Repair of a Central Heat Pump in Lachine – Electric Furnace and Air Handler
Discover how AirGreen repaired a central heat pump and air handler in Lachine, ensuring optimal comfort for the client. We offer HVAC troubleshooting services on Montreal’s South and North Shores.

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.
At AirGreen, we know how crucial it is to have a properly maintained heating, ventilation, and air conditioning (HVAC) system to ensure optimal comfort at home or in the office. Recently, our team responded to a service call in the city of Lachine, where a client was experiencing issues with their central heat pump and air handler. This type of repair requires in-depth expertise and specific know-how, especially when dealing with essential HVAC components such as the electric furnace and the air handler.
Problem Identified During the Service Call
The client had noticed that the interior temperature of their house was uneven, with some rooms much colder than others. After inspecting the system, our technicians determined that the issue was related to the central heat pump and the air handler of the furnace. This kind of problem can occur for several reasons: blockages in the ducts, electrical problems, or failures in the control circuits.
After a thorough diagnosis, it was discovered that the air handler filters were clogged and that electrical connections in the control system of the heat pump had failed. These issues were affecting the overall operation of the system, preventing warm air from circulating efficiently.
Steps Taken for the Repair
Our priority at AirGreen is to provide fast and efficient solutions, making sure that every detail is taken care of to restore our clients' comfort.
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Initial Inspection and Diagnosis: Our technicians began by inspecting the entire HVAC system, checking the electrical connections, pipes, and filters.
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Cleaning and Replacing Filters: The filters of the air handler were carefully cleaned to remove dust and debris blocking the airflow. If necessary, we also replaced the filters to ensure optimal air quality.
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Repairing Electrical Connections: Once the power supply issue was identified, our experts repaired the faulty connections in the control system.
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Testing and Verification: After completing the necessary repairs, we tested the system to ensure the heat pump and air handler were working correctly. Our technicians checked the flow of warm air throughout all the rooms and adjusted settings to ensure maximum performance.
Results and Customer Satisfaction
Thanks to the expertise of our team and a prompt intervention, we successfully resolved the issues with the central heat pump and restored the client's comfort. The heating system is now operating optimally, and the house is once again heated evenly. The client was particularly pleased with the speed of our service and the clarity of the explanations provided during the intervention.
Tips for Maintaining Your Heat Pump and Air Handler
To avoid similar issues in the future, we recommend regular maintenance of your HVAC system, particularly the central heat pump and air handler. Here are some practical tips:
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Check and Replace Filters Regularly: Clogged filters can reduce the efficiency of your system and affect air quality.
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Inspect Electrical Connections: Faulty connections can lead to inefficiency and breakdowns.
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Call a Professional for Annual Maintenance: Professional maintenance helps identify and fix issues before they become serious.
At AirGreen, we offer complete HVAC repair services, including maintenance and repair of central heat pumps, air handlers, and other heating and cooling systems. If you're experiencing similar issues in Lachine or the surrounding areas, feel free to contact us for a full evaluation and quick intervention.
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.
More jobs to see, near you
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Every house has its constraints. We see them before we install.
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).
