Repair of a Hexzair wall-mounted heat pump in Chomedey

When a refrigerant recharge brings a Hexzair heat pump back to life

At AirGreen , we were recently called for a Hexzair wall-mounted heat pump repair in the Chomedey district of Laval . The customer contacted us after noticing a gradual decline in the performance of their unit: the heat pump was no longer cooling efficiently, even at full power. This is a common problem in residential settings, often linked to a refrigerant leak .

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Precise on-site diagnosis

Upon arrival, our technician performed a complete inspection of the Hexzair system . The outdoor unit, installed on a metal base, showed signs of wear on the service connections . Using our dual gauge manifold , we measured the pressures and confirmed an abnormally low suction pressure , typical of a lack of refrigerant.

A leak test was then carried out using nitrogen, followed by a run through the electronic leak detector . The cause was quickly identified: a slightly porous seal at the flare connection on the liquid line. This type of leak, minimal but continuous, leads to a significant loss of energy efficiency in the long term.

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System repair and upgrade

Once the leak was located, our technician:

• Replaced the flare joint with a new model made of high pressure annealed copper.

• Cleaned and tightened fittings to Hexzair specifications.

• Pulled a full vacuum on the system for over 30 minutes to remove all moisture and impurities.

• Performed a full recharge of R410A refrigerant , in accordance with the original capacity of the system.

The gas cylinder was weighed on a digital scale to ensure perfect dosage accuracy. All under control of high and low pressures for optimal balancing.

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Performance verification and results

After recharging, pressure and temperature measurements showed performance returned to Hexzair standards:

• Stable discharge temperature at 50°C

• Balanced suction pressure

• Blown air temperature at 8°C in air conditioning mode

Once the unit was tested, the customer immediately noted a noticeable improvement in interior comfort , and above all, quiet and smooth operation, without excessive vibrations or excess power consumption.

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Maintenance advice given to the customer

We took advantage of the intervention to advise the client on some good practices:

• Clean filters every 3 to 4 weeks.

• Have the refrigerant pressure checked at least once every two years.

• Avoid blocking outdoor ventilation with plants or objects.

• If performance drops, contact a certified technician rather than waiting for a complete breakdown.

These simple actions can extend the lifespan of a wall-mounted heat pump and ensure optimal energy efficiency.

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AirGreen: HVAC expertise in Laval and throughout Greater Montreal

This intervention in Chomedey perfectly illustrates our mission at AirGreen: to offer precise, fast and durable HVAC repair service , regardless of the model or brand. Our technicians are trained on Hexzair, Midea, Fujitsu, Sharp, Gree systems , and many others. We operate throughout Montreal, Laval, Longueuil, on the North Shore and the South Shore , with the same commitment to excellence and transparency.

Is your Hexzair wall-mounted heat pump showing signs of weakness? Don't delay in calling our team. A simple leak can cost you dearly in the long run in terms of electricity consumption and performance. At AirGreen, we restore your HVAC system's efficiency—and your comfort.

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AirGreen — Air conditioning and heating experts in Laval, Montreal and throughout Quebec.
For fast and professional service, contact us today.