HVAC Services In St. Catharines
Is your furnace struggling during those cold St. Catharines winters? Hearing odd noises or experiencing uneven heating? Mr. Furnace delivers fast, reliable HVAC service throughout St. Catharines with same-day repairs and 24/7 emergency support. Our licensed technicians handle all heating and cooling systems, arriving promptly to restore your comfort. From routine maintenance to urgent repairs, we keep St. Catharines homes comfortable year-round.

Why Choose Mr. Furnace for Your HVAC Service?
Need fast HVAC service in St. Catharines? Whether it’s a broken furnace in winter or an AC failure in summer, Mr. Furnace Heating and Air Conditioning provides expert HVAC services to keep your home comfortable year-round. From emergency repairs to routine HVAC servicing, our team is ready to help. Book your service today!
Fast Response, Long-Term Solutions
When comfort issues arise, speed matters, but so does doing the job right. Some companies offer quick patches that don’t hold up. At Mr. Furnace, our technicians arrive promptly and go deeper to uncover what’s really wrong. We focus on complete, reliable repairs that restore performance and prevent repeat failures.
Licensed Technicians You Can Count On
With 47 years of trusted service in the St. Catharines area, Mr. Furnace is a name homeowners rely on. Our licensed technicians are trained to diagnose and repair all major brands and system types. Whether it’s a high-efficiency furnace, a ductless mini-split, or an aging air conditioner, we bring the experience and tools to fix it quickly and correctly.
Guaranteed Comfort, Zero Worries
We back our work with rock-solid guarantees. If your newly installed air conditioner breaks down within the first year, we’ll fix it. If your repaired furnace fails again in that time, we’ll return within 24 hours—or pay you $1,000. It’s our way of putting your peace of mind first.
Common HVAC Problems
Southern Ontario’s climate puts a lot of pressure on your heating and cooling systems. Preventative servicing is key to avoiding mid-season breakdowns.
No Heat or No Cooling
Could be a faulty thermostat, dirty filters, or a worn-out compressor.
Frequent Cycling On and Off
Often caused by improper sizing, sensor issues, or restricted airflow.
Poor Airflow or Weak Ventilation
Might be due to clogged vents, blower motor issues, or duct blockages.
Rising Energy Bills
Worn components or dirty coils make your system work harder, driving up costs.
Strange Noises or Odours
Loud clanging, buzzing, or unusual smells may point to mechanical or electrical issues.
Gas Leaks or Carbon Monoxide Alerts
Shut down your system immediately if you detect gas or your CO alarm activates, and contact us for urgent service.
For top-notch HVAC solutions, routine maintenance, and urgent repairs, trust Mr. Furnace to provide dependable services that cater to St. Catharines's unique climate challenges.
What’s Included in Our HVAC Servicing
Step 1: Comprehensive System Inspection
We begin by thoroughly inspecting your heating and cooling system. This includes checking air filters, wiring, blower motors, refrigerant levels, and thermostat function. Our goal is to pinpoint the problem and catch any issues before they escalate.
Step 2: Advanced Diagnostic Testing
Our team uses specialized tools to detect hard-to-spot problems, from airflow inconsistencies to refrigerant leaks or electrical faults. We don’t guess—we test with precision to ensure the fix is accurate and effective.
Step 3: Clear Repair Recommendations
You’ll receive a full explanation of what’s wrong, along with honest pricing before any work begins. We also offer flexible financing and payment plans, so there are no surprises—just solutions that fit your needs and budget.
Step 4: High-Quality Parts Replacement
When replacements are needed, we use only trusted components for durability and performance. As an authorized Lennox® dealer, we provide top-tier parts, and our fully stocked service vehicles mean most repairs can be completed in a single visit.
Step 5: System Cleaning & Efficiency Optimization
Dirt and dust can reduce performance and shorten your system’s lifespan. We clean filters, coils, fans, and duct openings to improve airflow, lower energy use, and reduce strain on your system.
Step 6: Final Performance Testing
After completing repairs or servicing, we run your system through a final test to confirm proper airflow, thermostat accuracy, and consistent temperature control. We also share maintenance tips to help you avoid future problems.
Common Queries Regarding HVAC Services In St. Catharines
When your furnace breaks down in the heart of winter or your air conditioning gives out during a scorching summer day, you can count on us to dispatch a technician swiftly. Mr. Furnace is proud to offer dependable HVAC services with round-the-clock availability in St. Catharines. Our certified professionals are here to help restore your home's comfort without delay.
How Often Should I Service My HVAC System?
A full HVAC inspection and tune-up should be done once a year. Ideally, schedule your service in the spring before cooling season or fall before heating season for maximum efficiency and reliability.
How Often Should I Replace My HVAC Filter?
Filters should be replaced every 1–3 months depending on your system, usage, pets, and air quality. A clean filter improves airflow and helps protect internal components from dust buildup.
How Much Does HVAC Repair Cost in St. Catharines?
It varies depending on the issue. Simple fixes like replacing a capacitor or cleaning a sensor are affordable. Larger jobs—such as blower motor or circuit board replacement—cost more. You’ll always get an upfront quote before we begin.
How Long Do HVAC Systems Last?
Furnaces and air conditioners typically last 10 to 15 years. Boilers and heat pumps can often reach 15 to 20 years with routine care. If your system is nearing the end of its lifespan or breaking down frequently, our team can help you decide whether repair or replacement makes more sense.