Rapid intervention for a Trane wall-mounted air conditioner with poor performance
At AirGreen , we were recently called to the Rosemont–La Petite-Patrie neighborhood of Montreal for a problem with a Trane wall-mounted air conditioner that had become almost non-existent. The customer, who regularly worked from home, noticed that his wall-mounted unit was only blowing lukewarm air, even in maximum cooling mode. Our team handled this service call with the clear objective: to identify the cause of the breakdown and quickly restore the HVAC system's performance .
Initial diagnosis: a problem with refrigerant pressure and accumulated maintenance
Upon arrival at the site, our technicians noticed that the unit was a Trane Comfort Series wall-mounted model , installed for over ten years. The first telltale sign was visible dirt on the suction grille and a faint airflow .
We carried out a complete diagnosis , including:
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Checking the pressure of R410A refrigerant .
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Inspect the evaporator coil for deposits or frost.
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Temperature sensor and blower motor check.
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Evaluation of the electronic control board .
The measurements quickly confirmed a significant drop in refrigerant pressure , indicating a micro-leak in the circuit. In addition, the unit was suffering from severe fouling due to overly spaced maintenance, reducing the system's heat exchange capacity.
System repair and upgrade
To correct the situation, our AirGreen technician undertook a series of targeted actions:
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Leak location using an electronic detector and UV tracer inspection.
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Sealing the leak using a specialized product compatible with the closed circuit of R410A refrigerant.
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Complete refrigerant recharge according to Trane manufacturer's specifications.
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Deep cleaning of the evaporator coil and fan using a biodegradable cleaning agent.
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Disinfection of the condensate drain to prevent any risk of future obstruction.
Once these steps were completed, we performed a full performance test . The system returned to stable pressure, strong airflow, and a blowing temperature within factory settings.
Result: restored performance and better indoor air quality
After the repair, the customer's Trane wall-mounted air conditioner was operating at full capacity again. The outgoing air measured 10°C cooler than the ambient temperature, indicating optimal performance.
The operating noise, previously higher due to accumulated dirt, has also decreased significantly. The client immediately noticed an improvement in thermal comfort and temperature stability in the room, essential for his workspace.
Preventive maintenance: an essential habit
As with any wall-mounted HVAC system , a breakdown of this type can be avoided through regular maintenance. Our AirGreen experts recommended the following measures to the client:
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Clean the filters at least once a month during the summer.
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Professional annual inspection , including checking the refrigerant and electrical system.
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Cleaning the coil and fan at the end of each warm season.
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Condensate drain control to prevent wall water leaks.
These simple but essential interventions not only ensure long-lasting performance , but also a reduction in energy consumption .
The AirGreen approach: expertise, rigor and proximity
Our interventions in residential neighborhoods like Rosemont–La Petite-Patrie demonstrate our commitment to providing fast, professional, and local service . Every service call is handled with the same rigor, whether it's a wall-mounted air conditioner, a heat pump, or a multi-zone system .
At AirGreen, we combine advanced technical diagnostics , certified replacement parts , and transparent customer service to guarantee the satisfaction of every customer in Montreal, Laval, Longueuil, on the North Shore and the South Shore .
A sustainable repair by AirGreen
Thanks to our intervention, the Trane wall-mounted air conditioner in Rosemont–La Petite-Patrie has been given a new lease of life. This type of repair demonstrates that properly performed professional maintenance can extend the life of a unit by several years while maintaining its energy efficiency.
Our client thus avoided a complete replacement, while finding a fresh, quiet and pleasant environment.