A service call in a modern building in Outremont
At AirGreen , we are regularly called upon to work in modern buildings and condos in the Outremont district of Montreal. That day, a client contacted us about a performance issue with his SlimAir Technologies wall-mounted heat pump , a compact system installed on a narrow balcony. The unit, although new, had been unable to heat his home efficiently for several days.
The customer noticed that the heat pump seemed to be working—the fan was running, the compressor was kicking on—but the indoor temperature wasn't rising. This is a common occurrence during sudden changes in outdoor temperature, especially when a slight leak or pressure imbalance develops in the refrigeration circuit.
On-site diagnosis: partial loss of R-410A refrigerant
Upon our arrival, we carried out a complete inspection of the SlimAir condenser installed on the balcony. The unit, although visually well maintained, nevertheless presented a telltale sign: a slight accumulation of frost on the suction line. This sign, often discreet, betrays abnormally low pressure in the refrigerant circuit .
Our technicians connected their digital pressure gauges to confirm the suspicion: the pressure was indeed below the nominal values recommended by the manufacturer SlimAir.
After a careful search, using an electronic detector, we located a micro-leak at the Schrader connector , a small brass joint used for pressure measurements.
Steps of repair and recommissioning
Once the leak was identified, our team followed a rigorous protocol:
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Safe recovery of residual refrigerant using a certified recovery station.
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Replacement of the Schrader connector and sealing cap.
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Nitrogen pressure test to ensure complete circuit integrity.
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Complete vacuum to remove any moisture or traces of air.
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Accurate recharge of the system with R-410A , according to SlimAir specifications.
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Checking temperatures and pressures to confirm optimal performance.
The result was immediate: the heat pump resumed a stable heating cycle, and the blown air displayed a temperature of more than 38°C , proof of an efficient compressor and a restored circuit.
A SlimAir heat pump: compact, efficient, but sensitive to maintenance
SlimAir Technologies systems are appreciated for their compact size and low noise level, making them ideal for Montreal condos and apartments. However, their compact design makes them more susceptible to malfunctions if maintenance is neglected.
Our technicians recommend:
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An annual maintenance before winter to check the refrigerant charge and the good condition of the connections.
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Cleaning the condenser to remove dust and fine particles accumulated on the fins.
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An inspection of the drains and the defrost sensor , two elements often overlooked.
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A periodic leak check , especially for units exposed to repeated freeze/thaw cycles.
In the case of our client in Outremont, a minor leak detected early prevented much more costly repairs in the long run.
Recognized HVAC expertise in the greater Montreal area
This type of intervention clearly illustrates our expertise: precise diagnostics , repairs that comply with environmental standards and transparent communication with the customer at every stage.
We work every week in Montreal, Laval, Longueuil, on the North Shore and the South Shore , on various brands such as SlimAir, Gree, Fujitsu, Sharp, Midea, Daikin and Goodman .
Our customers especially appreciate our prompt service and attention to detail. After the repair, we provided the owner with a complete maintenance report , including measured pressures, discharge temperatures, the exact amount of refrigerant added, and recommendations for the next inspection.
Conclusion
This SlimAir heat pump repair in Outremont once again demonstrates the importance of regular monitoring of your HVAC system.
Thanks to our intervention, comfort was restored, performance optimized and the system's lifespan extended.
At AirGreen , we guarantee reliable, safe and long-lasting repairs , supported by qualified technicians and state-of-the-art equipment.