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.
- City
- Region
- Equipment
- Brand
- Challenges
- Published
The job on one screen

The article, chapter by chapter
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:
-
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.
-
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.
-
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.
-
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.
How the job unfolds
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
The symptoms, since when, the model (on the unit's label) and the error code if there is one.
We look for the cause, not just the symptom: readings, components, installation.
Repair, part to order or replacement, depending on the failure. We explain what we found.
The repair is done and parts replaced as needed.
The unit is restarted and checked in its operating modes.
What caused the failure and what can keep it from coming back.
- Your callThe symptoms, since when, the model (on the unit's label) and the error code if there is one.
- On-site diagnosisWe look for the cause, not just the symptom: readings, components, installation.
- The optionsRepair, part to order or replacement, depending on the failure. We explain what we found.
- The workThe repair is done and parts replaced as needed.
- TestsThe unit is restarted and checked in its operating modes.
- AdviceWhat caused the failure and what can keep it from coming back.
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.
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.
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.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
The right pages, at the right time
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.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
What people ask us about this kind of work
What should I have ready before calling?
Repair or replace?
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
An on-site estimate, the right capacity, the right equipment.
The on-site estimate is free and the quote follows within 24 hours.
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).
