Preventive maintenance that avoids many problems
At AirGreen , we know that regular maintenance on a wall-mounted heat pump can make all the difference between continued comfort and a costly breakdown. Recently, we received a service call in Sainte-Dorothée, Laval , for a Gree wall-mounted heat pump whose performance seemed to have decreased after the winter. The owner, concerned about preserving his investment, wanted a complete inspection before the warm season .
Context of the intervention
The outdoor unit was installed high up, securely attached to the wall above a secondary roof. The client had taken care to cover it with a protective cover during the winter, a good practice which, if not accompanied by proper cleaning, can sometimes trap moisture and dust. Upon arrival, we noticed an accumulation of debris and fine dust on the condenser , limiting the air circulation essential for proper heat exchange.
Initial diagnosis
After removing the cover, our technician carried out a series of checks:
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Refrigerant system pressures and evaporating temperatures.
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Integrity of the condenser fins and the outdoor fan.
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Condition of the condensate drain.
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Operation of the compressor and start relay.
The readings showed a slight overpressure of the R32 refrigerant gas , often caused by a partially blocked condenser. No signs of leakage were detected, confirming an airflow problem rather than a mechanical issue.
The stages of the interview
Our intervention took place in three stages:
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Deep cleaning of the outdoor condenser
We applied a biodegradable cleaner specifically designed for HVAC coils, followed by a low-pressure rinse to remove dirt lodged between the fins without risking warping them. -
Checking the wiring and drain
A slightly stretched power cable was repositioned to reduce mechanical stress, and the condensate drain pipe was cleared to prevent any accumulation of stagnant water. -
Full performance test
After restarting, the heat pump was tested in both its heating and cooling modes. The blowing temperatures returned to the manufacturer's nominal values, confirming the return to optimal performance .
Results and recommendations
The owner immediately noticed an improvement in blowing power and a decrease in outside noise . We explained to him the importance of removing the cover at the end of winter and performing preventative cleaning in the spring. Annual maintenance not only helps maintain energy performance , but also extends the life of the compressor .
AirGreen expertise at your service
This type of service reflects our ongoing commitment to providing professional, accurate, and sustainable HVAC service in Laval and throughout Greater Montreal. Our RBQ and CCQ certified technicians are trained to work on all brands— Gree, Sharp, Midea, Fujitsu, Bosch, Lennox, Trane , and many others.
We always take a preventative approach : before a breakdown occurs, we detect warning signs—unusual noise, reduced performance, increased consumption, icing on the pipes, or the smell of dust when restarting.
Preventive maintenance or repair?
A well-maintained Gree heat pump retains up to 95% of its energy efficiency after 10 years of use. However, neglected maintenance can lead to:
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compressor overload ,
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an increase in electricity consumption ,
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and, in the long term, electronic card or fan failures .
This is why, at AirGreen, we recommend:
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A complete annual cleaning of the condenser and indoor unit;
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A refrigerant check every two years;
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A visual inspection after each winter to ensure that no ice or excessive moisture has accumulated around the unit.
Customer Testimonial
The client from Sainte-Dorothée told us:
“I didn't think a simple cleaning could make such a difference. The air is fresher, and the noise from the unit is completely gone.”
A simple comment, but revealing of the importance of professional HVAC maintenance .
Conclusion
The service call to Sainte-Dorothée is a good example of our philosophy: anticipate rather than repair . By intervening before a major problem appeared, we allowed the customer to extend the life of their system and avoid significant costs.
At AirGreen, we put our technical expertise, our rigor and our attention to detail to work to ensure the comfort of every home, in Laval and elsewhere in Greater Montreal.
Is your Gree heat pump showing signs of fatigue?
Contact AirGreen – Heat Pumps, Air Conditioning & Heating , your HVAC partner in Laval, Montreal, Longueuil, on the North Shore and the South Shore.