Job sheet · Repair

Repair Service of a York Central AC System on Nun’s Island

Freon leak? No problem! See how AirGreen revived a York Central AC on Nun’s Island, saving money and extending its life. Read the full story now!

By AirGreen Climatisation & Chauffage Admin6 min read
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Breathing New Life into a York Central AC System on Nun’s Island

Located in the serene and picturesque setting of Nun’s Island, a York Central Air Conditioning system had been the unsung hero of its household, providing cool relief during sweltering summers and ensuring year-round comfort. Recently, however, the system began to falter, prompting the homeowners to call on AirGreen, the trusted HVAC specialists serving Montreal and its surrounding areas.

This service call wasn’t just about fixing an issue; it was about preserving comfort and extending the life of a machine that still had much to offer. The result? A successfully repaired system operating at peak performance without the need for a costly replacement.


The Problem: Detecting and Repairing a Freon Leak

When we arrived on the scene, the homeowners explained that their York Central AC System had been losing its cooling power. After conducting a detailed inspection, we identified the problem—a freon leak. Freon leaks, while relatively common, are a serious issue for any air conditioning system. They can lead to diminished performance, increased energy consumption, and environmental concerns if left unchecked.

Using our advanced diagnostic tools, we carefully located the source of the leak. It was found in one of the copper lines, a common stress point for systems that have provided years of dependable service. Despite this issue, the rest of the unit was in excellent condition, making it an ideal candidate for repair rather than replacement.


The Repair Process: Restoring the York Central AC

Repairing a freon leak requires expertise and precision. Here’s how we handled this project:

  1. Locating the Leak
    Using state-of-the-art detection tools, we pinpointed the exact location of the freon leak. In systems like York, leaks are often found at connection points or areas that experience consistent stress over time.

  2. Sealing the Leak
    Once identified, we sealed the leak using industry-standard materials and techniques to ensure the integrity of the system. We also reinforced the surrounding area to prevent future leaks.

  3. Recharging the System
    After sealing the leak, we recharged the system with the appropriate type and amount of refrigerant, ensuring that the AC would deliver consistent cooling. For added peace of mind, we used an environmentally friendly refrigerant approved for York systems.

  4. Testing and Verifying
    Finally, we conducted a series of tests to confirm that the system was functioning optimally. We checked the airflow, cooling consistency, and energy efficiency to ensure everything was running like new.


Why Repair Instead of Replace?

In today’s world, it’s tempting to replace appliances at the first sign of trouble. However, at AirGreen, we believe in sustainability and cost-effective solutions. Here’s why repairing this York Central AC System was the right decision:

  • Reliability of York Systems
    York systems are built to last. Even with years of use, this unit showed no signs of major wear, making repair a practical and economical option.

  • Significant Cost Savings
    Repairing the freon leak and recharging the refrigerant cost a fraction of what replacing the entire system would have.

  • Environmental Responsibility
    Repairing instead of replacing reduces waste and conserves resources, aligning with our commitment to eco-friendly practices.


The Outcome: A Thrilled Homeowner and a Revived AC System

After completing the repair, we explained every step of the process to the homeowner and offered tips on how to maintain their system moving forward. The York Central AC was back to delivering cool, refreshing air throughout the home, performing just as it did when it was first installed.

The homeowner was overjoyed, not only because of the quick and affordable repair but also because they avoided the unnecessary expense of replacing a perfectly good system. As they said, “It’s like having a brand-new system without the price tag!”


Maintenance Tips for Your Central AC System

To keep your central AC running smoothly for years to come, here are a few maintenance tips:

  • Regularly Check and Replace Filters
    Dirty filters reduce airflow and efficiency. Replace or clean them every 1-3 months, especially during heavy usage periods.

  • Clear Debris Around the Outdoor Unit
    Ensure the outdoor unit is free from leaves, dirt, and vines (like the ones we found near this system!) to maintain proper airflow.

  • Schedule Annual Maintenance
    An annual tune-up can catch minor issues before they become major problems and keep your system running efficiently.

  • Watch for Warning Signs
    If your system struggles to cool, makes unusual noises, or increases your energy bills, call a professional immediately.


Why Choose AirGreen for Your HVAC Repairs?

At AirGreen, we pride ourselves on delivering exceptional service to homeowners in Montreal, Laval, Longueuil, and surrounding areas. Here’s what makes us the go-to choice for HVAC repairs:

  • Experienced Technicians
    Our team is trained to handle everything from minor repairs to major system overhauls with care and precision.

  • Customer-Centric Approach
    We prioritize repairs whenever possible, saving you money while reducing environmental impact.

  • Transparent Pricing
    No hidden fees or surprises—just clear, honest quotes for every job.

  • Commitment to Excellence
    Whether it’s a York system or any other brand, we use only the best tools and techniques to ensure durable results.


Conclusion: Preserving Comfort, One Repair at a Time

This repair project on Nun’s Island is a testament to the importance of professional intervention and preventative maintenance. By addressing the problem promptly, the homeowners not only extended the life of their system but also ensured their comfort for years to come.

If your HVAC system is showing signs of trouble, trust AirGreen to restore its performance. Contact us today to schedule your next service and experience the difference of working with Montreal’s HVAC experts!

The steps

How the job unfolds

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.
The tour

What we check on a job like this one

Each number is a point we check on site. Switch between summer and winter to watch air and heat move.

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.

Maintenance

Good habits, once the unit is in place

Six simple habits that keep the unit going. Your list stays on this device.

0 / 6 checked
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.
For your project

The right pages, at the right time

True or false

Four statements: true or false?

It all comes down to details you have just seen.

1. A central heat pump uses the house's ducts.

2. In extreme cold, electric backup heat can take over.

3. The filter only gets changed when the unit breaks down.

4. You can reuse the old unit's size without checking.

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.

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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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