Repair

Repair triumph of a Central Heat Pump in Westmount

Think your HVAC is beyond repair? Read how AirGreen’s expert technicians in Westmount brought an old heat pump back to life, surprising our very happy customer!

By AirGreen Climatisation & Chauffage Admin3 min read
Repair triumph of a Central Heat Pump in Westmount
Repair triumph of a Central Heat Pump in Westmount
Generic diagram: central heat pump, indoor module and ducts

In summer, the outdoor unit rejects the house's heat outside.

Generic illustration of this type of installation, not a survey of this job site. Tap a number.

  1. It captures or rejects heat outside. It sits on a level base, above the snow, with free space all around.

  2. The insulated refrigerant lines enter the house through a sealed opening and run to the indoor coil.

  3. A shut-off switch near the outdoor unit isolates it safely for service.

  4. Sitting on the indoor module, it moves heat between the house air and the refrigerant.

  5. Electric furnace or air handler: its fan pushes air through the ducts. The electric backup takes over in extreme cold.

  6. Supply ducts bring air to the rooms; returns bring it back to the unit. Their condition matters as much as the unit's.

  7. It protects the coil and the fan. A dirty filter cuts airflow, so it gets checked regularly.

  8. It runs the heat pump and the backup heat. It must be compatible with the installed system.

A Surprising Discovery Leads to Customer Delight

When the residents of a beautiful, historical home in Westmount called us at AirGreen, their central heating system—a blend of a heat pump, AC, and furnace—was thought to be beyond repair. The challenge was clear: restore their comfort without replacing the whole system, a task that seemed nearly impossible at the outset. This story is not just about fixing a machine; it’s about restoring faith in what skilled technicians can achieve with expertise and a detective’s mindset.

Unraveling the Mystery: An HVAC Adventure

The journey began with a service call that almost didn’t happen. Our customer was nearly convinced that their aged but premium central heat pump system was irreparable. Descriptions of strange noises and inconsistent heating had been the norm for months, and previous technicians had simply patched the symptoms without solving the root cause.

Initial Assessment and the Breakthrough

Our AirGreen team arrived with tools and determination. The initial assessment did little to ease the homeowner's concerns, showing typical signs of wear and tear expected in a system of its age. However, our belief is that every problem has a solution, and with that, our technician dove deeper into the diagnostic process, which involves:

  • Comprehensive System Analysis: Checking every component from filters to coils for any signs of malfunction.
  • Thermal Imaging: Using advanced technology to identify any unusual heat signatures that indicate hidden issues.
  • Pressure and Flow Tests: Ensuring that all system fluids and air are moving as intended without any unseen obstacles.

The Turning Point

It was during the thermal imaging that our technician spotted an anomaly—a slight variance in temperature along one obscure pipe. This discovery led to uncovering a small, nearly undetectable leak in the refrigerant line, hidden behind the furnace unit, which had been misdiagnosed by others as sensor failure.

The Repair: Precision and Care

Armed with the right diagnosis, our team set out to rectify the issue with precision. The repair involved:

  • Sealing the Leak: Using high-grade materials to ensure the fix was permanent.
  • Recharging the Refrigerant: Carefully measuring and refilling the system’s refrigerant to manufacturer specifications.
  • System Optimization: Adjusting settings and conducting a full system test to ensure everything was in top operational order.

The results were immediately noticeable. The once erratic system began to run smoothly, with each room in the house reaching and maintaining the desired temperatures without the previous noise and fuss.

Customer Education and Final Touches

Understanding that a well-informed customer is a happy customer, our team took an extra step to educate the homeowners on:

  • Regular Maintenance Tips: How to keep their system running efficiently.
  • Early Warning Signs: What to watch for to catch issues before they become serious problems.
  • Energy Efficiency Practices: Simple habits that can reduce energy consumption and lower utility bills.

Why Choose AirGreen?

This service call in Westmount is a testament to AirGreen’s commitment to not just meeting, but exceeding customer expectations. Here’s why our service makes a difference:

  • Expert Technicians: Each team member is highly trained and equipped with the latest in HVAC technology.
  • Problem Solving Skills: We don’t just fix symptoms; we find and fix the root cause.
  • Customer-Centric Service: We believe in educating our customers, not just servicing their equipment.

For anyone in Montreal, Laval, Longueuil, or anywhere on the North or South Shore, AirGreen is your go-to provider for all things HVAC. Our ability to turn a near-impossible situation into a comfortable, energy-efficient home environment is what sets us apart. Trust us to handle your heating, ventilation, and air conditioning needs with the utmost professionalism and skill.

The steps

How it goes, from the first call to the end

The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.

Step 1 of 6Your call

The symptoms, since when, the model (on the unit's label) and the error code if there is one.

  1. Your callThe symptoms, since when, the model (on the unit's label) and the error code if there is one.
  2. On-site diagnosisWe look for the cause, not just the symptom: readings, components, installation.
  3. The optionsRepair, part to order or replacement, depending on the failure. We explain what we found.
  4. The workThe repair is done and parts replaced as needed.
  5. TestsThe unit is restarted and checked in its operating modes.
  6. AdviceWhat caused the failure and what can keep it from coming back.
Through the seasons

What to do, season by season

Three habits per season for this unit. They take a few minutes and prevent many calls.

  • Check the indoor module's filter.
  • Clear winter debris from the outdoor unit.
  • Test cooling before the heat arrives.
And at your place?

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Frequently asked questions

What people ask us about this kind of work

9 questions
What should I have ready before calling?
The model (on the unit's label), the error code if there is one, the symptoms and how long they have lasted.
Repair or replace?
It depends on the unit's age, the failure and the cost of parts. We present the options after the diagnosis.
Can I keep my current ducts?
Often, yes: the central heat pump connects to the existing ducts. We check their condition and size during the estimate.
What happens in extreme cold?
The indoor module (furnace or air handler) works with the central heat pump and takes over in extreme cold.
Furnace, air handler, ducted: what is the difference?
The furnace or air handler is the indoor module of the central system. A ducted system hides in the ceiling: all you see are small supply grilles.
Are there grants?
Depending on the equipment and your situation, assistance programs may apply. AirGreen checks the exact combination before quoting an amount. See the grants.
Do I need a permit?
Rules vary from city to city. See permits and by-laws, and we check for your address.
Does AirGreen hold the required licences?
Yes. AirGreen holds RBQ licence 5645-9605-01, subclasses 15.8 Ventilation, 15.10 Refrigeration and 16 Electricity.
Is the estimate free?
Yes. The on-site estimate is free and the quote follows within 24 hours. Book my free estimate.
Going further

Useful pages for what comes next

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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).

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