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Réparation d’une thermopompe murale GE à Sainte-Julie
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Repair of a GE wall-mounted heat pump in Sainte-Julie

A service call in the heat of summer

When a resident of Sainte-Julie , on the South Shore of Montreal, contacted us about a GE wall-mounted heat pump failure , the outside temperature was approaching 32°C. The system, installed several years ago, was no longer blowing cold air despite the audible operation of the outdoor fan. At AirGreen , we know that a heat pump failure during a heatwave is not just an inconvenience: it's an emergency.

Fast and accurate diagnosis

Upon our arrival, our technician conducted a complete inspection of the outdoor unit—a GE wall-mounted heat pump equipped with an inverter compressor. Visually, the unit appeared to be in good condition, well-maintained, and securely mounted on anti-vibration wall brackets. However, the refrigerant discharge temperature was abnormally low, and no pressure variation was detected in the circuit.

The initial findings pointed to a lack of refrigerant , possibly caused by a micro-leak in the copper connection. We therefore proceeded to:

  • A nitrogen pressure check to confirm the presence of a leak;

  • Applying a detector solution to the flare joints;

  • The use of an electronic leak detector .

The test quickly revealed a minimal leak at the liquid side connection, probably due to insufficient tightening during a previous service.

Repair and recommissioning

Once the leak was identified, our technician took the following steps:

  1. Complete purging of residual fluid and recovery in accordance with current environmental standards.

  2. Replaced the flare joint and tightened to the exact torque recommended by GE.

  3. Extended pressure test (3 hours at 300 psi) to ensure complete leak-tightness.

  4. Deep vacuum to remove all traces of moisture.

  5. Recharge with R-410A refrigerant according to the exact charge specified by the manufacturer.

Once the system was powered back up, we observed immediate and stable cooling , with pressures within factory specifications. The customer noticed within minutes a constant return of cold air inside.

The special features of GE wall-mounted heat pumps

GE systems are known for their quietness , energy efficiency , and longevity . However, like any wall-mounted heat pump, they require regular maintenance to prevent:

  • Micro-leaks at flare fittings;

  • Condenser fouling ;

  • Electronic board problems related to overvoltage;

  • Ice blocks in winter, often caused by a lack of effective defrosting.

Our AirGreen technicians are trained on the specific features of GE ranges and use certified diagnostic tools to avoid any misinterpretation.

A well-designed installation for optimal performance

The outdoor installation, securely mounted on a vinyl wall with galvanized brackets and anti-vibration pads , fully complied with the recommended clearances . This type of mounting protects the heat pump against:

  • Snow accumulation;

  • Water splashes from the ground;

  • Excessive vibrations;

  • Premature corrosion of fasteners.

These often overlooked installation details directly contribute to compressor durability and stable energy efficiency .

AirGreen Tips to Extend the Life of a Wall-Mounted Heat Pump

To avoid similar failures in the future, we recommend that all owners of GE heat pumps—and other brands—follow a few simple rules:

  • Clean the internal filters every month during the warm season;

  • Have the pressures inspected at least once a year by a certified technician;

  • Check the cleanliness of the outdoor condenser and remove debris;

  • Avoid uncertified extension cords or power strips ;

  • Schedule preventative maintenance in the spring or fall .

These simple actions prevent loss of efficiency and ensure constant comfort, summer and winter.

Conclusion: comfort restored and customer reassured

Following the intervention, the client's GE wall-mounted heat pump was operating at full capacity again. Indoor comfort was immediately restored, and our Sainte-Julie client praised our team's speed and professionalism.

At AirGreen , we believe that reliable HVAC repair service is built on three pillars: accurate diagnosis , long-lasting response , and clear communication . This is what allows us to offer a high level of service throughout Montreal, Laval, Longueuil, the North Shore, and the South Shore .