When a Friedrich unit stops cooling in the middle of a Montreal summer
At AirGreen , we work every day in Montreal homes and condos to diagnose and repair HVAC (heating, ventilation, and air conditioning) systems of all brands. Recently, our team was called to Côte-des-Neiges , a modern apartment where a Friedrich wall-mounted air conditioner was no longer producing cold air, even though the outdoor compressor was running.
The context of the intervention
The client, a professional who often works from home, contacted us after several days of persistent heat. His Friedrich wall unit, installed for approximately eight years, was emitting lukewarm air, with no apparent errors on the remote control. This situation, typical of a lack of refrigerant or a faulty temperature sensor, required a complete diagnostic.
Upon our arrival, our certified technician ensured that the electrical system and outdoor compressor were functioning properly. Using our measuring tools, we noted that the refrigerant gas pressure was abnormally low—a clear sign of a microleak in the system.
Accurate diagnosis and complete repair
Step 1: Inspection of the refrigeration circuit
We removed the front cover and inspected the indoor unit's coils. A thin trace of oil confirmed a microleak at the copper tube solder joint , likely due to slight vibration accumulated over the years. This type of leak is common in older installations where the fasteners vibrate slightly with each compressor cycle.
Step 2: Repair and gas refill
After locating the leak, we:
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Drained the circuit.
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Cleaned the damaged section.
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Re-solder with high temperature silver to ensure a lasting seal.
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Pulled a full vacuum to -500 microns using a professional vacuum pump.
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Recharged the system with R-410A , according to the manufacturer's specifications Friedrich.
Once the system was restarted, we measured the blowing temperature: a difference of 11°C with the ambient air, indicating optimal performance.
Results and customer satisfaction
In less than two hours, comfort was fully restored. The client, relieved to be able to work again in a cool room, particularly appreciated our methodical approach and transparent monitoring of each step of the repair. We also recommended annual preventative maintenance , essential to extend the life of any wall-mounted HVAC system.
The importance of regular maintenance
A refrigerant leak or reduced performance never occurs overnight. In most cases, these problems result from:
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clogged filters that force the system to overheat;
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dirty coils reducing heat exchange;
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undamped vibrations creating cracks in the solders.
At AirGreen, we recommend a complete cleaning and pressure check every spring to avoid summer breakdowns. Our technicians respond quickly in Montreal, Laval, Longueuil, the North Shore, and the South Shore , with replacement parts for major brands like Friedrich, Gree, Sharp, Fujitsu, Midea, and more.
Why choose AirGreen for your wall-mounted air conditioner repair in Montreal?
Our customers trust us for three simple reasons:
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Transparency and precise diagnosis : we explain each step before intervening.
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Certified and trained technicians on all recognized brands.
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Fast service throughout Greater Montreal, often the same day.
Whether it's a minor breakdown or a circuit board replacement, we'll ensure your Friedrich system or any other wall-mounted air conditioner returns to its original performance.
Comfort restored, guaranteed by AirGreen
This repair in Côte-des-Neiges is a perfect example of our mission: to provide professional, reliable, and local HVAC service , always with the same technical rigor and human approach. Every service call is an opportunity for us to demonstrate that excellence in air conditioning is not only a matter of technology, but also of expertise and trust built in the field.
AirGreen : your trusted partner for Friedrich wall-mounted air conditioner repairs in Montreal, Laval, Longueuil, on the North Shore and the South Shore.