In this project in Rosemont–La Petite-Patrie , our AirGreen team repaired a Goodman central heat pump installed on the roof of a multi-unit residential building (plex/condo). The dense urban environment, flat gravel roofs, and multiple HVAC units on the same roof are typical of this area of Montreal.
Context and system type
The building is equipped with a Goodman central heat pump , connected to an indoor air management system and a network of ducted units. This type of system is common in Montreal multi-family buildings, as it allows for the efficient heating and cooling of several spaces from a single outdoor condenser.
Since the exact model is not clearly visible in the photos, we are dealing with a recent generation Goodman central heat pump , compatible with rooftop installations and designed to withstand Quebec's climatic conditions.
Problem detected during the service call
The client contacted us regarding the following symptoms:
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Significant loss of air conditioning performance
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Irregular operating cycles
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Unusual noises coming from the outdoor unit
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Indoor temperature difficult to stabilize
These signs suggested a problem with both the electrical and refrigeration systems , possibly exacerbated by constant exposure to the elements on the roof.
Complete diagnosis carried out by AirGreen
Once on site, our technicians carried out a thorough inspection:
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Checking the electrical connections in the external housing (for signs of wear and oxidation due to humidity)
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Refrigerant pressure control
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Visual inspection of insulated refrigeration lines
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Condenser and compressor fan test
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Validation of air clearance around the unit (important on rooftops)
The diagnosis confirmed:
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A weak electrical connection causing intermittent outages
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Pipe insulation partially degraded by sun and frost
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An early pressure imbalance affecting overall performance
Repair work carried out
We carried out the following interventions:
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Complete restoration of electrical connections in the service box
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Securing and sealing cable entry points
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Replacement and improvement of refrigeration line insulation
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Adjustment of operating parameters and testing under real load
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Final check of the heating/cooling cycle
All work was carried out in compliance with safety standards for roof work , with adequate stabilization of the unit on its treated wooden supports.
Final result for the client
After the repair:
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The Goodman central heat pump operates smoothly and stably
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Thermal comfort has been restored throughout the entire dwelling.
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The cycles are shorter and more efficient
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The noise level has returned to normal.
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The customer benefits from improved energy efficiency and increased peace of mind.
Why entrust the repair of your central heat pump to AirGreen?
At AirGreen , we regularly work on complex installations: rooftops, multi-family buildings, central systems, and demanding urban environments. Our approach is based on:
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A precise diagnosis , never an approximate one.
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Sustainable repairs adapted to Montreal's climate
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Concrete expertise from brands like Goodman
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Clear and professional communication with our clients
Whether it's for an urgent repair, preventative maintenance or a complete evaluation of your HVAC system, our team is ready to intervene effectively in Rosemont–La Petite-Patrie and throughout Greater Montreal.