Repair of an Elios Wall-Mounted Heat Pump in Mercier
AirGreen repaired an Elios wall-mounted heat pump in Mercier by fixing a refrigerant leak. Discover how we restored its efficiency and ensured customer comfort. Reliable HVAC service in Montréal, Laval, and across North Shore/South Shore.
- City
- Region
- Equipment
- Brand
- Challenges
- Published
The job on one screen

The article, chapter by chapter
At AirGreen, we take pride in our expertise in heat pump repairs and other HVAC (heating, ventilation, and air conditioning) services throughout the Montréal, Laval, Longueuil, and the North Shore and South Shore regions. Our skilled and experienced technicians are always ready to resolve your equipment issues quickly and effectively. Today, we’re sharing the story of a recent service call for an Elios wall-mounted heat pump in Mercier, where our team was able to intervene and restore the client’s comfort.
A Common Issue with Elios Wall-Mounted Heat Pumps
During our visit to Mercier, the owner of an Elios wall-mounted heat pump reported a malfunction affecting the performance of the unit. Although the heat pump initially seemed to work, there was a loss of refrigerant pressure, which was impacting its efficiency. This type of issue is fairly common when leaks or blockages occur in the cooling system, directly affecting the unit's ability to maintain a consistent temperature.
Thorough Inspection and Diagnosis
Upon arrival, our technician conducted a thorough inspection of the unit to identify the underlying cause. The outdoor unit was clearly affected by a refrigerant leak, as evidenced by the low pressure in the lines. The service hoses were connected to a refrigerant bottle to precisely test and retrieve data from the system.
Issue Identified: Refrigerant leak in the closed circuit of the heat pump, preventing the unit from operating at optimal efficiency.
The Solution: Professional Repair and Refrigerant Recharge
Once the problem was identified, our technicians immediately began repairing the leak. This step is crucial because even a small leak can quickly degrade the unit’s performance. After locating and fixing the leak, the system was fully recharged with the necessary refrigerant. Our team always ensures to check refrigerant levels and test the lines again to prevent any future leaks.
Results and Customer Satisfaction
Once the repairs were completed, the Elios wall-mounted heat pump was operating as good as new. The client expressed their satisfaction with the speed and efficiency of our intervention, highlighting the importance of having a reliable and functional system for their home comfort. Thanks to this repair, the client was able to enjoy a comfortable indoor temperature even in the middle of the winter season.
This intervention also helped prevent potential prolonged damage to the unit, which could have led to more expensive repairs in the future. The work done not only restored the unit’s performance but also extended its lifespan.
Why Choose AirGreen for Your HVAC Repairs?
At AirGreen, we are committed to providing high-quality HVAC services based on in-depth technical expertise and a dedication to customer satisfaction. Every intervention is carried out with precision and professionalism, and we use only the highest-quality replacement parts to ensure the longevity of your equipment. Whether you're in Montréal, Laval, Longueuil, or the North Shore and South Shore, we’re here to meet your needs with reliability and speed.
We understand how important it is to keep your wall-mounted heat pump in excellent working condition, and we strive to solve every issue promptly. Our team also offers helpful advice to improve the energy efficiency of your system, allowing you to make long-term savings.
Conclusion
The repair of this Elios wall-mounted heat pump in Mercier not only restored the client’s comfort but also underscored the importance of regular heat pump maintenance. Thanks to our experienced team and our commitment to quality, you can be assured that your HVAC equipment is in good hands.
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).
