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Réparation d’une thermopompe murale Haier à Sainte-Julie
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Repair of a Haier wall-mounted heat pump in Sainte-Julie

A heat pump stuck under a gallery: a typical Quebec challenge

When a Sainte-Julie homeowner contacted us about a performance issue with their Haier wall-mounted heat pump , the winter context and the location of the outdoor unit under a deck immediately caught our attention. This type of installation, common in many South Shore homes, presents specific challenges related to ventilation, debris accumulation, and ice formation .

At AirGreen , we understand that every service call is unique. Our team dispatched an experienced technician to the site to diagnose the problem and restore the customer's HVAC system before the cold weather sets in.

Diagnosis: loss of efficiency and faulty defrosting

Upon our arrival, the customer reported that his heat pump was no longer heating efficiently and was frequently shutting down in defrost mode. Upon examining the outdoor unit, we quickly noticed:

  • A buildup of dead leaves and debris around the base, obstructing the base of the condenser.

  • Restricted air circulation due to the proximity of the terrace floor.

  • An unstable base , made of concrete blocks and unleveled slabs, causing the device to tilt slightly.

  • Traces of ice and condensation on the bottom of the coil, a sign of incomplete defrosting.

Our first step was to measure the pressure of the R-410A refrigerant and check the automatic defrost cycles. The readings indicated a pressure slightly lower than normal, with no apparent leaks visible.

Intervention: cleaning, realignment and optimization of airflow

To restore the heat pump to good working order, our technician undertook several targeted actions:

  1. Complete cleaning of the outdoor condenser : removal of leaves, dust and debris accumulated under the gallery using an air blower and a soft brush.

  2. Realignment and stabilization of the base : repositioning the heat pump on uniform insulating blocks to correct the inclination and avoid vibrations.

  3. Manual defrosting and inspection of the condensate drain , often blocked in low clearance installations.

  4. Fan and blade check : slight dirt buildup reduced performance; cleaning restored rated speed.

  5. Recalibration of the outdoor temperature sensor to ensure an optimal defrost cycle in freezing conditions.

After these interventions, we carried out a complete heating test . The compressor and the fan resumed a stable rhythm, and the indoor blowing temperature increased by more than 6°C in just a few minutes.

A lasting result and a reassured customer

Thanks to this intervention, the customer's Haier heat pump is now operating at full capacity, despite its installation in a confined space. We also took the time to explain maintenance best practices to the owner:

  • Maintain a minimum clearance of 30 cm around the outdoor unit , even under a terrace.

  • Raise the base slightly to avoid contact with melted snow.

  • Check defrosting after each major frost event.

  • Schedule annual preventative maintenance , ideally in spring or fall.

This preventive approach is essential to extend the life of heat pumps, especially those installed in confined spaces.

AirGreen expertise: adaptation to each environment

Each South Shore neighborhood presents its own unique challenges—whether it's the cold winds of Saint-Bruno , the increased humidity of Boucherville , or the typical low-lying terraces of Sainte-Julie . Our AirGreen team always adapts its interventions to local specificities.

Thanks to our years of experience in Montreal, Laval, Longueuil, on the North Shore and the South Shore , we have developed a unique expertise to quickly diagnose and repair all brands of residential HVAC systems : Haier, Midea, Gree, Fujitsu, Sharp, Lennox, Goodman , and many others.

In conclusion

This Haier wall-mounted heat pump repair in Sainte-Julie perfectly illustrates our commitment: to optimize the comfort of our customers in all seasons , even in the most complex installations. By intervening quickly, we not only resolved the fault, but also prevented future failures caused by lack of ventilation and instability of the base.

At AirGreen, we believe every service is an opportunity to offer more than just repairs—it's an opportunity to provide lasting comfort and peace of mind to our customers.