A performance problem in the middle of winter
At AirGreen , we often receive calls from customers surprised to discover that their wall-mounted air conditioner also serves as a heater thanks to its heat pump function . This is precisely the case with this Panasonic system installed in a house in Boisbriand , on the North Shore of Montreal. The customer contacted us after noticing that the indoor unit was blowing warm air instead of hot air, and that the room temperature was no longer rising, despite a properly adjusted thermostat.
Diagnosis: lack of heat due to neglected maintenance
Upon arriving on site, our technician performed a complete inspection of the HVAC system . The Panasonic wall unit, installed in the living room, showed several signs of stress:
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The air filters were heavily clogged.
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The outgoing airflow was weak.
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The outdoor unit had ice buildup .
Using our measuring instruments, we confirmed a pressure imbalance in the refrigeration circuit , probably due to a partial obstruction in the exchanger or a slight refrigerant leak .
Steps of repair
To restore the system, our team carried out several methodical interventions:
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Complete cleaning of the indoor unit — dismantling the cover, washing the coils and thoroughly dusting the filters.
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Checking electrical connections and temperature probes.
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Defrosting the outdoor unit and controlling the refrigerant charge.
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Partial recharge in R410A , carried out according to the pressures recommended by the manufacturer Panasonic.
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Final test to confirm stable performance and optimal temperature blowing .
The customer immediately noticed the difference: the room temperature rose by 3°C in less than 15 minutes after restarting.
The Importance of Preventative Maintenance on Wall Units
Wall-mounted heat pump air conditioners like this Panasonic are very efficient, but require maintenance. Here are some tips we always share with our customers:
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Clean the air filters every two months , especially during periods of heavy use.
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Regularly check that the outdoor unit is not blocked by snow or ice.
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Have an annual professional maintenance performed to check the pressure, efficiency and cleanliness of the coils.
Simple maintenance can prevent costly breakdowns and extend the life of the system by years.
AirGreen expertise: rigor, transparency and local service
Our team is proud to offer a complete HVAC repair service in Montreal, Laval, Longueuil, the North Shore and the South Shore . In this specific case in Boisbriand , our technician's professionalism helped avoid premature replacement of the heat pump and restore home comfort without delay.
At AirGreen, each intervention follows a proven process:
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Accurate diagnosis with professional measuring tools.
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Clear communication with the customer before any repair.
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Parts and refrigerants comply with Canadian standards.
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Warranty on all repairs carried out.
A comfortable home again
After the repair, the Panasonic wall unit operated quietly, ensuring consistent heat and optimal energy efficiency . The customer opted to subscribe to our AirGreen annual maintenance program , guaranteeing regular monitoring and personalized maintenance reminders.
This intervention perfectly illustrates our mission: to ensure the lasting comfort of Quebec homes through reliable, professional HVAC services adapted to each season.