Repair of a Gree wall-mounted heat pump in Sainte-Thérèse

A heat pump suspended under cover: a typical case of overheating in Sainte-Thérèse

When a customer from Sainte-Thérèse , on Montreal's North Shore , contacted us, their Gree wall-mounted heat pump was no longer blowing cold air. Installed on a wall bracket under a patio shelter, this configuration, while practical for protecting the compressor from the elements, had one disadvantage: poor air circulation around the condenser .

At AirGreen , we often see this type of situation — outdoor units installed too close to a roof or structure, which ultimately leads to performance issues and compressor overheating .

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Complete diagnosis: a compressor stifled by lack of ventilation

Upon our arrival, our technicians carried out a methodical inspection:

1. Abnormally high discharge temperature , a sign of limited heat exchange.

2. Condenser fins partially clogged with dust and cobwebs, reducing airflow.

3. R-410A refrigerant pressure above standards: a clear indicator of cycle overheating.

4. Intermittent noise from the exterior fan , caused by a tired motor that has repeatedly overheated.

After these checks, the diagnosis was unequivocal: the condenser fan had to be replaced and the installation area required correction to improve ventilation .

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On-site repair: fan replacement and installation adjustment

We started by turning off the power and removing the condenser cover . Once the motor was disassembled, we found that its shaft was partially seized by moisture. The replacement was carried out with an original Gree motor , which was perfectly compatible.

During the repair, we:

• Cleaned the coils at high pressure with a specialized biodegradable product.

• Checked the wall mounting brackets : some had flexed slightly over time, which could create vibrations. We tightened and reinforced them.

• Added anti-vibration rubber spacers to limit noise and extend engine life.

Once everything was reassembled, we powered the system back up and performed a full test. The fan started without any unwanted noise, and the refrigerant temperature returned to ideal parameters.

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Result: restored performance and secure installation

A few minutes after restarting, the heat pump was blowing air at 11°C , which corresponds to optimal performance for a Gree wall-mounted system in air conditioning mode. The compressor returned to a stable cycle , without untimely shutdowns.

We also recommended some simple adjustments to the client:

• Remove two boards from the patio roof above the unit to allow better air circulation.

• Maintain a minimum distance of 30 cm between the top of the condenser and any obstacle.

• Have the coils cleaned every spring before the hot season.

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A Lesson for Residential Shed Installations

Outdoor wall units installed under semi-enclosed structures are common in Sainte-Thérèse, Blainville, and Boisbriand. However, this type of location must be carefully considered . An HVAC unit requires a constant flow of air to remove heat. Without this, the compressor becomes exhausted, energy consumption increases, and the equipment's lifespan decreases.

At AirGreen , our technicians always take into account the unit's environment —orientation, clearances, sun exposure—in order to optimize the system's overall performance.

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AirGreen Expertise: rapid intervention on the North Shore

Whether you are in Sainte-Thérèse , Boisbriand , Blainville or Terrebonne , our team covers the entire North Shore as well as Montreal, Laval, Longueuil and the South Shore . We guarantee precise, durable repairs that meet the strictest HVAC standards.

Our approach is based on three principles:

1. Rigorous diagnosis before replacing parts.

2. Exclusive use of original components.

3. Optimization of energy efficiency after repair.

Thanks to this method, our clients benefit from renewed comfort and lasting peace of mind.