Repair of a Lennox Air Conditioner in Ville-Marie: Specialized Service Call
Discover how AirGreen repaired a Lennox air conditioner in Ville-Marie, Montreal. Our fast and effective service restored the customer’s comfort. Call our experts for all your HVAC needs.
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 a Lennox Air Conditioner
At AirGreen, we understand how essential it is for your air conditioning system to operate efficiently, especially during the hot summer days. That's why we respond quickly to repair all types of HVAC equipment, whether it's a heat pump or a wall-mounted air conditioner. Recently, our technicians performed a repair on a Lennox air conditioner in the Ville-Marie area of Montreal, and today we’re sharing the details of this intervention.
Service Call Details
Location of Service Call: Ville-Marie, Montreal
Type of Machine: Lennox Air Conditioner
Reported Issue: Malfunction of the outdoor unit.
The client contacted AirGreen due to several issues with their Lennox air conditioner. The system did not seem to be functioning properly, and after an initial inspection, it became clear that the outdoor unit was having trouble. The goal of this intervention was to identify the source of the problem and carry out the necessary repairs to restore the air conditioner's performance.
Identifying the Problem and Diagnostics
Upon arrival, we began by conducting a thorough inspection of the Lennox air conditioner. The outdoor unit appeared to be faulty, and the problem was related to the cooling system, which was reducing the effectiveness of the unit.
One of the most obvious signs was that the air conditioner was operating intermittently, without maintaining a consistent temperature inside. Additionally, unusual noises were coming from the outdoor unit, indicating a potential blockage or mechanical failure.
Our technicians then conducted a series of diagnostic tests to assess the system as a whole. After checking the wiring connections, electrical components, and refrigerant levels, we discovered that an essential part of the cooling circuit was worn out, which had led to a loss of efficiency.
Repair and Parts Replacement
Once the problem was identified, our technicians proceeded with the repair by replacing the faulty parts and thoroughly cleaning the outdoor unit. In particular, we replaced the defective compressor and replenished the refrigerant system to ensure the unit would operate at optimal efficiency.
The compressor is a critical component of the air conditioning system, as it compresses and circulates the refrigerant throughout the circuit. When it is faulty, the system loses its cooling capacity, which leads to a decrease in performance and, in some cases, a complete failure.
Our technicians also checked the ventilation system and the electrical circuit to ensure there was no risk of overheating or further malfunction. After carrying out these repairs, we tested the air conditioner under different operating conditions to ensure it was back in service properly.
Results and Customer Satisfaction
Once the repair was completed, we verified the proper functioning of the Lennox air conditioner by performing several tests. We found that the outdoor unit was restarting correctly and that the cooling performance had been restored. The system was now running smoothly and quietly, providing a comfortable indoor temperature.
The customer was very satisfied with our quick and professional intervention. Thanks to our repairs, the Lennox air conditioner is once again performing at its full potential, ensuring a comfortable and cool indoor environment. Our team also provided maintenance tips to prevent future issues and ensure the equipment’s long lifespan.
Why Choose AirGreen for Your Air Conditioner Repairs in Montreal?
At AirGreen, we are committed to providing high-quality HVAC repair services tailored to each client's specific needs. Whether you need a simple wall-mounted air conditioner repair or a more complex intervention on a heat pump, our certified technicians have the expertise to resolve all your air conditioning issues.
We respond quickly in Montreal, Laval, Longueuil, the North Shore, and the South Shore to ensure our clients' comfort. Our services include diagnostics, repairs, maintenance, and parts replacement for all brands and models of air conditioners and heat pumps. Trust our expertise to ensure your equipment works efficiently, year-round.
Conclusion
In the case of this Lennox air conditioner in Ville-Marie, our technicians quickly and effectively solved the problem with the outdoor unit, allowing the customer to enjoy optimal comfort in their space once again. Thanks to our expertise and attention to detail, AirGreen continues to stand out as the trusted choice for HVAC repairs in Montreal and the surrounding 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).