quality deteriorates due to dust and potential mold;

• And the compressor's lifespan can be reduced by several years.

At AirGreen, we prioritize the use of environmentally friendly products , specialized tools and a methodology adapted to each brand and model , ensuring safe and sustainable maintenance.

Conclusion: a system ready for the summer season

Thanks to this comprehensive maintenance, the Fujitsu wall-mounted heat pump in Plateau-Mont-Royal is now ready to face the summer heat while guaranteeing maximum comfort.
This intervention highlights the importance of regularly cleaning HVAC systems : a simple preventative operation can make all the difference between a high-performing unit and a costly breakdown.