A quick service call for restored comfort
At AirGreen , we were recently contacted by a client in Montreal's Côte-des-Neiges–Notre-Dame-de-Grâce neighborhood whose Sharp wall-mounted air conditioner was showing signs of malfunction. During a hot spell, the unit refused to effectively cool the main room of his condo. Upon our arrival, our team implemented a comprehensive HVAC diagnostic and repair procedure to restore the client's comfort without delay.
Diagnosis: loss of performance and sensor anomaly
The customer noticed that the blown air remained lukewarm, despite the compressor apparently being in operation. We began with a complete inspection of the Sharp wall system , checking the refrigerant pressure , the indoor temperature sensor , and the electronic control board .
Quickly, our certified technician identified two distinct problems:
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A slightly insufficient refrigerant charge , causing a drop in efficiency.
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A faulty temperature sensor , distorting the ambient temperature reading and preventing the compressor from regulating the cycle correctly.
These combined anomalies explained the poor performance and the impression of lukewarm air reported by the customer.
Repair: AirGreen precision and reliability
After explaining the situation to the customer, we carried out a partial draining of the circuit and a complete recharge with R410A refrigerant , respecting the pressures and temperatures recommended by the manufacturer Sharp.
Next, our team replaced the faulty sensor with a compatible OEM part and then performed a full functional test to ensure the system was responding properly to the cooling demand.
Each step was carried out in compliance with RBQ and CCQ standards , guaranteeing a safe and sustainable intervention.
Result: restored performance and satisfied customer
Once the repair was complete, the Sharp wall-mounted air conditioner resumed optimal operation. The cool airflow was constant, and the indoor unit's noise level returned to normal. The customer immediately noticed an effective drop in temperature in his main room, with comfort restored in less than an hour.
We also advised the customer to perform annual preventative maintenance , including complete cleaning of the filters , checking the gas pressure and disinfecting the evaporator coil , to prevent any future performance degradation.
AirGreen expertise: rigor and proximity in Montreal
This type of intervention perfectly illustrates AirGreen's philosophy: a fast, professional and local service , adapted to the real needs of residents of Montreal, Laval, Longueuil, the North Shore and the South Shore .
Our technicians specialize in wall-mounted HVAC system repair and service all major brands— Sharp, Fujitsu, Gree, Midea, Lennox, Trane, Goodman , and many others—always providing an accurate diagnosis and a lasting solution .
We know that every breakdown is different. That's why our teams always prioritize a complete analysis before any repair , ensuring work meets the highest standards in the HVAC industry .
Tips to avoid a similar breakdown
To extend the life of your Sharp wall-mounted air conditioner, we recommend:
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An annual professional interview , ideally before the summer season.
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Regular cleaning of filters (every 4 to 6 weeks).
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A visual inspection of the condensate drain to prevent water leaks.
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Maintaining a clear distance around the indoor and outdoor unit , promoting good air circulation.
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Monitoring for unusual noises or sudden changes in performance.
These simple actions, combined with regular monitoring by our technicians, guarantee the reliability and longevity of your HVAC system.
Your comfort, our commitment
Whether you are in Montreal, Laval, Longueuil, on the North Shore or the South Shore , AirGreen remains your trusted partner for any repair of Sharp wall-mounted air conditioners or other residential HVAC systems.
Our mission is clear: to offer each customer a professional, transparent and sustainable service, in order to maximize the comfort of their home while optimizing the energy performance of their appliance.