Fast and precise intervention by AirGreen
When a client in Sainte-Thérèse , on the North Shore of Montreal , contacted us about a breakdown of their Midea central heat pump , the situation was urgent: the house was no longer heating up despite an outdoor compressor that seemed to be working. This type of scenario is common during the off-season, when systems are under heavy load after several months of inactivity. At AirGreen , we know that an accurate diagnosis and effective repair make all the difference between simple temporary discomfort and a costly breakdown.
Initial inspection: understand the symptom first
Upon our arrival, our certified technician first performed a thorough inspection of the Midea outdoor compressor , which was mounted on a wall bracket approximately two meters above the ground. This type of installation, common on brick house facades, optimizes airflow and protects the unit from snow and debris.
However, the customer had noticed an abnormal noise and a lack of heat inside. These signs often point us towards a problem with the refrigerant , reversing valve or electronic card .
Detailed diagnosis: precision above all
Our pressure measurements quickly revealed an abnormal drop in the R-410A refrigerant . A visual inspection of the connections confirmed the presence of a microleak on a copper solder connecting the compressor to the manifold. This type of leak, often invisible to the naked eye, manifests itself over time due to vibrations and repeated thermal cycles .
Before any recharging, we have:
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cut off the power supply at the external circuit breaker;
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carried out a complete vacuum draw of the circuit ;
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repaired the defective section by silver re-soldering ;
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added anti-corrosion protection on the repaired line.
Once the leak test was validated, we proceeded to recharge the system according to Midea specifications , ensuring pressures in accordance with the technical manual.
Recommissioning: Return to original performance
After reactivation, the heat pump resumed stable operation. The blowing temperatures were within the nominal values (23°C in heating mode), and the abnormal noise had completely disappeared. We also took advantage of the intervention to:
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clean the outdoor coils;
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check power consumption;
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inspect control connections and indoor thermostat.
These steps ensure increased durability and better energy efficiency of the system.
Maintenance tips to prevent breakdowns
At AirGreen, we always emphasize prevention . For owners of Midea central heat pumps or other brands like Gree, Fujitsu or Goodman , we recommend:
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A complete maintenance in spring and fall , including cleaning filters and checking pressures;
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Monitoring of abnormal noises or variations in performance ;
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Sufficient clearance around the outdoor condenser (minimum 60 cm on each side);
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An annual check of the electrical connections and the condensate drain .
These simple actions help prevent 80% of the emergency calls we receive during peak periods.
Local expertise and AirGreen commitment
Our team operates weekly in residential areas of the North Shore , including Blainville, Sainte-Thérèse, Lorraine and Bois-des-Filions , for repairs to HVAC systems of all brands. What sets AirGreen apart is our approach: we treat each call not just as a repair, but as an opportunity to optimize the overall performance of the system .
Thanks to our experience with Midea models from different ranges (including the Premier series and the 38 series , popular in Quebec), we have a perfect command of pressure specifications, defrost behaviors and electronic card diagnostics . This expertise ensures fast, precise interventions that comply with the strictest standards in the industry.
A satisfied and reassured customer
Before our departure, we explained to the customer the causes of the breakdown, the repairs carried out, and best practices for extending the life of his equipment. He particularly appreciated the transparency of the intervention report and the clarity of the recommendations provided by our technician.
At AirGreen , every intervention aims to restore not only immediate comfort, but also the long-term reliability of the HVAC system. Our priority: ensuring that each system operates as efficiently as the day it was installed.
In conclusion
This Midea central heat pump repair in Sainte-Thérèse perfectly illustrates the importance of a methodical diagnosis , careful intervention and regular maintenance .
At AirGreen , we combine technical expertise, attention to detail and in-depth knowledge of the climate realities of Greater Montreal to offer sustainable and efficient HVAC service — whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore .