A fast and efficient service call on the South Shore
At AirGreen , we work daily across Montreal's South Shore to ensure the proper functioning of residential HVAC systems. Recently, our team was called to Brossard for a problem with a Friedrich wall-mounted heat pump that was no longer adequately cooling a customer's home. The intervention allowed us to diagnose a typical failure related to ice buildup and a faulty temperature sensor—a common occurrence at the end of the summer season.
Initial diagnosis: declining performance and idling fan
The customer contacted us after noticing that their heat pump was blowing lukewarm air despite a temperature set at 20°C. Outside, the Friedrich unit appeared to be working, but the condenser fan was spinning intermittently. This type of symptom indicated either a weakened start capacitor or a faulty control board .
Before any manipulation, our RBQ and CCQ certified technician carried out basic electrical checks: stable supply voltage, intact fuses, no short circuits.
Thorough Inspection: The Real Cause of the Problem
Upon removing the protective panel, he noticed frost buildup on the coil and a frosted temperature sensor . This prevents the heat pump from properly switching between heating and cooling cycles.
The faulty sensor was sending false information to the control board, keeping the compressor running for too long. As a result, the system would overload , and the internal protection would temporarily shut off the fan to prevent overheating.
Intervention: sensor replacement and complete maintenance
We replaced the evaporator temperature sensor with a genuine Friedrich part. A complete cleaning of the coil and fan was then performed with a biodegradable product approved by Environment Canada .
The operation continued by checking the condensate drain and measuring the refrigerant pressure . No leaks were detected, confirming that the problem was solely with the sensor. After restarting, the supply air temperature returned to 9°C in air conditioning mode—a sign of optimal performance.
AirGreen Expertise: a preventive approach above all
Every repair carried out by AirGreen is also an opportunity to prevent future breakdowns. In this case, we recommended a complete annual maintenance service to the customer, including:
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cleaning the filters and the internal exchanger;
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inspection of electrical connections;
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checking refrigerant pressures;
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and testing the temperature probes.
This type of maintenance, offered at a preferential rate for our customers in Brossard, Saint-Lambert and Longueuil , extends the lifespan of Friedrich systems and considerably reduces the risk of breakdown during a heatwave.
Result: comfort restored and consumption optimized
Upon completion of the repair, the Friedrich wall-mounted heat pump returned to quiet and stable operation. The customer immediately noticed a return to comfort and improved energy efficiency. According to our measurements, instantaneous consumption decreased by 18% , proving that the sensor replacement and cleaning restored the unit to its original performance.
Why choose AirGreen for your wall-mounted heat pump repairs in Brossard?
At AirGreen, we make it a point of honor to offer a fast, professional and sustainable service .
Our teams, based in Montreal and on the South Shore , are trained to work on all brands: Friedrich, Gree, Midea, Fujitsu, Sharp, Lennox, Bosch , and many others.
Our technicians are certified by the Régie du bâtiment du Québec (RBQ) and the Commission de la construction du Québec (CCQ) , guaranteeing work that meets the strictest standards in the HVAC sector.
Our promise:
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Clear and detailed diagnosis;
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Repair with original parts;
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Warranty on labor and parts;
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Rapid intervention throughout the South Shore (Brossard, La Prairie, Saint-Lambert, Sainte-Julie, etc.).
An exemplary repair, a relationship of trust
This intervention clearly illustrates our commitment: each service call is handled with rigor, transparency and efficiency.
The Brossard client, relieved to have a comfortable home before the next heat wave, has since subscribed to our AirGreen Preventative Maintenance Program—a wise choice to ensure the long-term reliability of any residential HVAC system.
Warning:
Work on HVAC systems should only be performed by certified technicians. Improper handling of electrical components or refrigerant can result in shock or permanent damage to the unit.