A quick service call for restored comfort in Ville Mont-Royal
At AirGreen , every service call is an opportunity to revive an HVAC system that has lost its efficiency. This time, our team visited a beautiful apartment in Ville Mont-Royal where a Sharp wall-mounted air conditioner was showing obvious signs of fatigue: low airflow, unstable temperature, and a slight odor at startup.
The customer, who has been using his unit for over ten years, explained that the air conditioner had been working intermittently for several weeks, particularly on hot September days. This is a common problem with older models, but requires careful diagnosis before any repairs are undertaken.
Initial diagnosis: an aging but robust indoor unit
Upon arrival, we found a Sharp wall unit from the Whisper range , a model renowned for its durability but which, like any air conditioning system, requires regular maintenance.
The device was installed high above a home workspace. The positioning was correct, but dust accumulated on the fan blades and the dirty air sensor already explained part of the symptoms.
Our technicians have undertaken the following checks:
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Measurement of the blowing temperature to assess the cooling efficiency.
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Inspection of filters and coils using a thermal endoscope.
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Condensate and drain control , often responsible for odors and internal leaks.
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Electrical test on the main board to detect any overvoltage or relay failure.
The verdict: An aging control board combined with a seized interior fan , reducing airflow and causing erratic startup.
On-site repair: precision and rigor signed AirGreen
Using our mobile inventory, we replaced the fan motor with a genuine Sharp compatible model and cleaned the circuit board module after completely removing the front panel. A thorough cleaning of the internal coil was also performed to remove accumulated dust.
Our technicians then:
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Reset the control board and reprogrammed the operating parameters.
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Tested the complete cooling cycle , measuring the refrigeration circuit pressures.
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Checked the return air temperature , confirming an optimal difference of 10°C between inlet and outlet.
After an hour of testing, the Sharp wall-mounted air conditioner was working perfectly again, providing a constant, quiet, and cool airflow.
Personalized maintenance advice
Before leaving the premises, we took the time to explain to the customer how to extend the life of his device:
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Clean air filters every 4 to 6 weeks during the summer.
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Avoid obstructing airflow with furniture or curtains.
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Have the refrigerant pressure checked every two years.
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Schedule a complete annual maintenance before the start of the warm season.
We also mentioned that after more than ten years of service, it would be wise to consider upgrading to a more environmentally friendly and energy-efficient R-32 refrigerant model , especially in the context of the subsidies available in Quebec for the replacement of older HVAC units.
Result: efficiency restored and customer satisfied
Thanks to this targeted repair , the device regained its full performance without requiring a complete replacement. The customer immediately noticed the difference: fresher, more stable air and a significant reduction in operating noise.
At AirGreen , we believe that every HVAC system deserves a second life, especially when it comes to a reliable unit like those from the Sharp brand. Our approach combines rigorous diagnosis , transparency and sustainable interventions , throughout Montreal , Laval , Longueuil , on the North Shore and the South Shore .
In summary:
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Brand: Sharp
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Type: Wall-mounted air conditioner
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Location: Town of Mount Royal (Montreal)
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Problem: Faulty control board and indoor fan
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Solution: Replace the motor, clean it thoroughly, reset the system
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Result: Restored airflow, quiet operation and optimal comfort
At AirGreen , every Sharp wall-mounted air conditioner repair is a promise kept: to get your comfort back up and running, no matter the age of your unit.