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

An outdoor compressor stopped: a Gree heat pump restarted thanks to AirGreen expertise

At AirGreen , we know that a reliable heating and cooling system is essential for our customers' year-round comfort. Recently, our team was called to Sainte-Thérèse , on Montreal's North Shore , to diagnose and repair a Gree wall-mounted heat pump whose outdoor unit was no longer starting. In the middle of summer, this type of breakdown can quickly turn a home's comfort into a source of frustration. Our goal: to identify the cause of the problem, make a lasting repair, and optimize the system's performance .

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First observation: a silent Gree compressor and a stationary fan

Upon arrival, we visually inspected the outdoor unit. The Gree compressor , recognizable by its compact casing and AirGreen stickers certifying proper installation, appeared intact. However, there was no noticeable startup noise or fan rotation . A typical sign of an electrical problem or blocked startup .

Using our multimeter, we checked the voltage at the disconnect box. The 240V power supply was present, which confirmed that the fault was not coming from the electrical panel. The next step was to examine the control board and the start capacitor .

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Accurate diagnosis: a faulty starting capacitor

Upon removing the front of the outdoor unit, we noticed that the start capacitor was showing signs of swelling—a classic symptom of wear. This small component plays a crucial role: it provides the initial boost needed to get the compressor and fan running. Without it, the system remains silent.

We replaced the capacitor with an original Gree model, respecting the exact capacitance values ​​in microfarads (µF). After the substitution, an immediate test was carried out: upon restart, the fan started and the compressor started without excessive noise . The heat pump thus regained its full functionality.

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Next step: complete check of the refrigeration cycle

Replacing the capacitor is only part of the job. To ensure a lasting repair, our technicians performed a complete analysis of the refrigeration cycle :

• Measuring the pressure of R410A refrigerant .

• Checking the temperature differential between incoming and outgoing air .

• Observation of the compressor amperage rate to confirm normal consumption.

• Inspect flare fittings for potential leaks.

Result: All values ​​were within Gree standards. There was no sign of refrigerant loss, and the indoor air temperature quickly stabilized at 17°C, ensuring optimal comfort inside the home.

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Cleaning and preventive maintenance of the installation

Taking advantage of the intervention, we also carried out a partial cleaning of the outdoor unit .
Dust and debris had accumulated on the heat exchanger fins, which can impair heat dissipation. Using a low-pressure jet and a specialized cleaner, we restored the condenser to full efficiency.

We also took care to check:

• The condition of the silent blocks (anti-vibration mounts).

• Tightening the electrical connections .

• The proper functioning of the outdoor temperature sensor .

Every detail counts to ensure lasting performance, especially during Quebec's frequent climatic variations.

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Return to comfort and customer satisfaction

A few minutes after the repair, the customer could see the difference: fresh air was circulating throughout the house again , the operating noise was smooth and constant, and the power consumption had normalized.
We took the time to explain the importance of annual preventative maintenance , including checking the capacitor and cleaning the outdoor coil before each warm season.

Thanks to this transparent and rigorous approach, the Sainte-Thérèse client has regained confidence in its Gree system—and the peace of mind of knowing that its equipment is in good hands.

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Why choose AirGreen for your Gree heat pump repairs?

AirGreen is a certified Gree distributor and installer in Greater Montreal. Our expertise covers the repair, maintenance, and installation of all Gree wall-mounted and multi-zone heat pump lines .
Using our services means benefiting from:

• Certified technicians trained directly on Gree products.

• Genuine parts that meet safety and performance standards.

• Fast and accurate diagnosis , without unnecessary replacement.

• Professional service in Montreal, Laval, Longueuil, on the North Shore and the South Shore .

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Summary of the intervention

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Simple repair, lasting comfort

Every AirGreen intervention is based on the same philosophy: diagnose accurately, repair rigorously and prevent future breakdowns .
Thanks to our expertise, this Gree heat pump in Sainte-Thérèse is ready to face several additional seasons, while offering the customer exceptional energy efficiency and comfort.