Job sheet · Repair

Repair of a Comfortmaker Wall-Mounted Heat Pump in Montreal

Discover how AirGreen repaired a Comfortmaker wall-mounted heat pump in Montreal, fixing a refrigerant leak and recharging the unit to restore comfort. Quick and professional service for Montreal and surrounding areas.

By AirGreen Climatisation & Chauffage Admin4 min read
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Quick and Efficient Intervention on a Comfortmaker Wall-Mounted Heat Pump in Montreal

At AirGreen, we specialize in HVAC repairs (heating, ventilation, and air conditioning) for all types of heating and cooling systems in Montreal, Laval, Longueuil, as well as on the North Shore and South Shore. In this article, we will share the story of a recent service call in an apartment in Montreal, where we resolved an issue with a Comfortmaker wall-mounted heat pump, allowing our client to quickly regain optimal comfort.

The Problem with the Comfortmaker Wall-Mounted Heat Pump

When we arrived at the apartment in Montreal, the client reached out to us due to an issue with their Comfortmaker wall-mounted heat pump. The heat pump was no longer cooling, which is a common sign of a refrigeration system malfunction. When the heat pump stops producing cool air, several factors can be at fault, such as a refrigerant leak or an internal issue with the motor or electrical circuits.

Diagnosis and Repair Steps

Once on-site, our technician performed a thorough diagnostic to identify the exact cause of the issue. Here are the steps followed during the intervention:

  1. Checking refrigerant levels: One of the first steps in the diagnosis was to measure the refrigerant levels using a refrigerant gauge. We found that the unit was indeed low on refrigerant, a situation often caused by a leak.

  2. Inspecting the pipes and connections: After detecting a low refrigerant level, our technician checked the connections and pipes between the exterior and interior units for any leaks. This step is crucial, as even a small leak can lead to performance issues and, over time, can severely damage the unit.

  3. Repairing the leak: Once the leak was located, we proceeded to repair the damaged pipes. We professionally welded the joints to prevent any future leaks and restore the system's sealing.

  4. Recharging refrigerant: After repairing the leak, we proceeded to recharge the refrigerant to the recommended levels. This step is essential to ensure the proper functioning of the system, especially in terms of energy efficiency and cooling performance.

Results and Client Satisfaction

Once all the repairs were completed, we ran tests on the Comfortmaker wall-mounted heat pump for several hours to ensure everything was functioning properly. The client was very satisfied with our intervention, as not only did the system regain its cooling power, but they also regained optimal comfort in their apartment.

At AirGreen, we are committed to providing HVAC repairs that are fast, reliable, and effective, ensuring long-lasting results and total customer satisfaction.

Why Choose AirGreen for Your Wall-Mounted Heat Pump Repairs?

By choosing AirGreen, you’re selecting a trusted partner for your HVAC repairs and maintenance. Here’s why our clients in Montreal, Laval, Longueuil, and across the North Shore and South Shore rely on us:

  • Technical expertise: Our technicians are highly trained to solve all types of issues, from the simplest to the most complex.

  • Fast and reliable service: We respond quickly to minimize inconvenience for our clients.

  • Guaranteed service: Every intervention is covered by a warranty, giving you peace of mind after we leave.

  • Personalized maintenance advice: We offer practical advice for maintaining your systems to avoid future problems.

Preventing Heat Pump Failures

To ensure the optimal functioning of your wall-mounted heat pump, it’s essential to have regular maintenance. Here are some practical tips to prevent costly failures:

  • Change the air filters: Dirty filters can significantly reduce the efficiency of your system.

  • Check refrigerant levels: Low refrigerant levels can cause a drop in performance.

  • Clean the exterior unit: The exterior unit can accumulate dust and debris, reducing its efficiency.

  • Schedule annual maintenance: A professional annual inspection can detect issues before they become serious.

By following these recommendations, you can extend the lifespan of your heat pump and avoid costly repairs.

Conclusion

During this intervention in Montreal, we were able to resolve a complex issue with a Comfortmaker wall-mounted heat pump, allowing our client to quickly regain their comfort and ensure optimal performance for the future. Whether you need HVAC repairs in Montreal, Laval, Longueuil, or anywhere else on the North Shore or South Shore, AirGreen is your trusted expert to meet all your heating and cooling needs.

Feel free to contact us for any questions or to schedule heat pump maintenance.

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: wall-mounted heat pump, indoor and outdoor units

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. Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.

  2. The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.

  3. Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.

  4. A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.

  5. The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.

  6. On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.

  7. The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.

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.

  • Clean the indoor unit's filters.
  • Clear leaves and debris left on the outdoor unit by winter.
  • Test cooling before the first hot days.
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. In heating mode, the outdoor unit can produce water.

2. You pick the capacity with a simple square-footage rule.

3. A multi-zone connects several indoor heads to a single condenser.

4. The disconnect can sit behind the patio furniture.

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.
Does a wall-mounted heat pump heat in winter?
Yes, it heats and cools. Its capacity drops in very cold weather; the operating range depends on the model and is listed on its spec sheet.
Wall-mounted or multi-zone: how do I choose?
One wall head and one condenser outside: the direct solution for a room or an open area. For two to five rooms, a multi-zone puts one head in each room on a single condenser.
Where does the outdoor unit go?
Where it stays above the snow, clear and accessible, away from walkways. We decide it with you during the estimate.
Are there grants?
Depending on the model and your situation, assistance programs may apply, including Hydro-Québec's LogisVert. AirGreen checks the model number before quoting an amount. See the grants.
Do I need a permit?
Rules vary from city to city: location, distances, noise. 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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