Cleaning a Fujitsu Halcyon wall-mounted heat pump in Rosemont–La Petite-Patrie

Balcony maintenance is essential to preserve comfort in an urban environment.

In Montreal's Rosemont–La Petite-Patrie neighbourhood, our AirGreen team was called in to perform a complete cleaning of a Fujitsu Halcyon wall-mounted heat pump installed on the balcony of an urban condo. The unit, exposed to climatic variations and city dust, showed clear signs of soiling on its exterior surface and in the fins of its condenser.

Initial diagnosis: urban deposition and loss of efficiency

Upon our inspection, we observed:

• A thin black layer of urban dust on the top and front of the unit;

• Fins partially obstructed by dirt and pollen residue;

• Melted snow and traces of stagnant water under the support, promoting corrosion;

• A noticeable decrease in efficiency was reported by the customer, with a longer heating cycle than usual.

These symptoms indicated that the heat pump was struggling to transfer heat efficiently, a direct consequence of a dirty heat exchange surface.

Step 1: Securing and preparing the unit

Before beginning the cleaning, our AirGreen technician:

• Cut off the power supply to the device;

• Protect the wall facade and electrical components using waterproof covers;

• Checked the sturdiness of the metal support and the absence of leaks in the refrigeration pipes.

Step 2: Methodical washing of the condenser

Cleaning the condenser is a key step in restoring airflow . Here are the actions performed:

1. Gently brush the aluminum fins to remove surface dust;

2. Application of an environmentally friendly, biodegradable cleaning product designed to dissolve grease, salt and pollen;

3. Rinsing with clean water at low pressure ensures thorough cleaning without damaging the fine fins;

4. Clean the fan and front grille to remove the accumulated dust film.

Thanks to this gentle and effective method, the heat pump has regained optimal airflow.

Step 3: Area cleanup and mechanical checks

Once the cleaning was complete, our team:

• Removed debris and residual water from under the support;

• Inspected the insulation of the refrigeration pipes, replacing a section weakened by moisture;

• Checked that the fan and electrical connections were functioning correctly.

These routine checks ensure safety, durability and performance after each wash.

Step 4: Recommissioning and performance testing

After complete drying and retensioning of the system, the tests showed:

• A significantly higher airflow ;

• A stable and rapid blowing temperature ;

• A gentler noise level thanks to a natural balancing of the cleaned fan.

The customer immediately noticed an improvement in the indoor heating, confirming the effectiveness of the cleaning.

Why clean your wall-mounted heat pump regularly?

A wall-mounted heat pump, especially in an urban environment like Montreal, quickly accumulates:

• Fine dust and pollen;

• De-icing salts and pollution particles;

• Plant debris and traces of moisture.

An annual professional cleaning allows you to:

• Preserve up to 25% more energy efficiency ;

• Avoid compressor overheating ;

• Extend the lifespan of the Fujitsu Halcyon unit;

• Ensuring consistent comfort in summer and winter.

AirGreen's expertise in the heart of Montreal

At AirGreen , we combine technical expertise with environmentally friendly products to deliver impeccable HVAC cleaning services . Our approach is simple: restore efficiency, extend lifespan, and provide healthier air for occupants.

Whether in Rosemont, Outremont, Laval, Longueuil or on the North Shore , our qualified technicians intervene with care, precision and professionalism.

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AirGreen — Your trusted partner for professional HVAC system cleaning in Montreal and throughout the metropolitan area.