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Remplacement d’une thermopompe murale Midea à Brossard
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Replacement of a Midea wall-mounted heat pump in Brossard

A complete project in a modern condominium

At AirGreen , we regularly work in recent buildings where several wall-mounted HVAC units are installed on the facade. This case in Brossard , on the South Shore of Montreal, perfectly illustrates our expertise: a complete replacement of a Midea wall-mounted heat pump in a residential complex.

The customer contacted us after noticing a complete breakdown of his outdoor unit , unable to provide either heating or air conditioning. The unit, about ten years old, had stopped working after a severe electrical storm.

Diagnosis: damaged electronic card and compressor

During our inspection, our technician immediately noted several clues:

  • No control voltage at the compressor terminal.

  • Condenser very dirty and fins partially oxidized.

  • Burnt power board , showing signs of overvoltage.

  • Compressor mechanically blocked (dull noise on startup).

After testing the components and evaluating the reconditioning costs, we recommended to the customer a complete replacement of the Midea heat pump with a newer, more energy-efficient model that was compatible with the existing configuration.

Dismantling the old unit: clean and safe method

The replacement took place in several precise stages:

  1. Safe recovery of refrigerant before dismantling, in accordance with environmental standards.

  2. Complete removal of the defective outdoor unit , as can be seen in the photo: it was carefully placed on the ground before transport.

  3. Inspection of existing refrigeration lines : cleaning, nitrogen flushing and leak testing.

  4. Checking the wall passage and fixings to ensure that no vibrations would be transmitted to the facade.

Installation of the new Midea heat pump

We installed a new Midea Hyper+ 18,000 BTU unit , featuring a high-performance inverter compressor and an intelligent defrost system .
This generation offers energy efficiency up to 20 SEER , ideal for the harsh winters and humid summers of the greater Montreal area.

Our technicians have:

  • Securely fixed the new galvanized wall bracket .

  • Connected the refrigeration pipes with brazing under nitrogen.

  • Performed a pressure test at 400 psi to confirm leak tightness.

  • Performed a complete vacuum to remove internal moisture.

  • Checked the communication between the internal and external electronic boards .

Commissioning and adjustments

After powering up, the new heat pump started up without a hitch.
We noted the following values:

  • Indoor blown air temperature: 10.2°C in air conditioning mode.

  • Compressor discharge temperature: 57°C , perfectly within Midea parameters.

  • Stable consumption at 6.1 A at full power.

The customer immediately noticed a reduction in outside noise , thanks to the improved design of the fan and inverter compressor.

An exemplary intervention in a multi-unit building

Modern condominiums often impose specific installation constraints : height, alignment of units, noise and condensation management.
At AirGreen, we scrupulously respect these requirements to guarantee:

  • A uniform aesthetic of the facade ,

  • Quiet operation ,

  • Maximum energy efficiency ,

  • And absolute safety of intervention , particularly when working near parked vehicles.

Recommended maintenance to extend lifespan

We reminded the client of the importance of an annual maintenance , including:

  • Cleaning the condenser and evaporator,

  • Checking operating pressures and temperatures,

  • Electrical component insulation test,

  • Emptying the condensation tray,

  • And calibration of the indoor temperature sensor.

An AirGreen maintenance contract was offered, including two visits per year , which ensures compressor longevity and stable performance.

Result: comfort, performance and peace of mind restored

Thanks to this intervention, the house regained immediate comfort and increased energy efficiency.
The customer particularly appreciated the speed of the service, the cleanliness of the site and the quality of the equipment installed.

The old unit was collected by our team for certified recycling , in accordance with current environmental standards.

At AirGreen, every Midea heat pump replacement is carried out with care, precision and passion.
Our goal: to offer a complete, sustainable and efficient HVAC service for every home in Montreal, Laval, Longueuil, the North Shore and the South Shore .