Repair and restoration of an LG wall-mounted heat pump in Anjou
Thought your heat pump was unrepairable? Think again. See how AirGreen revived an LG mini split in Anjou, saving the day for another thrilled homeowner!
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A Remarkable Turnaround: From "Unrepairable" to Thriving Again
When it comes to HVAC repairs, not every company is willing to take on the seemingly impossible. At AirGreen, we thrive on challenges, and our recent service call in Anjou proved just that. The project involved an LG Ductless Mini Split Heat Pump that the customer had all but given up on. They believed the machine was beyond repair, but with our expertise, we uncovered the real issue, bringing it back to life and leaving another delighted customer in our wake.
Understanding the Machine: The LG Mini Split Heat Pump
LG's ductless mini split systems are renowned for their sleek design, energy efficiency, and versatility. This particular model was ideal for the homeowner's needs, offering whisper-quiet operation and advanced features like:
- Inverter technology for optimized energy use.
- Dual cooling and heating modes, perfect for Montreal’s fluctuating seasons.
- A compact design that fits seamlessly into residential spaces.
Despite its reputation for reliability, even the best systems can experience issues, especially if neglected or improperly maintained. That’s where we stepped in.
The Call for Help: A Machine on Its Last Leg?
When the homeowner in Anjou reached out to us, they were skeptical. “I’ve been told it’s unrepairable,” they explained, describing how the system had suddenly stopped functioning. Their frustration was evident—several service providers had attempted repairs but failed to diagnose the problem correctly.
This wasn’t just a machine in need of fixing; it was a family relying on the comfort of their home. For us, this was more than a job—it was a chance to restore peace of mind.
Our Inspection Process: Leaving No Stone Unturned
From the moment we arrived, we approached the issue systematically:
- Visual Inspection: We checked the outdoor and indoor units for visible damage or wear.
- Electrical Diagnosis: Using specialized equipment, we tested the system’s connections and circuit boards.
- Airflow Analysis: We ensured no blockages were obstructing airflow.
- Refrigerant Check: Low refrigerant levels can be a common culprit in performance issues.
It was during this comprehensive inspection that we discovered the root cause—a malfunctioning sensor that had gone undetected by previous technicians. This small yet critical component was preventing the system from functioning, and many had missed it.
The Fix: Bringing an LG Heat Pump Back to Life
Once we pinpointed the faulty sensor, our experienced technicians got to work. Here’s what the repair process entailed:
- Replacing the Sensor: Using manufacturer-approved parts, we replaced the damaged sensor, ensuring compatibility and longevity.
- System Optimization: We recalibrated the system to operate at peak efficiency.
- Thorough Testing: Before leaving, we ran the heat pump through its paces, ensuring seamless performance in both heating and cooling modes.
The result? A fully operational heat pump that was as good as new.
Why Choose AirGreen for Your HVAC Needs?
Our success in Anjou highlights why customers trust AirGreen for their HVAC repairs:
- Expert Technicians: With years of experience, our team can tackle even the most complex issues.
- Comprehensive Diagnostics: We don’t just fix symptoms; we solve the problem.
- Commitment to Quality: From repairs to installations, we use only the best tools and materials.
Customer Reactions: Another Happy Homeowner
The homeowner couldn’t believe their eyes—or ears—when their heat pump roared back to life. They were thrilled to avoid the cost of a full replacement and impressed by our professionalism. “You saved me thousands of dollars,” they exclaimed.
Happy customers like this are why we do what we do.
The Importance of Regular Maintenance
While repairs are sometimes unavoidable, regular maintenance can significantly extend the lifespan of your HVAC system. Here are some tips to keep your ductless heat pump in top condition:
- Clean Filters: Dust and debris can reduce efficiency.
- Inspect Outdoor Units: Keep them clear of obstructions like leaves or snow.
- Schedule Annual Tune-Ups: Professional inspections can catch small issues before they become major problems.
Trust AirGreen for All Your HVAC Needs
Whether it’s an emergency repair or a routine service call, we’re here to help. Our team serves Montreal, Laval, Longueuil, the North Shore, and the South Shore, bringing unparalleled expertise to every project.
Got an HVAC issue? Don’t wait for it to escalate. Contact AirGreen today and experience the difference that true professionals can make.
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).