Gas furnace
Lennox ML296V
96% AFUE, two-stage, variable-speed blower, 45,000 to 110,000 BTU
20-year limited heat exchanger warranty
Furnace Repair · Vaughan
Furnace Repair in Vaughan for Big Houses and Busy Shops
High-capacity furnaces, two-furnace homes and commercial units, fixed right
Furnace repair in Vaughan often means a 100,000 BTU unit in a Kleinburg mechanical room, one of two furnaces in a Maple custom home, or the heater keeping a Concord showroom open on a January morning. Big equipment fails in its own ways, from limit trips on long duct runs to staging faults that leave the far wing cold. Our TSSA-certified gas technicians diagnose the fault, quote it in writing and get the heat back, in Vaughan and across Ontario.
- TSSA-certified gas technicians for residential and commercial furnaces
- High-capacity, two-stage and variable-speed units diagnosed with meters, not guesses
- Written repair quote before we replace a single part
- Emergency furnace repair evenings, weekends and holidays
Voted Best Company 2019 to 2021 · Authorized Midea, Lennox, Kepler & Rinnai dealer, plus Goodman · 20+ years
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Furnace faults that show up in large Vaughan homes
Big houses and commercial spaces push a furnace harder. Here's what goes wrong and how we fix it.
One of your two furnaces quit and half the house is cold
Two-furnace homes usually split by floor, so a dead upstairs unit leaves the bedrooms freezing while the kitchen is fine. We diagnose the failed furnace on its own, from ignitor to board, and check that the working one isn't about to follow it.
The furnace runs for hours and the far bedrooms never warm up
Long duct runs in a wide house lose pressure before the last registers. We measure static pressure and temperature at the far end, check for crushed or disconnected runs in the basement ceiling and adjust the blower before anyone talks about a bigger furnace.
The high-capacity furnace keeps tripping its limit switch
A 100,000 to 120,000 BTU furnace needs a lot of return air. A loaded four-inch media filter, closed registers in unused rooms or an undersized return starves it, and the limit shuts the burners off. We clear the restriction and test the temperature rise.
Your Concord shop opens at nine and the furnace is dead at eight
Commercial furnaces and unit heaters get the same diagnosis as a home furnace, with your hours in mind. Tell us when you open and we'll work the repair around it where we can.
A thumping rumble when the burners light
Delayed ignition on a big furnace is loud, and it strains the heat exchanger every time. We clean the burners, check gas pressure and the ignition timing, and inspect the exchanger before the furnace goes back in service.
The variable-speed furnace flashes a code and won't stay on after a storm
Power surges hit control boards and ECM blower modules first. We read the code, test the board, the module and the motor separately, and replace only the part that failed.
Water on the mechanical room floor from the furnace
High-efficiency furnaces make condensate, and in big homes the drain line often runs a long way to a pump or a floor drain. A clogged trap, a failed condensate pump or a frozen outdoor section are the usual causes, all fixable the same visit.
The humidifier on the furnace is leaking or the house is bone dry
Large homes with lots of glass dry out fast in winter. A scaled pad, a stuck solenoid or a cracked water panel is a quick fix, and we check the humidistat setting so the windows don't fog.
Sound familiar?
Describe the problem and we'll tell you what it usually is, what it costs to fix, and whether it's worth fixing.
Furnace repair cost in Vaughan
Every repair is quoted after diagnosis so you pay for the part that failed. If the furnace is past saving, two-stage replacements up to 120,000 BTU start from $3,300 installed.
| Service | Typical price in Vaughan |
|---|---|
| Furnace repair Diagnostic visit plus common parts such as ignitors, flame sensors and capacitors | Quote after diagnosis |
| High-efficiency furnace, installed Lennox ML296V or Midea MGH96, 96% to 97% AFUE, two-stage variable-speed | From $3,300 |
Installed pricing depends on size and installation requirements, and every job gets a written, guaranteed quote. Qualifying cold-climate heat pumps can bring back up to $7,500 through the Home Renovation Savings Program, and financing runs 0% for 3, 6 or 9 months on approved credit.
How a furnace repair visit in Vaughan runs
Whether it's a custom home or a commercial unit, the process is the same.
- 1
Tell us what you've got
The symptom, the code on the LED, and whether it's a home, a two-furnace home or a business. We give you a booking window and the diagnostic fee up front.
- 2
Diagnose the whole system
A TSSA-certified tech tests ignition, flame signal, gas pressure, the blower, static pressure and the staging. On two-furnace homes we check both units.
- 3
Written quote before work
The repair price in writing, with a replacement price beside it if the furnace is old enough or undersized for the house.
- 4
Repair and verify at the far end
After the fix we run the furnace on both stages, test CO at the registers and check that heat is reaching the rooms farthest from the mechanical room.
High-capacity furnaces we install in Vaughan
When a repair doesn't add up, these two-stage, variable-speed furnaces go up to 120,000 BTU, enough for the biggest custom homes.
Gas furnace
Lennox EL297V
97% AFUE, two-stage, variable-speed blower
20-year limited heat exchanger warranty
Gas furnace
Midea MGH96
96.5% AFUE, two-stage, variable-speed, 60,000 to 120,000 BTU
Registered warranty, up to 12 years parts and labour on select systems
Gas furnace
Goodman GMVC96
Up to 96% AFUE, two-stage, variable-speed ECM blower, 40,000 to 120,000 BTU/h input
10-year parts and unit replacement limited warranties when registered online
What's included in a Vaughan furnace repair visit
A big furnace gets a full workup, not a quick reset.
- Ignition sequence, flame sensor signal and gas valve tested
- Gas pressure and temperature rise checked against the rating plate
- Static pressure measured, with filter, return and far-register airflow checked
- ECM blower motor and control module tested separately
- Two-stage operation confirmed on low and high fire
- Condensate trap, pump and drain line cleared on high-efficiency units
- Carbon monoxide tested at the registers after the repair
- Written repair quote, plus a replacement quote for furnaces past 15 years or undersized for the home
Is a big-home furnace worth fixing? The Vaughan version of the rule
The usual repair-or-replace rule looks at age and the cost of the part. In a large Vaughan home we add a third test: was the furnace ever the right size and type for this house? A lot of custom homes got a single-stage furnace that was sized by the square footage and installed before the glass went in. It has been short cycling and leaving the far wing cold since day one.
If that furnace is under 12 years old and the fault is an ignitor, a flame sensor, a capacitor or a pressure switch, repair it and move on. If it's past 15 years and the failure is a heat exchanger, an inducer motor or a control board, the repair can cost a big share of a new unit, and you'd still own a furnace that doesn't fit the house.
That's when a two-stage, variable-speed furnace sized from a real heat-loss calculation earns its keep. On low fire it runs long and quiet, pushes air to the end of every duct run and stops the on-off swings. For homes with two furnaces, we often pair each one with a cold-climate heat pump as a hybrid, so the gas burns only on the coldest Ontario nights. For a Concord business, the same math applies, with your opening hours on the calendar.
- Under 12 years and a routine part: repair
- Past 15 years and a major part: see both prices
- Single-stage and undersized for the glass and the duct runs: talk about replacement
- Cracked heat exchanger at any age: replace
Read more about what we check on every visit on our Ontario furnace repair and maintenance page, or see everything we do for homes and businesses on the HVAC Vaughan page.
What it costs, and how we keep it lower
Guaranteed pricing
Your quote is your final price. No surprise extras on the agreed scope of work.
Rebates up to $7,500
Cold-climate heat pumps may qualify through the Home Renovation Savings Program. We confirm eligibility and file the paperwork.
0% financing
Interest-free for 3, 6 or 9 months, or open loans from 2.99% on approved credit.
Up to 12 years parts and labour
Extended warranty on select systems when registered.
Want the real number for your home?
A guaranteed quote takes one visit. Rebate and financing options come with it.
What Vaughan homeowners can expect: our customers in their own words
Rated 4.5 on Google and voted Best Company 2019, 2020 and 2021 on HomeStars.
4.5Google rating from verified customers
We had a heat pump/AC unit installed by EHI, on time, on budget, great workmanship. Julian and team were knowledgeable and courteous. Dustin communicated well and is managing our government rebate for the new efficient system. Thank you Team!
Replaces our AC with a new heat pump in Ottawa and the whole experience was outstanding. From the first call, Dustin was incredibly responsive and communicated clearly every step of the way. He cut through all the usual sales fluff and got straight to what mattered — options, costs, timelines, and what made the most sense for our home. They addressed every concern I had, explained the details discussed my technical questions, and handled the installation quickly and professionally. The quality of the work is excellent, everything was done cleanly, and the system has been running perfectly since. Pricing was fair and transparent, and there were no surprises. It’s rare to find a company that combines speed, honesty, and solid workmanship like this. Highly recommended.
Recently got a shiny new heat pump installed. Went very well, nice unit and it works soooo quietly. These fine folks were very easy to deal with, professional and thourough. Would highly recommend.
Efficient Home Improvements truly went above and beyond. Our furnace failed on Christmas Eve in Ottawa, and their team stayed up late (3:00am) that night to replace it. Their responsiveness, professionalism, and dedication during the holidays were exceptional. The work was completed efficiently, and everything was explained clearly. It’s rare to find a company willing to sacrifice their own holiday time to ensure a customer’s home is warm and safe. I highly recommend Efficient Home improvements to anyone in need of reliable and compassionate service.
I recently had a new furnace and tankless water heater installed by this company. Excellent service by both office and technicians , I highly recommend!
The Installers were great.. Got in and got the job done..the furnace works amazing compared to the old one !!! Need a furnace..A/C water tankless system..there your guys!!!!
Had a tankless water heater installed and couldn’t be happier. The installation was quick, professional, and the system works great — endless hot water and more efficient than my old tank. Highly recommend!
Dustin and his team were really responsive and helpful in getting us a new heat pump to replace our broken AC unit. The team went above and beyond helping us through the process and answering other questions about the house we recently moved in to. I would highly recommend Efficient Home Improvements for any of your HVAC needs.
Licensed HVAC Contractor · Serving Ontario for 20+ Years
Proudly Serving Vaughan, Ontario
EHI Heating And Cooling has kept Ontario homes and businesses comfortable for more than 20 years. Our licensed crews come to your home or business anywhere in Vaughan, with a written, guaranteed quote before any work starts.
- ServingVaughan, Ontario
- Phone1-647-694-5845
- Emailefficienthomecomfort@gmail.com
Business Hours
- Monday8:00 AM to 8:00 PM
- Tuesday8:00 AM to 8:00 PM
- Wednesday8:00 AM to 8:00 PM
- Thursday8:00 AM to 8:00 PM
- Friday8:00 AM to 8:00 PM
- Saturday8:00 AM to 8:00 PM
- Sunday10:00 AM to 5:00 PM
Emergency service available evenings, weekends and holidays.
More HVAC help in Vaughan and nearby
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Frequently asked questions
How much does furnace repair cost in Vaughan?
Furnace repair in Vaughan is quoted in writing after diagnosis, and the price depends on the part. Flame sensors, ignitors and capacitors are small repairs, while ECM blower modules, inducer motors and control boards cost more. A new two-stage furnace starts from $3,300 installed if replacement is the better call.
How soon can a technician get to my furnace in Vaughan?
We book furnace repair in Vaughan Monday to Saturday and on Sundays, with emergency service evenings, weekends and holidays. You get a booking window when you call, and we don't promise an arrival time we can't control.
Do you repair furnaces for businesses in Concord?
Yes. We repair furnaces, unit heaters and rooftop units for shops, showrooms, offices and warehouses in Concord and across Vaughan, and we can work around your business hours for the repair.
Why does my large house have cold rooms even though the furnace runs all day?
Long duct runs lose pressure before they reach the far rooms, and a single-stage furnace short cycles before the air gets there. We measure static pressure and airflow at the far registers, then fix the ducts, the blower setting or the furnace staging rather than guess.
What if only one of my two furnaces is working?
Call us with the symptom and which floor is cold. We diagnose the failed furnace on its own, quote the repair in writing and check the second furnace while we're there so you don't lose both in the same week.
Do you offer emergency furnace repair in Vaughan?
Yes. Emergency furnace repair in Vaughan is available evenings, weekends and holidays at 1-647-694-5845. If you smell gas or a carbon monoxide alarm goes off, leave the building and call 911 before you call us.
Page reviewed and updated October 27, 2026. Prices, rebates and program terms are checked at each update.