Heat Pump Coaire Repair at Plateau-Mont-Royal
Discover how AirGreen repaired a Coaire heat pump in Plateau-Mont-Royal by fixing a refrigerant leak. Fast and reliable service to restore comfort in Montreal and surrounding areas.
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.
Service Call for the Repair of a Coaire Heat Pump in Montreal
At AirGreen, we are committed to providing efficient and reliable HVAC (Heating, Ventilation, and Air Conditioning) repair solutions tailored to each client’s specific needs. In this article, we detail a recent service call for a Coaire wall-mounted heat pump at Plateau-Mont-Royal, where our technicians performed a full diagnostic and meticulous repair to restore the client's comfort. Learn how we resolved this issue with expertise and professionalism.
Issue Encountered and Initial Diagnosis
During the service call, our client reported that their Coaire wall-mounted heat pump, installed in their Plateau-Mont-Royal home, was not functioning properly. After a quick system evaluation, our technicians noticed a pressure problem in the refrigerant circuit. The gauge indicated a refrigerant leak, which was disrupting the optimal performance of the heat pump.
Likely Causes and Technical Analysis
Refrigerant leaks are one of the most common causes of malfunctions in air conditioning and heating systems. In this case, the leak appeared to be coming from a loose connection between the compressor and the outdoor unit of the heat pump. This caused insufficient pressure in the system, preventing the unit from heating or cooling properly.
After locating the leak, our team confirmed that a refrigerant recharge was necessary to get the heat pump back in working order. We also performed a thorough check of the system's components to ensure no other issues were compromising the equipment’s performance.
Repair Process and Solutions Provided
1. Fixing the Refrigerant Leak
The first step in the repair was isolating and fixing the leak. Our technicians used specialized tools to properly tighten the connections in the refrigerant circuit and replace damaged seals. Once the leak was repaired, they proceeded with a refrigerant recharge according to the manufacturer’s specifications for the Coaire heat pump.
2. Performance Testing
After the recharge, a pressure test was performed to ensure the leak had been completely repaired. This test is essential to guarantee the system is functioning efficiently and to prevent any future leaks. Our technicians also checked the air filtration system and other components to ensure they were operating properly.
3. Restoring Comfort
Once the repairs were completed, our experts reprogrammed the outdoor unit and confirmed that the heat pump was restarting correctly. The client immediately noticed the difference: the home’s temperature became more comfortable, and the unit was functioning as good as new.
Client Testimonial and Repair Results
The client expressed satisfaction after our technicians’ intervention. They highlighted the professionalism of our team and the speed with which we identified and solved the problem. Indeed, after just a few hours, their Coaire wall-mounted heat pump was operational again, and the comfort of their home was restored.
Why Choose AirGreen for Your HVAC Repairs in Montreal
At AirGreen, we understand the importance of maintaining optimal comfort in your home, especially during the coldest or hottest months of the year. That’s why we are committed to providing quick, reliable, and effective heat pump repairs across Montreal, Laval, Longueuil, as well as on the North Shore and South Shore.
Our qualified technicians are trained to solve a wide range of technical issues, and we have the necessary equipment to perform repairs on all brands, including Coaire, Fujitsu, Gree, and many others. All of our interventions are carried out in compliance with safety standards, ensuring the long-term performance of your heating, ventilation, and air conditioning system.
Services Related to Heat Pump Repair
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Heat Pump Maintenance: To prevent future breakdowns, regular maintenance of your heat pump is essential. We offer maintenance packages that ensure the longevity and efficiency of your equipment.
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Heat Pump Installation: In addition to repairs, we also offer high-quality heat pump installation services tailored to the needs of your home or business.
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Energy Efficiency Advice: Our experts can advise you on the best practices to optimize the energy consumption of your heat pump, helping you achieve substantial savings.
Conclusion
In this service call at Plateau-Mont-Royal, our AirGreen team was able to quickly and effectively solve the refrigerant leak issue in a Coaire wall-mounted heat pump. Thanks to our expertise, we restored the client’s comfort in record time, ensuring a long-lasting and professional repair.
If you encounter similar issues with your heat pump, don’t hesitate to contact AirGreen for quick, efficient, and reliable service. We are here to ensure the smooth operation of your HVAC systems and restore your comfort year-round.
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).