A typical service call in the heat
At AirGreen , we know that a broken wall-mounted air conditioner in the middle of a heatwave can quickly turn a home's comfort into a furnace. This is exactly what happened in a residence in Sainte-Julie , on the South Shore of Montreal , where we were urgently called to intervene on a Carrier wall-mounted system showing signs of weakness.
The customer contacted us after noticing that their unit was blowing lukewarm air despite the remote being set to 20°C. The unit, installed in an open-plan space, was struggling to maintain the temperature, which directly affected the comfort of the home.
Accurate diagnosis: beyond simple loss of cold
Upon our arrival, our certified technician performed a complete inspection of the system . The initial findings revealed:
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A build-up of dust in the filter and on the evaporator;
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Low airflow , a sign of possible fan fouling;
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Abnormally low refrigerant pressure , indicating a micro-leak in the circuit.
We then checked the temperature sensor and the electronic card : the measurements were stable, which allowed us to rule out an electronic fault. Attention was therefore focused on the refrigeration circuit .
Intervention: rigor and precision signed AirGreen
The Carrier unit in question was part of a wall-mounted series typical of South Shore residences. After confirming the leak with a nitrogen pressure test , our team:
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Locate the leak using an electronic detector;
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Repaired the defective copper tube using silver solder;
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Performed a complete vacuum to remove all traces of moisture;
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Recharged the system with R-410A refrigerant according to the manufacturer's specifications;
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Checked operating pressures and blowing temperature to ensure optimal performance.
After these steps, the system returned to its original performance: blowing at 9°C and stable pressure on both sides of the circuit.
Result: comfort restored and efficiency restored
A few minutes after the service was restarted, the difference was palpable: the ambient temperature quickly dropped, and the customer was able to regain the comfort he was looking for .
We took the opportunity to carry out a complete cleaning of the filter and turbine , and to remind the customer of the importance of annual maintenance .
Our recommendations:
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Clean the filters every two months;
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Check the condition of the condensate drains to avoid overflows;
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Schedule a professional inspection before each summer to prevent leaks and extend the life of the unit.
Why Carrier wall systems remain reliable
Carrier wall-mounted air conditioners are renowned for their robustness and durability. However, like all heating, ventilation, and air conditioning (HVAC) equipment, they require regular maintenance . Even a small leak can cause a significant loss of efficiency and an increase in electricity consumption.
Our technicians, trained on all major brands (Carrier, Gree, Fujitsu, Sharp, Midea, Goodman, etc.) , have the necessary tools to intervene quickly, whether it is:
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From a compressor problem ;
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From an electronic card failure ;
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From a refrigerant leak ;
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From a blockage of the interior fan .
AirGreen: your HVAC expert in Sainte-Julie and throughout the South Shore
We operate daily in Sainte-Julie, Boucherville, Brossard, Saint-Bruno and Candiac , for all types of HVAC repairs : wall-mounted air conditioners, MultiZone heat pumps, central systems, PTAC, air exchangers and more.
Every service call is an opportunity for us to demonstrate our technical expertise and commitment to customer satisfaction . Through our methodical approach, we ensure lasting repairs and optimal performance for every system.
In summary
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Problem : Carrier wall-mounted air conditioner blowing warm air.
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Cause : Microleak in the refrigerant circuit.
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Solution : Repair the tube, recharge with R-410A, complete cleaning.
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Result : Effective cooling, comfort restored.
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Location : Sainte-Julie (South Shore).
At AirGreen , we do more than just repair appliances: we restore our customers' peace of mind.