When performance and silence must go hand in hand
At AirGreen , we are often called upon to revive efficient HVAC systems that, after a few seasons, show signs of weakness. Recently, our team intervened in Sainte-Thérèse , on the North Shore of Montreal , to repair a Tosot wall-mounted heat pump that was no longer heating efficiently and was producing an unusual noise outside.
Precise diagnosis on the ground
The customer contacted us after noticing two major symptoms:
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a noticeable drop in heating performance on cold mornings;
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an abnormal vibration noise coming from the external compressor.
Upon our arrival, we carried out a complete analysis of the Tosot Inverter system , a model known for its energy efficiency and its ability to maintain a stable temperature even at low outdoor temperatures. Using our digital pressure gauges , we quickly detected a refrigerant pressure imbalance — a typical sign of an R410A gas microleak .
Technical intervention: rigor and precision
Our certified technician took the following steps:
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Complete visual inspection of the Tosot condenser : checking the fins, fan and compressor.
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Nitrogen leak test to precisely locate refrigerant loss.
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Repair of the leak located on a slightly porous solder.
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Complete draining of the circuit and vacuuming to eliminate all traces of humidity.
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R410A gas refill according to the exact specifications of the manufacturer Tosot.
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Verification of the full operating cycle to ensure return to nominal performance.
During the process, we also replaced the low pressure fitting gasket , which is often overlooked but essential to the longevity of the system.
Result: performance and comfort restored
Once the repair was completed, the pressures were perfectly balanced, and the condenser noise level returned to its almost inaudible operation, characteristic of Tosot Inverter models. The customer immediately noticed the rapid rise in interior temperature and the restored silence of his installation.
This type of failure, although minor, can quickly deteriorate energy performance if not addressed in time. By restoring proper operation of the refrigeration circuit, we enabled the customer to reduce their electricity consumption and prevent a more serious compressor failure .
Why trust AirGreen for your Tosot heat pump?
Our teams operate weekly across Montreal, Laval, Longueuil, the North Shore and the South Shore to maintain and repair wall-mounted, central and multi-zone HVAC systems of all brands, including Tosot, Midea, Gree, Fujitsu and LG .
What sets AirGreen apart:
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Precision diagnosis using professional measuring tools;
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Original parts and interventions in accordance with manufacturer standards;
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Fast and professional service , always focused on customer satisfaction;
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RBQ and TEQ certified technicians , experts in inverter heat pumps.
Preventive maintenance: the key to sustainability
We recommend that all our customers have their Tosot heat pump checked at least once a year , ideally before the cold season. Regular maintenance helps to:
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Detect microleaks before they affect performance;
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Avoid excessive electricity consumption;
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Extend the life of the compressor and fan;
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Preserve the manufacturer's warranty.
At AirGreen, we offer customized maintenance programs for all types of residential and commercial HVAC systems.
Conclusion: an effective repair, a satisfied customer
Thanks to this quick and careful intervention, the Tosot wall-mounted heat pump in Sainte-Thérèse is now operating at full capacity, offering our client stable, quiet and energy-efficient comfort .
Once again, our priority remains the same: ensuring the performance and reliability of HVAC systems throughout the Greater Montreal region .
AirGreen — Experts in repairing Tosot heat pumps and HVAC systems in Greater Montreal.