A typical service call for a hot summer in Sainte-Julie
At AirGreen , we were recently called to intervene in Sainte-Julie , on the South Shore of Montreal , for a problem affecting a Midea wall-mounted air conditioner . This type of system, very common in single-family homes and duplexes in the region, is appreciated for its reliability and energy efficiency. However, like any heating, ventilation and air conditioning (HVAC) unit, it may require occasional maintenance to maintain its optimal performance.
The diagnosis: loss of performance and unusual noise
The customer contacted us after noticing that their air conditioner was no longer effectively cooling the ground floor rooms, while producing a metallic vibrating noise every time it was turned on. Upon our arrival, our certified technician conducted a complete inspection of the Midea outdoor condenser , installed against a red brick wall—a configuration typical of homes in Sainte-Julie.
Our initial observations revealed:
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A buildup of dust and pollen on the condenser coil, reducing heat exchange;
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A slightly loose front grille attachment , causing noise with each start cycle;
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Refrigerant pressure below the standard , a possible sign of a micro-leak in the circuit.
Repair steps: AirGreen precision and efficiency
1. Cleaning and maintaining the condenser
We began by thoroughly cleaning the condenser using a biodegradable product approved for HVAC systems. This step is essential to ensure optimal heat dissipation, especially during the summer.
2. Mechanical check and tightening
The anti-vibration mounts were checked and tightened. We also replaced the grille mounting bolts with a more robust stainless steel model to permanently eliminate the vibration noise reported by the customer.
3. Leak detection and repair
Using an electronic detector, we located a micro-leak at a flare connection in the refrigeration circuit. After purging the system, we resealed the connection, performed a nitrogen pressure test, and then recharged the system with R-32 refrigerant , in accordance with Midea specifications.
4. Performance tests
Once the repair was completed, we checked:
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Blown air temperature : 9°C lower than suction temperature, in accordance with standards;
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Noise level : reduced by 40%, measured at only 48 dB;
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Power consumption : stable and within the range expected for this model.
The Midea air conditioner has thus regained its full efficiency, guaranteeing optimal comfort for the Sainte-Julie family, even on the hottest days.
AirGreen know-how: maintenance and sustainability
Our interventions go far beyond simple repairs. We always take the time to explain to the customer:
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The importance of annual maintenance (cleaning coils, checking pressures, electrical inspection);
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Warning signs of a problem : noise, temperature variation, odor, excessive defrosting;
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AirGreen maintenance programs , which help avoid costly repairs in the long term.
This attention to detail is an integral part of our commitment to the quality and durability of the HVAC systems installed or maintained by our teams in Montreal, Laval, Longueuil, on the North Shore and the South Shore .
In conclusion: performance restored and customer satisfied
Thanks to our quick and methodical intervention, this Sainte-Julie customer's Midea wall-mounted air conditioner is now working like new. This case perfectly illustrates our expertise in residential HVAC repair , our technical rigor, and our commitment to providing a service that is both professional and human.
At AirGreen , every service call is an opportunity to demonstrate that our top priority remains the trust and comfort of our customers.
AirGreen – Your HVAC repair and maintenance expert in Montreal, Laval, Longueuil, North Shore and South Shore.