Exclusive Investigation: How Much Does Skipping Regular Maintenance on Your Air Conditioner in Montréal Really Cost You?

A neglected air conditioner can cost more than a full replacement… Here’s why.

In Montréal, where summers are getting hotter and heatwaves are lasting longer, the wall-mounted air conditioner has become essential in primary residences, condos, and even small rental buildings. Yet, despite how crucial this system is for everyday comfort, HVAC maintenance is too often overlooked. At AirGreen, we wanted to answer a simple yet essential question: how much does skipping regular maintenance on an air conditioner in Montréal really cost?

Through case studies, real field service calls, and detailed estimates, we discovered that neglecting maintenance can lead to significant financial losses, often invisible in the short term—but very real over time.

The hidden cost of a poorly maintained air conditioner

1. Skyrocketing energy consumption
A wall-mounted air conditioner or heat pump with dirty filters, coils, or fans can lose up to 25% of its energy efficiency. The result: the compressor has to work harder and longer, and your Hydro-Québec bill goes through the roof. A client in Villeray saw his summer electricity bill increase by 38% in just one year—simply because the unit hadn’t been serviced in two seasons.

2. Reduced equipment lifespan
A well-maintained HVAC unit can last 15 to 20 years. Without maintenance, components like the fan motor, circuit board, or temperature sensor wear out prematurely. This leads to early replacements costing between $500 and $1,500, not to mention the environmental impact of replacing an entire unit.

3. Health risks for occupants
A neglected air conditioner can accumulate mold, bacteria, and fine dust, which then gets circulated throughout your home. Several of our service calls in Longueuil and Laval revealed contaminants inside wall units of clients who reported chronic headaches or respiratory irritation.

Real AirGreen service cases across Greater Montréal

Gree Lomo 18,000 BTU wall-mounted air conditioner – Service call in Saint-Léonard
A customer called about strange noises coming from his unit. The cause: a fan clogged with lint and hair. After a full cleaning, the unit’s performance was restored and the noise disappeared.

Fujitsu KZAH R32 heat pump – Preventive maintenance in Laval
In a triplex, the owners had skipped maintenance for four years. Our inspection found early-stage corrosion on the condenser fins, partially blocked drains, and a completely saturated filter. Routine maintenance could have prevented over $900 in repair costs.

Cleaning a Midea 12,000 BTU wall-mounted air conditioner in Longueuil
Emergency call in August: the unit was no longer cooling. The reason: a clogged temperature sensor and a filter that hadn’t been changed in two years. The system mistakenly thought the room was already cool…

Critical components that require regular maintenance

• Air filters: clean every 1 to 3 months depending on usage.

• Coils (evaporator and condenser): inspect and clean annually.

• Condensate drain: check and clear to prevent leaks.

• Fans and blowers: dust removal to ensure proper airflow.

• Electrical connections and refrigerant levels: checked to prevent unexpected breakdowns.

Why preventive maintenance is a smart investment

1. Direct energy savings
A well-maintained air conditioner uses less electricity and delivers a better seasonal efficiency ratio (SEER). You can save up to $300 per summer just by optimizing your unit’s performance.

2. Fewer breakdowns, fewer costs
At AirGreen, we’ve found that 85% of emergency breakdowns could have been prevented with regular maintenance. A basic service call typically costs between $250 and $400, not including parts.

3. Eligibility for extended warranties
Some manufacturers require proof of annual maintenance to honor compressor or parts warranties. Without it, you may lose coverage in the event of a major failure.

AirGreen’s approach to air conditioner maintenance in Montréal

At AirGreen, our work doesn’t stop after installation. We offer custom HVAC maintenance plans, including:

• Full inspection of indoor and outdoor units.

• Deep cleaning of filters, coils, and fans.

• Performance testing and temperature readings.

• Detailed report with recommendations.

• Automatic annual reminders so you never forget a service again.

We provide service in Montréal, Laval, Longueuil, the South Shore, and the North Shore, for residential, commercial, and rental properties.

Conclusion: Don’t let your comfort quietly deteriorate

A high-performance air conditioner is great. But a well-maintained one is even better—for your comfort, your wallet, and your health. The cost of skipping regular maintenance in Montréal can be much higher than you think.

Contact AirGreen for a complete system inspection, or subscribe to our annual maintenance plan. Prevent rather than repair.