Repair or Replace Your Wall-Mounted Heat Pump: The Definitive Guide with Real-Life Examples from Montréal Homeowners

A Common Dilemma for Households in Montréal, Laval, Longueuil, North Shore and South Shore

In the residential HVAC world, we receive calls every day from clients who are torn between repairing their existing wall-mounted heat pump or opting for a complete replacement. The decision is never easy—it involves weighing short-term costs, energy performance, available grants, and the estimated remaining lifespan of the current unit. At AirGreen, we’ve helped hundreds of households across Montréal and surrounding areas navigate this choice. This guide is based on real-life examples, actual homeowner experiences, and technical cases we’ve seen in the field, to help you make an informed decision.

When Repairing Your Wall-Mounted Heat Pump Makes Sense

Typical Cases Where Repairs Are a Reasonable Option

Repairing is generally a viable solution when:

• The issue is isolated and clearly identified (e.g.: stuck fan, faulty sensor),

• The replacement part is readily available,

• The unit is less than 10 years old and has been properly maintained,

• The original installation was done in compliance with RBQ standards.

For instance, a client in Ahuntsic recently contacted us about a strange noise coming from their Fujitsu 12,000 BTU outdoor unit installed in 2017. Upon inspection, we found that the fan motor was misaligned. A simple, low-cost replacement brought the unit back to full operation within 24 hours, with no loss in performance.

Repairing Can Also Extend the Lifespan… If Conditions Are Right

A well-installed and properly maintained wall-mounted heat pump can easily last over 15 years. The key is making sure:

• There’s no refrigerant leakage,

• The unit is clean and unobstructed,

• The compressor is functioning normally.

In Brossard, a couple with a Gree wall-mounted air conditioner from 2016 chose to have the unit cleaned and a defrost sensor replaced rather than go for a full replacement. The result: the unit runs like new, with minimal investment.

Signs That It's Time to Replace Your Wall-Mounted Heat Pump

When Repair Costs No Longer Make Economic Sense

Some situations make repairs impractical:

• Chronic refrigerant leaks (requiring frequent re-soldering),

• Burnt circuit boards that are hard to source,

• Units installed more than 12 to 15 years ago,

• Outdated models using R-410A, incompatible with newer refrigerants like R-32.

In Villeray, a homeowner with an old Sharp 18,000 BTU from 2009 contacted us for a breakdown. Our diagnosis revealed a dead control board and a slow leak in the indoor coil. Repair costs were close to $1,200… while a brand-new, more efficient, and grant-eligible model cost $2,800 installed. Unsurprisingly, they chose to replace.

Replacement Can Unlock Access to New Grants

Replacing also makes you eligible for Hydro-Québec’s LogisVert rebates, which can go up to $2,500 depending on the model and situation. For example:

• A Sharp ZU1 24,000 BTU we installed in Laval earned the client a $1,860 grant,

• A Gree Extreme 18,000 BTU wall-mounted heat pump installed in Sainte-Julie led to a $1,704 subsidy.

These incentives significantly lower the net cost of a replacement, especially when dealing with an old, inefficient unit.

Real-World Case Studies from Montréal Clients

Case 1: Maintenance vs. Replacement in Rosemont

A client owned a Midea wall-mounted heat pump installed in 2014, but hadn’t serviced it in 7 years. The result: dust buildup, reduced heating capacity, and a musty smell at startup. The compressor was still functional, but the system was clogged. She was on the fence about repairing.

Our recommendation:

• Full cleaning of the evaporator and condenser,

• Replacement of the permanent filter,

• Monitoring of electricity usage over 3 months.

By the end of winter, the client reported a 12% drop in her Hydro-Québec bill. In this case, a repair was enough… for now.

Case 2: Strategic Replacement in Côte-des-Neiges

A young homeowner had just purchased a condo with an old Daikin heat pump installed in 2008. Noisy, inefficient, and unable to heat properly in cold weather. Rather than repair, he opted for a replacement with a Gree Sapphire 18,000 BTU model, certified for -30°C, and received a $1,704 rebate.

The AirGreen Approach: Expertise, Transparency, Support

Personalized Diagnostics

Before any intervention, we carry out a complete analysis of your HVAC system, including:

• Visual inspection,

• Performance check,

• ROI assessment (repair vs. replace),

• Neutral, well-documented recommendations.

Access to All Major Brands and Models

We install a wide selection of wall-mounted heat pumps tailored to each client’s needs:

• Sharp ZU1,

• Gree Extreme,

• Fujitsu KZAH,

• Bosch BOVA,

• Midea EVOX.

Every installation is done by the book, with correctly sized piping, thorough vacuuming, and systematic pressure testing.

Conclusion: Make the Right Decision, With the Right Information

Repair or replace? The answer depends on your unit, your budget, and your energy goals. Thanks to our field experience in Montréal, Laval, Longueuil, and across the North Shore and South Shore, we help you make the best choice.

At AirGreen, we never push sales. We guide you with clarity and precision, whether you're considering maintenance or a strategic replacement.