Cooling failure in the middle of the hot season in Blainville
A homeowner in Blainville , on Montreal's North Shore , contacted us after noticing that his Tempstar central heat pump was no longer cooling his home properly. Despite the compressor starting normally, the air blowing through the ducts remained lukewarm , a typical symptom of a refrigeration or air circulation problem.
At AirGreen , our priority is always to intervene quickly to restore comfort, especially during the first spring heat waves.
Diagnosis: loss of performance due to lack of refrigeration pressure
Upon arrival, we conducted a complete analysis of the HVAC system . The outdoor condenser—a Tempstar unit mounted on a metal wall bracket for better airflow—appeared clean and well-installed. However, the compressor noise level was slightly higher than normal, a sign often associated with low suction pressure .
After checking the pressures and temperatures, our technician confirmed a partial loss of R-410A refrigerant . This slow leak, invisible to the naked eye, significantly reduced the heat pump's ability to transfer heat.
We then used an electronic leak detector and a soap solution to locate the weak point in the system: a micro-leak at the brazed connection on the suction line .
Diagnostic steps:
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Complete visual inspection of the outdoor unit and refrigeration connections.
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Measurement of suction and discharge pressures using digital pressure gauges.
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Compressor current analysis to verify proper motor operation.
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Leak detection with electronic detector .
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Leak test after repair for final validation.
Intervention: soldering, recharging and calibration of the system
Once the leak was located, our technician performed copper-phosphorus brazing to seal the damaged area. After controlled cooling, we pulled a full vacuum on the circuit to remove any traces of moisture before recharging.
The R-410A recharge was then carried out according to the manufacturer's specifications Tempstar, with precise adjustment to the nearest gram to ensure optimal performance.
We took advantage of the intervention to:
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Clean the condenser fins using a gentle spray and a biodegradable cleaner.
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Check the condition of the main contactor and capacitor .
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Replace the insulating sheath on the refrigeration line exposed to the sun.
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Test the complete heating and cooling cycle .
The system has regained balanced pressures , a compliant blowing temperature and normal electrical consumption .
Customer experience: comfort restored, confidence strengthened
The owner, concerned about a costly replacement, was reassured by our transparent and methodical approach . We explained the origin of the problem—a micro-leak due to repeated slight vibration—and suggested an annual preventive inspection to prevent any recurrence.
At the end of the service, the customer immediately noticed the return of fresh and stable air to all rooms of the house.
A simple corrective maintenance allowed him to extend the life of his Tempstar heat pump while optimizing its energy efficiency.
Why Choose AirGreen for Your HVAC Repairs in Blainville and Beyond
At AirGreen , we combine technical expertise , state-of-the-art tools and impeccable customer service to guarantee long-lasting repairs on all types of HVAC equipment: heat pumps, wall-mounted air conditioners, central systems, air exchangers and more .
Each intervention follows a rigorous process:
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Precise and documented diagnosis .
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Exclusive use of compatible parts and certified refrigerants.
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Full compliance with safety and energy efficiency standards .
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Personalized advice to maximize system performance.
Our teams serve Montreal, Laval, Longueuil, the North Shore and the South Shore , always with the same rigor and the same passion for a job well done.
Technical summary of the intervention
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Equipment type: Central heat pump
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Brand: Tempstar
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Problem: R-410A refrigerant leak causing loss of performance
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Solution: Repair by soldering, leak test, complete recharge
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Result: Restored efficiency, immediate comfort, stabilized consumption
Thanks to this repair carried out in Blainville , the customer's Tempstar heat pump now operates like new. Concrete proof that preventive maintenance and specialized AirGreen repairs are the key to lasting comfort throughout the seasons.