Furnace Repair in St. Catharines
A broken furnace can quickly turn your home from cozy to uncomfortable. If your heat isn’t coming on, your unit keeps shutting off, or something just sounds off, Mr. Furnace Heating and Air Conditioning is here to help. We offer fast, professional furnace repair in St. Catharines backed by 47 years of trusted local service. From emergency fixes to diagnosing unusual performance issues, our licensed HVAC technicians are trained to work on all furnace brands and models. We arrive fully equipped and ready to get your heat back on safely without delay or guesswork.
Why Homeowners in St. Catharines Choose Mr. Furnace
We’re On Our Way!
Heating systems don’t wait for business hours to break down. That’s why our furnace repair team is available 24/7 for emergencies, with fast dispatch across St. Catharines. We’ll arrive prepared to diagnose and fix the problem, whether it’s a quick tune-up or something more complex.
Repairs That Prevent Future Breakdowns
Some repair services apply temporary patches or guess their way through the issue. We don’t work that way. Our team uses advanced diagnostics and years of experience to find the true cause of your furnace failure. We address the root of the issue, not just the symptom, so you don’t find yourself calling again next week.
Reliable Furnace Service from Experts Who Put You First
When we repair your furnace, we stand behind our work. If the same problem reappears within the warranty period, we’ll return to fix it again—free of charge. Our repairs are backed by a workmanship guarantee, giving you peace of mind and protection long after we’ve left your home.
Guaranteed Comfort, No Fine Print
You’ll always receive a written quote before any work begins. We explain what’s wrong, what needs to be fixed, and why—so you can make an informed decision. We don’t upsell or recommend replacements unless they’re truly necessary. Just transparent service from technicians you can trust.
No heat in the middle of the night? Our emergency furnace repair team is available 24/7. When your furnace acts up, our furnace service experts are ready to help. Trust our furnace repair service to get your home warm again, fast.
Our Furnace Repair Service Process
Step 1: A Careful Inspection to Find the Real Problem
We start every visit with a visual inspection and safety review. Our technician checks the area around the furnace, inspects for error codes or visual damage, and evaluates your system’s overall condition. We also verify the integrity of gas lines, electrical connections, and filters to rule out basic concerns.
Step 2: Smart Diagnostics That Get It Right the First Time
Using diagnostic equipment, we assess key furnace components such as the heat exchanger, igniter, blower motor, thermostat, flame sensor, and pressure switch. We also check combustion efficiency, venting, and airflow to isolate the issue. This process helps us pinpoint the exact fault and recommend the right repair.
Step 3: Upfront Repairs with No Surprises
Once we identify the issue, we explain the problem and the fix in clear terms. With your approval, we complete the repair using manufacturer-approved parts. Most common issues are resolved during the same visit. Our vans are stocked with replacement parts for the majority of residential furnace systems.
Step 4: Fast Part Replacements to Get Your Heat Back
If components need replacing, we get to work immediately. Whether it’s a failed capacitor, dirty flame sensor, or faulty valve, we install high-quality replacement parts built to last. We ensure each new part is tested, calibrated, and functioning before proceeding.
Step 5: Boosting Performance While We’re at It
During repairs, we also fine-tune the system. This includes checking and cleaning the blower assembly, adjusting fan speed, clearing drain lines, and replacing or inspecting the air filter. These steps help your system operate more efficiently and prevent future breakdowns.
Step 6: Final Safety Checks
Before we finish, we perform a detailed safety review. We test for carbon monoxide, confirm proper venting, and ensure your thermostat is responsive and calibrated. When our technician leaves, your system will be running safely, efficiently, and reliably.
Common Furnace Problems
Even a regularly maintained furnace can run into trouble. Below are some of the most frequent issues our technicians fix during furnace service calls in St. Catharines.
Furnace Blowing Cold Air
- Faulty Ignition System – When the igniter is cracked or dirty, the burner won’t ignite, leaving the system running but producing no heat.
- Dirty Flame Sensor – If the flame sensor can’t detect a burner flame, it shuts off the gas valve as a safety measure.
- Thermostat Issues – Dead batteries, incorrect settings, or faulty wiring can prevent your furnace from switching into heating mode.
Furnace Won’t Turn On
- Tripped Circuit Breaker – Power surges or electrical overload can trip your breaker and shut down the system completely.
- Blower Motor Failure – A faulty blower or capacitor can prevent airflow and disable the unit from circulating warm air.
- Clogged Air Filter – A dirty filter blocks airflow, overheating the system and triggering the high-limit switch to shut it off.
Strange Noises or Smells
- Banging or Rattling – These sounds can come from loose ductwork, damaged blower components, or delayed ignition inside the burner chamber.
- Burning Smell – This might mean dust buildup, an overheating motor, or wiring insulation melting—none of which should be ignored.
- Gas Smell – If you smell gas, shut off your furnace immediately, evacuate the home, and call for emergency service. A leak could be extremely dangerous.
If you’re dealing with any of the above issues, don’t wait. Contact Mr. Furnace for a same-day inspection. Our expert furnace repair technicians will diagnose and resolve the issue fast—before it gets worse.
Frequently Asked Questions About Furnace Repair
Tired of Frequent Furnace Breakdowns?
Get expert furnace repair in St. Catharines that fixes the problem for good—no more cold nights or unexpected failures. Whether you need routine furnace service or emergency furnace repair, Mr. Furnace is here 24/7 to keep your home warm and comfortable!
How Often Should I Have My Furnace Serviced?
Annual service is strongly recommended. It helps extend your furnace’s lifespan, reduces the risk of breakdowns, and improves efficiency. The best time to schedule furnace maintenance is in early fall—before winter heating demand kicks in. During a tune-up, we clean and test critical components, inspect gas lines, and check for signs of wear or damage.
How Much Does a Furnace Repair Cost?
Repair costs vary based on the issue. At Mr. Furnace, we always provide a written estimate before work begins so you know exactly what to expect.
How Many Years Does a Furnace Last?
Most modern furnaces last between 15 and 20 years. Gas furnaces tend to fall within this range, while some electric models may last longer with proper maintenance. If your furnace is over 15 years old and has recurring issues, it might be more economical to replace it. Our team can help you weigh repair costs against long-term replacement benefits.
Can I Repair My Furnace Myself?
While some minor troubleshooting—like changing the thermostat batteries or replacing an air filter—is safe for homeowners, most furnace repairs should be left to licensed professionals. Gas systems in particular can pose serious safety risks if mishandled. Our trained technicians diagnose and fix issues safely and in accordance with local code.