Professional service call for an LG wall-mounted heat pump in Rosemont–La Petite-Patrie
Think your heat pump is unrepairable? AirGreen proved otherwise in Rosemont, saving an LG Mini Split and delighting a customer with our expert HVAC service.
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A Seamless Repair That Surprised Everyone: The Story of a “Unrepairable” LG Heat Pump
When we received a call from a homeowner in Rosemont–La Petite-Patrie, they had nearly given up hope on their LG Mini Split Ductless Heat Pump. After a few unsuccessful attempts with other service providers, the customer was convinced the unit was beyond saving. However, at AirGreen, we believe in thorough diagnostics, meticulous work, and leaving no stone unturned. This service call turned into a testament to our commitment to quality and customer satisfaction.
The Initial Challenge: Diagnosing the “Unrepairable”
The customer's unit, an LG Mini Split with a sleek design and excellent energy efficiency rating, was showing signs of life but failing to cool or heat effectively. Common diagnostics like clogged filters, low refrigerant levels, or electrical faults didn’t seem to explain the issue.
When our technicians arrived, they noticed that the previous service attempts hadn’t delved deep enough into the system. The unit seemed fine on the surface, but subtle clues pointed to an internal fault that required deeper inspection. Our goal? To save the unit and ensure the customer didn’t need a costly replacement.
The Repair Process: Precision and Expertise at Work
Armed with advanced tools and decades of experience, our team:
- Inspected the Heat Pump’s Core Components: This included checking the condenser, evaporator coils, and fan motors.
- Tested Electrical Connections: Ensuring no loose or faulty wiring was causing intermittent failures.
- Evaluated Refrigerant Levels: Although within normal limits, we identified minor inconsistencies that hinted at an underlying issue.
- Disassembled and Inspected the Compressor: This is where we struck gold.
We discovered a hidden blockage in the compressor line—a rare issue that often goes unnoticed but can cripple the system's efficiency. By clearing the blockage and recalibrating the unit, we brought the heat pump back to life.
Customer Satisfaction: A Moment of Delight
The customer was astounded when the unit roared back to its former glory. What they thought was a lost cause became fully functional, delivering optimal cooling and heating once again. Our technicians took the time to explain the root cause, the repair process, and provided tips for future maintenance.
About the LG Mini Split Ductless Heat Pump
The LG Mini Split model installed in this home was designed for quiet operation, energy efficiency, and reliable performance. Key features include:
- Inverter Technology: Allows for precise temperature control and reduced energy consumption.
- Smart Connectivity: Many LG units offer Wi-Fi capabilities, enabling users to control the system remotely.
- Eco-Friendly Refrigerant: This model uses R410A, which minimizes environmental impact.
Why Choose AirGreen for Your HVAC Needs?
We pride ourselves on:
- Expert Diagnostics: Even for the most complex HVAC issues.
- Transparency: Explaining every step of the process to keep you informed.
- Exceptional Customer Service: Your satisfaction is our priority.
- Comprehensive Coverage: Offering services in Montreal, Laval, Longueuil, the North Shore, and the South Shore.
Our ability to handle this repair showcases the value of choosing experienced professionals. With AirGreen, no job is too big—or too challenging—for our skilled technicians.
Final Touches: Maintenance Tips for Longevity
Before leaving, our team provided the customer with a few simple tips to maintain their LG heat pump:
- Clean Filters Regularly: This ensures efficient airflow and reduces strain on the unit.
- Schedule Periodic Maintenance: Professional servicing every 12-18 months can prevent issues like this one.
- Monitor Performance: If you notice unusual noises or reduced efficiency, call us for a check-up.
A Happy Ending in Rosemont–La Petite-Patrie
What started as a daunting challenge turned into a rewarding experience for both our team and the homeowner. The revived heat pump is now operating at peak performance, ready to tackle the cold Montreal winters and humid summers.
At AirGreen, stories like this are why we do what we do. If you’re experiencing HVAC troubles or need an installation, trust us to provide top-tier service and results that exceed expectations.
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.
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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).