When a furnace quits in the middle of a Newmarket winter, most homeowners don’t have the luxury of researching contractors from scratch. Furnace repair is one of those services people only think about the moment they need it, usually when the house is getting cold and the temperature outside is dropping fast. Knowing who to call before that happens can save a stressful, sleepless night.
A good furnace repair technician does more than swap a broken part. They diagnose what actually failed, explain the cost before starting, and tell you honestly whether a repair makes sense or whether the furnace is old enough that replacement is the smarter long-term move. Licensed technicians also check for carbon monoxide risks tied to a cracked heat exchanger or bad venting, which is a safety step worth paying for, not skipping.
In no particular order, here is a list of the best Newmarket furnace repair companies:
NexGen Heating & Cooling Corp. is a family-run HVAC company that dispatches technicians throughout Newmarket and the surrounding North GTA, and furnace repair is one of the calls they field most once the weather turns cold. The company has passed RenovationFind’s credit, legal, and licensing checks, so homeowners aren’t gambling on an unknown when they pick up the phone. Technicians walk through what’s actually wrong with the furnace before recommending a fix, which matters most on a below-zero night when it’s tempting to just say yes to whatever gets the heat back on fastest. NexGen also services the newer high-efficiency and dual-fuel systems showing up in Newmarket’s newer subdivisions, not just older standard gas furnaces.
Key Services & Features
– Same-day and emergency furnace repair for no-heat calls
– Diagnostic testing for ignition, blower, and thermostat issues
– Furnace maintenance plans to catch problems before they cause a breakdown
– Heat pump and dual-fuel system service alongside standard gas furnaces
– Indoor air quality add-ons, including filtration and humidifier repair
– Upfront pricing before any work begins
“Nextgen exceeded all my expectations! From the initial consultation to the final installation, the entire process was smooth, professional, and stress-free. Their team was knowledgeable, courteous, and clearly cared about doing the job right. They took the time to explain all my options, helped me choose the most efficient system for my home, and delivered everything on time with no hidden costs. Berkan and christiqn was top-notch, and I’ve already noticed a big improvement in comfort and energy efficiency. I highly recommend nextgen to anyone looking for reliable, high-quality service. Five stars all the way!” — I. Candir, Google Reviews
2. Canco ClimateCare
Canco ClimateCare has been working out of its Gorham Street shop in Newmarket since 1984, so plenty of local homeowners already have a Canco sticker on their furnace from a past service call. What sets their repair visits apart is that every technician is a direct employee rather than a subcontractor, so the person diagnosing your furnace is the same one accountable for the fix. They back every repair with a 100% performance guarantee, and their approach leans toward fixing what’s actually broken instead of pushing a sale, which matters when a furnace is 10 or 12 years old and a homeowner is weighing repair against replacement.
Key Services & Features
– Furnace repair and no-heat emergency calls
– In-house technicians, not subcontracted labour
– 100% performance guarantee on repair work
– Furnace, air conditioner, and heat pump service
– Water heater and gas fireplace repair
– Serving Newmarket, Aurora, Bradford, and York Region since 1984
Customer Feedback
“The professionalism of Curtis was so refreshing — he got our furnace running again and it honestly restored our faith in humanity!”
-Verified Customer, HomeStars
3. Summers & Smith Cooling & Heating
Summers & Smith has been servicing furnaces in York Region since 1973, working out of their Aurora shop just down the road from Newmarket. As an authorized Lennox and Daikin dealer, their technicians see enough of those specific systems to recognize common failure points quickly instead of working through a generic checklist. Homeowners who’ve called them for a broken furnace tend to mention the same thing: no pressure to buy more than what’s needed. That tracks with a company that’s stayed family-run for five decades instead of turning into a sales-first operation.
Key Services & Features
– Furnace repair, including thermostat and control issues
– Authorized Lennox and Daikin service and parts
– In-house technicians for both residential and commercial calls
– Annual maintenance plans to reduce mid-winter breakdowns
– Air conditioning and ductless heat pump repair
– Serving Aurora, Newmarket, and York Region since 1973
Customer Feedback
“Our technician was knowledgable, prompt and friendly from the moment he walked in the door.”
-Verified Customer, HomeStars
4. David Brown Heating and Air Conditioning
David Brown Heating and Air Conditioning is an owner-operated business built on more than 15 years of hands-on HVAC experience, and Dave still shows up to a lot of the furnace calls himself. That owner-operator setup tends to show up in emergency situations — homeowners who’ve lost heat during a cold snap describe getting a same-day or next-day response rather than being put on a multi-day waiting list. Based out of Bradford, the company covers Newmarket and the rest of South Simcoe and North York Region, and its size means less back-and-forth between an office scheduler and the technician actually looking at your furnace.
Key Services & Features
– Emergency furnace repair and no-heat service calls
– Owner-operated with 15+ years of HVAC experience
– Residential, commercial, and industrial furnace service
– Straightforward, itemized pricing before repairs begin
– Air conditioning repair and seasonal maintenance
– Serving Newmarket, Bradford, and South Simcoe
5. Martino HVAC
Martino HVAC has been repairing furnaces across the region since 1987, and part of what keeps customers coming back is that you deal directly with the technician doing the work instead of a call centre relaying messages back and forth. They run 24/7 emergency service, which matters most for furnace repair specifically, since a no-heat call rarely waits for regular business hours. Martino is also an authorized partner in the Enbridge Sustain Program, so homeowners repairing an aging furnace can ask about available rebates in the same visit instead of researching it separately.
Key Services & Features
– 24/7 emergency furnace repair
– Direct communication with the technician on every call
– Heat loss calculations to right-size repairs and replacements
– Enbridge Sustain Program partner for rebate-eligible upgrades
– Maintenance and protection plans covering up to $1,500 annually
– Serving Newmarket, Aurora, Bradford, and Barrie
Customer Feedback
“JP is very professional and diagnose the issue for our furnace very quick and fix it in 10 mins.”
-Wong S., Google Review
What Services Do Newmarket Furnace Repair Contractors Offer?
– Diagnosing no-heat and intermittent heating breakdowns
– Igniter, flame sensor, and pilot assembly repair
– Blower motor and fan repair or replacement
– Thermostat and control board troubleshooting
– Heat exchanger inspection and carbon monoxide safety checks
– Gas valve and gas line repair
– Ductwork inspection when an airflow problem points beyond the furnace itself
– Furnace maintenance and tune-ups to prevent mid-season breakdowns
– Repair-vs-replace consultations for older units
Newmarket winters routinely dip well below freezing, and a furnace that’s been coasting on a marginal part for months tends to fail on the coldest night of the year, not the mildest. The town’s older homes near the historic downtown core often still run original or aging furnace equipment, while newer subdivisions further out have higher-efficiency systems with different failure points, like frozen condensate lines or finicky electronic ignition. A technician who works in Newmarket regularly knows which problem shows up in which kind of house, and is more likely to have the right part on the truck instead of ordering it and leaving your family without heat for another day.
How Much Does Furnace Repair Cost in Newmarket?
Furnace repair pricing in Newmarket typically starts with a diagnostic or service call fee, which many local companies credit toward the repair if you go ahead with the work. From there, cost depends entirely on which part failed and how much labour it takes to access it.
| Project |
Typical Cost Range |
| Diagnostic / service call fee |
$99 – $189 |
| Igniter or flame sensor replacement |
$150 – $300 |
| Thermostat repair or replacement |
$150 – $400 |
| Circuit board replacement |
$300 – $600 |
| Blower motor repair or replacement |
$400 – $1,500 |
| Gas valve replacement |
$300 – $600 |
| Heat exchanger repair |
$100 – $200 |
| General furnace repair call (parts + labour) |
$300 – $1,200 |
Most Newmarket HVAC companies charge an hourly labour rate somewhere between $80 and $150, with the average repair visit taking one to three hours once the technician is on-site. What pushes a quote higher is usually part availability (a same-day part costs more than one ordered in advance), after-hours or emergency timing, and the age of the furnace, since older units sometimes need parts that aren’t stocked locally. If a repair quote starts creeping past $600 to $800 on a furnace that’s already 12 to 15 years old, it’s worth getting a second opinion and asking whether replacement makes more financial sense. Collecting at least three itemized quotes before agreeing to anything beyond a basic part swap is always worth the extra day it takes.
How to Hire a Furnace Repair Contractor in Newmarket
- Describe the problem clearly before anyone arrives. No heat, weak heat, strange noises, and a furnace that won’t turn on at all are different problems, and a clear description helps the technician bring the right parts on the first visit.
- Confirm the technician is licensed to work on gas appliances. In Ontario, that means holding a valid TSSA gas technician licence — ask for it directly if it isn’t already listed on the company’s website.
- Ask whether the diagnostic fee is credited toward the repair. Many Newmarket companies waive some or all of it if you proceed with the fix.
- Get an itemized quote before any work begins. A verbal ballpark isn’t the same as a written breakdown of parts and labour.
- Ask about warranty coverage on both the part and the labour. A repair with no warranty at all is a red flag.
- For a furnace over 12 to 15 years old, ask for a repair-vs-replace comparison, not just a repair quote, so you can see the full picture before deciding.
Questions to Ask Before Hiring
Are you licensed to work on gas furnaces in Ontario?
Furnace repair almost always involves gas lines, venting, or combustion components, and Ontario requires a TSSA-certified gas technician for that work. A company that can’t confirm this on the spot shouldn’t be inside your mechanical room.
Is the diagnostic fee applied to the cost of the repair?
This is standard practice among reputable Newmarket companies, but it isn’t universal. Knowing the answer upfront avoids a surprise on the invoice.
Do you have the part in stock, or will this need a return visit?
On a genuinely cold day, this question matters more than price. A company that stocks common parts can often finish the job same-day.
What’s the warranty on this repair?
A good answer covers both the part itself and the labour to install it, typically for a defined period like 90 days to a year.
At what point would you recommend replacing instead of repairing?
An honest technician will give you a straight answer based on the furnace’s age and repair history, not just push whichever service pays more that day.
Frequently Asked Questions
How much does furnace repair cost in Newmarket?
Most furnace repairs in Newmarket cost between $150 and $1,200, depending on the part involved and how much labour it takes to access it. A simple igniter or flame sensor swap sits at the lower end, while a blower motor replacement or a gas valve issue can run closer to $1,000.
How do I know if my furnace needs repair or replacement?
Age is the biggest factor — a furnace under 10 years old is usually worth repairing, while one past 15 years with a history of repeat repairs often costs more to keep patching than to replace. A cracked heat exchanger is also typically a replacement signal, since it’s a safety issue rather than a simple part swap.
How quickly can a furnace repair company come to Newmarket?
Several local companies offer same-day or emergency service for no-heat calls, especially during winter. Response time depends on how busy the company is that day, so calling as soon as you notice a problem improves your odds of same-day service.
Is furnace repair covered under warranty?
It depends on the furnace’s age and whether the manufacturer’s parts warranty is still active, which is typically 5 to 10 years from installation. Labour is usually a separate warranty offered by the repair company itself, so it’s worth asking about both.
Why is my furnace blowing cold air?
This is usually caused by a failed igniter or flame sensor, a tripped limit switch, or a thermostat set to “fan on” instead of “auto.” It can also point to a bigger issue like a cracked heat exchanger, which is why a professional diagnosis matters instead of guessing.
How often should a furnace be serviced to avoid repairs?
An annual tune-up before the heating season starts is the standard recommendation, and it’s typically far cheaper than an emergency repair call in the middle of winter.
Choosing a Furnace Repair Contractor in Newmarket
Hiring a reputable furnace repair company matters more than most home service decisions, because a botched repair on a gas appliance isn’t just inconvenient, it can be dangerous. A carbon monoxide leak from a poorly repaired heat exchanger or improperly reconnected venting is a real risk, which is why licensing and experience aren’t optional details.
RenovationFind Certified companies go through a background check most homeowners don’t have the time or tools to run themselves. That includes credit and legal history checks, proof of business licensing and insurance, verified WCB coverage, and ongoing third-party monitoring for new complaints after certification. It’s a way of narrowing the field down to companies that have already shown they operate honestly.
If you’re not sure which of these companies is the right fit, or you’d rather get a few quotes side by side before deciding, post your project with RenovationFind and let vetted local contractors come to you.
RenovationFind Certified is a symbol of integrity held by only the most trustworthy companies in home improvement, service, maintenance. It increases consumer confidence in your business, giving you an edge over your competition while validating you as the best.
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This post first appeared on https://blog.renovationfind.com