A service call on a sunny terrace in West Montreal
At AirGreen , we were recently contacted for a Quietside wall-mounted heat pump repair in a charming residence in Beaconsfield , on the West Shore of Montreal . The client had noticed a significant drop in performance of their heating and cooling system, accompanied by an abnormal noise coming from the outdoor unit located on their wooden deck.
This type of installation, exposed to the elements on a rooftop terrace, presents unique challenges—including managing defrosting, drainage, and vibration. Our technical team responded quickly to diagnose the cause of the failure and restore the customer's comfort.
Initial diagnosis: loss of efficiency and excessive vibrations
Upon our arrival, our technician noticed several signs:
-
The Quietside outdoor unit, mounted on a metal stand, exhibited abnormal vibrations upon startup.
-
The compressor seemed to struggle to reach normal pressure, causing a drop in energy efficiency .
-
Inside, the customer reported lukewarm air in air conditioning mode despite a mild outside temperature.
After a comprehensive examination, we detected two main causes:
-
Accumulation of dust and debris in the outdoor heat exchanger, limiting heat evacuation.
-
Fan misbalance , causing vibration and high operating noise.
Steps of repair
1. Thorough inspection and complete cleaning
We removed the protective grille to clean the condenser using a non-corrosive product suitable for aluminum fins. This cleaning restored good airflow and removed the residue accumulated over the past few seasons.
2. Checking the anti-vibration mounts
The anti-vibration pads under the unit were worn. We replaced them with more robust models, specially designed for overhead or deck installations. This simple adjustment significantly reduced the noise level.
3. Fan rebalancing
The fan motor was slightly misaligned. After readjusting and lubricating the shaft, operation became smooth and quiet again.
4. Full cycle test and pressure check
We then measured the refrigerant pressure and the blowing temperature . The values were slightly below the standards. A small recharge of R-410A refrigerant was carried out to optimize the compressor's efficiency.
Results: a heat pump that is once again efficient
After the intervention, the Quietside heat pump regained its full performance:
-
Stable interior temperature and rapid achievement of the set point.
-
Appreciable operating silence , thanks to the reduction of vibrations.
-
Energy efficiency restored , with a standardized defrost cycle.
The customer immediately noticed the difference, including the return of powerful fresh air in air conditioning mode . We recommended annual preventive maintenance , which is especially important for units installed outdoors on terraces or flat roofs, where dust and wind can accelerate wear.
Maintenance tips for a heat pump on a terrace
Exposed outdoor installations, like this one, require some extra attention:
-
Clean the condenser at least twice a year (spring and fall).
-
Check drainage after snow melts to prevent water accumulation.
-
Clear away snow in winter to ensure good ventilation of the unit.
-
Schedule an annual professional inspection to prevent refrigerant leaks and maintain compressor efficiency.
AirGreen expertise at the service of your comfort
At AirGreen , we operate throughout Montreal, Laval, Longueuil, on the North Shore and the South Shore , for the repair and maintenance of HVAC systems of all brands: Quietside, Gree, Midea, Fujitsu, Sharp, Hitachi, Bosch, Lennox , and many others.
Our certified technicians ensure that each unit operates at its maximum potential, while extending its lifespan.
This intervention in Beaconsfield clearly illustrates our commitment: speed, transparency and technical excellence — the three pillars of a trustworthy HVAC service.