Repair of a Coaire Wall-Mounted Heat Pump in Saint-Eustache
A quick repair of a Coaire wall-mounted heat pump in Saint-Eustache. AirGreen resolves refrigerant leaks, electrical malfunctions, and optimizes your system’s performance for maximum comfort and energy efficiency.
Take a tour of the installation
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.
A quick and effective repair for optimal comfort
At AirGreen, we specialize in the repair and maintenance of wall-mounted heat pumps of all brands. Recently, we carried out a repair on a Coaire wall-mounted heat pump in Saint-Eustache, on the North Shore of Montreal. This article details our intervention, the issues encountered, and the solution provided to guarantee our client unmatched comfort.
Initial Diagnosis and Issue Identification
During our service call in Saint-Eustache, the client reported that their Coaire wall-mounted heat pump was no longer producing cool air and was not operating optimally. After a thorough inspection, we quickly identified several issues:
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A lack of refrigerant due to a leak in the refrigerant line.
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A compressor overload, caused by improper maintenance and clogged filters.
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Electrical malfunctions affecting the communication between the indoor and outdoor units.
These issues led to an inefficient air conditioning system and increased energy consumption.
Repair Steps
Our team of specialized technicians immediately got to work to solve these problems. Here are the main steps of the intervention:
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Refrigerant Leak: We located the leak and replaced the damaged seals on the refrigerant supply line. New refrigerant was added to the system to ensure optimal performance.
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Cleaning and Maintenance: The system filters were carefully cleaned to remove dust and debris. A full maintenance check was performed on both the indoor and outdoor units to maximize system efficiency.
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Electrical Connections Repair: We checked and corrected the faulty electrical connections, ensuring smooth communication between the units. This restored the system’s regulation and optimization functions.
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Final Tests: After each step, we performed rigorous testing to verify that the system was functioning as expected. The entire system was validated with temperature and energy consumption measurements.
Results and Customer Satisfaction
After our intervention, the Coaire wall-mounted heat pump in Saint-Eustache regained its full potential. The system started cooling effectively, with reduced energy consumption, which not only improved the client’s comfort but also optimized their energy costs.
Our client was fully satisfied with the speed of our intervention, as well as the quality of our service. They noticed a significant reduction in noise from the outdoor unit and a uniform temperature regulation inside their space.
Why Choose AirGreen for Your Heat Pump Repairs?
AirGreen is a company specializing in the maintenance and repair of wall-mounted heat pumps and HVAC systems in the Montreal, Laval, Longueuil, and North Shore regions. Here are a few reasons why you should choose us:
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Technical Expertise: Our certified and experienced technicians know how to quickly diagnose and resolve all types of issues.
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Fast and Efficient Service: We understand the importance of restoring your comfort quickly. We are committed to responding as soon as possible.
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Long-Lasting Repairs: Using high-quality parts and providing thorough maintenance, we guarantee durable repairs and optimal performance.
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Personalized Customer Service: We prioritize clear communication and tailor-made solutions that suit your specific needs.
Conclusion
The repair of the Coaire wall-mounted heat pump in Saint-Eustache was a success, restoring not only the client’s comfort but also the energy efficiency of their system. At AirGreen, we pride ourselves on offering superior service for all your HVAC repair needs in the Montreal, Laval, Longueuil, and North Shore areas.
The big day, step by step
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.
Your own project, step by step
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.
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.
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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).