Heat Pump Repair for a Lennox Central Heat Pump in Lachine
AirGreen repaired a Lennox central heat pump in Lachine, quickly restoring the system's performance. Discover our HVAC troubleshooting expertise and why our services are essential in Montreal, Laval, Longueuil, and on the North Shore and South Shore.
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.
It captures or rejects heat outside. It sits on a level base, above the snow, with free space all around.
The insulated refrigerant lines enter the house through a sealed opening and run to the indoor coil.
A shut-off switch near the outdoor unit isolates it safely for service.
Sitting on the indoor module, it moves heat between the house air and the refrigerant.
Electric furnace or air handler: its fan pushes air through the ducts. The electric backup takes over in extreme cold.
Supply ducts bring air to the rooms; returns bring it back to the unit. Their condition matters as much as the unit's.
It protects the coil and the fan. A dirty filter cuts airflow, so it gets checked regularly.
It runs the heat pump and the backup heat. It must be compatible with the installed system.
Professional Maintenance and Troubleshooting to Ensure Optimal Comfort
At AirGreen, we specialize in repairing and maintaining heating, ventilation, and air conditioning (HVAC) systems in Montreal, Laval, Longueuil, as well as the North Shore and South Shore. In this article, we share a recent service call we handled for a Lennox central heat pump in Lachine, showcasing our expertise in HVAC troubleshooting and our ability to resolve complex technical issues.
Service Description: Repair of a Lennox Central Heat Pump
Recently, our team was called for a service request in Lachine, where a customer was experiencing performance issues with their Lennox central heat pump. The system was no longer functioning as efficiently as before, which affected the home’s comfort levels. After a thorough diagnostic, our team quickly identified the source of the issue and implemented a solution to restore the system’s proper functioning.
Initial Diagnosis and Problem Identification
Upon arrival, our technician performed a comprehensive assessment of the Lennox central heat pump. We quickly noticed several unusual symptoms, including a loss of performance and abnormal noise coming from the outdoor unit. After conducting a series of tests, we determined that the problem was due to a blockage in the air ducts, as well as a failure of a key component in the system.
Intervention and Repair
Once the problem was identified, we began the intervention by carefully disassembling the necessary components to access the blockage. We performed a thorough cleaning of the air ducts, which restored optimal airflow. Next, we replaced the faulty component, a pressure sensor, which had been responsible for the system’s intermittent shutdown.
By using original replacement parts and applying our technical expertise, we were able to bring the system back online quickly, without compromising the quality or safety of the system. We also conducted a full system check to ensure that all other components were in perfect working order.
Results of the Intervention and Customer Satisfaction
After our team completed the repair, the customer immediately noticed a significant improvement in the performance of their Lennox central heat pump. Not only did the system regain its ability to maintain a comfortable temperature throughout the home, but it also operated much more quietly, which was a relief for the homeowner. Thanks to our professional repair services and technical expertise, the customer was able to extend the lifespan of their system without having to replace the entire unit.
Why Choose AirGreen for Your HVAC Repairs in Lachine?
At AirGreen, we understand the importance of a reliable heating, ventilation, and air conditioning system, especially during the colder or warmer months. Our certified technicians are trained to diagnose and repair a wide range of HVAC systems, including Lennox central heat pumps. We provide fast, effective, and customized solutions for each situation, ensuring complete customer satisfaction.
Preventative Maintenance: Avoid Unexpected Breakdowns
In addition to our repair services, we recommend that our customers schedule regular maintenance for their HVAC systems. Preventative maintenance helps identify issues before they turn into costly breakdowns and ensures optimal performance year-round. At AirGreen, we offer maintenance packages tailored to the needs of each client, whether for central heat pumps, wall-mounted air conditioners, or other heating and cooling systems.
Conclusion
The repair of this Lennox central heat pump in Lachine highlights AirGreen’s commitment to delivering top-quality service and customized solutions for every client. If you’re experiencing issues with your HVAC system in Montreal, Laval, Longueuil, or anywhere on the North or South Shore, don’t hesitate to contact us. Our experts are ready to respond quickly to restore the comfort of your home.
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.
- Check the indoor module's filter.
- Clear winter debris from the outdoor unit.
- Test cooling before the heat arrives.
- Check the filter more often in peak season.
- Keep registers and returns clear.
- Watch condensate drainage near the coil.
- Change or clean the filter.
- Test heating and backup heat before the cold.
- Book periodic maintenance.
- Clear snow around the outdoor unit.
- Store nothing in front of the indoor module.
- Note any unusual noise or smell and call us.
Four statements: true or false?
It all comes down to details you have just seen.
1. A central heat pump uses the house's ducts.
It connects to the existing ducts to heat and cool everywhere.
2. In extreme cold, electric backup heat can take over.
The indoor module (furnace or air handler) works with the heat pump and takes over in extreme cold.
3. The filter only gets changed when the unit breaks down.
A dirty filter cuts airflow. It gets checked regularly.
4. You can reuse the old unit's size without checking.
The house may have changed: insulation, windows, added rooms. Capacity is confirmed on site.
0 / 4 right answers
What people ask us about this kind of work
What should I have ready before calling?
Repair or replace?
Can I keep my current ducts?
What happens in extreme cold?
Furnace, air handler, ducted: what is the difference?
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).