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Réparation d’un climatiseur mural North Cool à Laval
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North Cool wall-mounted air conditioner repair in Laval

A precision intervention by AirGreen

At AirGreen , every HVAC repair service call is an opportunity to demonstrate our expertise and commitment to quality. Recently, our team responded to a breakdown on a North Cool wall-mounted air conditioner installed on a red brick facade in Laval , in the Sainte-Dorothée district.

The unit, although compact and generally reliable, showed several signs of malfunction: unusual noise from the outdoor fan, loss of efficiency in air conditioning mode, and intermittent compressor shutdown . The customer, concerned about the drop in performance as hot days approached, contacted us for a quick and complete diagnosis .

Diagnosis: analyze before acting

Upon arrival, we performed a complete visual inspection of the outdoor condenser. Several points of attention were immediately noted:

  • Protective grille twisted and slightly clogged with debris, which may hinder air circulation.

  • Traces of oxidation on the electrical connection terminal.

  • Abnormally high noise level when starting the compressor.

Using our measuring instruments, we found that the refrigerant pressure was lower than the recommended standards for this type of unit. This suggested a micro-leak in the refrigeration circuit connections.

After nitrogen testing and application of a detector solution, the leak was located precisely on a slightly loose flare fitting , probably due to repeated vibrations.

Repair and recommissioning

Once the leak was confirmed, our certified technician undertook a complete repair of the connection :

  1. Purging of remaining refrigerant (in compliance with environmental standards).

  2. Re-brazing and tightening the fitting with a torque wrench.

  3. Leak test at 300 psi for 20 minutes to validate the repair.

  4. Complete vacuuming of the circuit to eliminate all moisture.

  5. R410A gas refill according to North Cool specifications.

Once the system was restored, the unit was powered back on. The customer immediately noticed the difference: smooth, quiet operation and even air conditioning throughout the house.

Technical details of the intervention

  • Equipment type : Wall-mounted air conditioner (mini-split)

  • Brand : North Cool

  • Estimated power : 12,000 BTU

  • Main problem : Loss of efficiency due to a micro-leak in the refrigeration circuit

  • Applied solution : Repair of the flare connection + refill of the refrigerant

  • Total service time : 1 hour 45 minutes

An AirGreen service is more than a repair

Beyond simply restarting the system, every AirGreen intervention includes a prevention component. Before leaving the premises, our technician:

  • Cleaned the condenser and removed debris around the unit.

  • Checked the electrical integrity of the compressor and fan .

  • Tested amperage consumption to ensure system stability.

  • Recommended annual maintenance to extend the life of the unit.

The customer also appreciated our personalized advice on optimal use of the air conditioner: maintaining a clearance of 30 cm around the unit, cleaning the interior filter every 3 weeks, and using “Eco” mode during extended absences.

Why choose AirGreen for your HVAC repairs in Laval

At AirGreen , we believe that quality HVAC service is based on three essential pillars:

  1. Rigorous Diagnosis – Our technicians don’t just fix the symptom: they identify the root cause.

  2. Complete transparency – The customer always receives a clear report of the work carried out and parts replaced.

  3. Durability – We favor certified repairs that comply with RBQ and CMMTQ standards, ensuring long-term performance and safety.

Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , our teams respond quickly to any problem with wall-mounted air conditioners, heat pumps or central systems .

Result: restored comfort and peace of mind

A few days after our visit, the customer called us back to thank us. His North Cool air conditioner was working perfectly, maintaining a stable temperature effortlessly. Thanks to our quick and precise intervention , he was able to avoid a complete breakdown and loss of refrigerant, while reducing his energy consumption.

This type of mission perfectly illustrates the AirGreen philosophy: intervene with rigor, repair with expertise and leave each customer fully satisfied.

AirGreen – HVAC system repair experts in Montreal, Laval, Longueuil, North Shore and South Shore.
We bring your air conditioners, heat pumps and ventilation systems back to life with the professionalism and passion that have made our reputation throughout Greater Montreal.