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 · Markham
Furnace Repair in Markham, From No Heat to Uneven Floors
Two-stage, variable-speed and zoned furnaces fixed properly
Furnace repair in Markham is rarely just a dead furnace. More often the furnace runs, but the basement stays cold, the second stage never kicks in or a zone damper is stuck half open. Our TSSA-certified gas technicians diagnose two-stage, variable-speed and zoned systems across York Region and the rest of Ontario, and you see the repair price in writing before we pick up a tool.
- TSSA-certified gas technicians on every call
- Two-stage, ECM blower and zoning faults diagnosed with a meter, not a guess
- Written repair quote before any work starts
- Evening, weekend and holiday emergency service
Voted Best Company 2019 to 2021 · Authorized Midea, Lennox, Kepler & Rinnai dealer, plus Goodman · 20+ years
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Furnace problems we see most in Markham homes
Two-storey houses from the 1980s to the 2010s share the same handful of furnace faults. Here's how each one shows up and what we do about it.
The furnace runs, but only on low, and upstairs never reaches the set point
A two-stage furnace needs a second-stage call from the thermostat or a timer on the board to step up. A missing W2 wire, a wrong thermostat setting or a failed high-fire pressure switch keeps it stuck on low. We test the staging and fix the link.
The blower hums or clicks but won't spin
Variable-speed furnaces use an ECM motor with its own control module. Either the module or the motor can fail on its own. We test both so you replace the part that died, not the whole assembly.
One floor roasts while the other freezes, even with zoning
Zone dampers stick, damper motors burn out and zone boards lose a stage. We cycle each zone, watch the dampers move and check the bypass so the furnace isn't fighting a closed duct.
The furnace quits during a February cold snap and shows a pressure switch code
On a high-efficiency furnace that code usually means the condensate line or the exhaust pipe has iced up outside. We clear it, fix the slope or the termination, and get heat back the same visit.
The furnace cycles on and off every few minutes in a house with an open foyer
Big open stairwells trick a main-floor thermostat into satisfying early. An oversized furnace makes it worse. We check the limit switch, the thermostat location and the temperature rise before suggesting anything.
Your Markham Village furnace is 20 years old and makes a bang on start-up
Delayed ignition on a mid-efficiency furnace means gas is pooling before it lights. It can stress the heat exchanger. We clean the burners, check the ignition and inspect the exchanger before it runs again.
No heat and a flashing code after a power blip
Control boards lock out after a flame fault or a power surge. A reset often clears it, but we confirm what tripped it, because a lockout that keeps coming back is a flame sensor, a grounding fault or a failing board.
The furnace room smells like gas or you got a CO alarm
Leave the house and call 911 before you call anyone else. Afterwards we inspect the heat exchanger, venting and gas connections and test the furnace before it goes back in service.
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 Markham
Repairs are quoted after we diagnose the fault, so you pay for the part that failed and not a guess. If the furnace is near the end, a new two-stage furnace starts from $3,300 installed.
| Service | Typical price in Markham |
|---|---|
| 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.
What a furnace repair visit in Markham looks like
Tell us what the furnace is doing and what the LED is flashing. The rest follows.
- 1
Book and describe the symptom
No heat, cold basement, short cycling or a code. We book a window with you and tell you the diagnostic fee up front.
- 2
Diagnose both stages
A TSSA-certified tech checks ignition, flame signal, gas pressure, static pressure, the ECM blower and the staging. On zoned homes we test every damper.
- 3
Quote the fix in writing
You get the repair price before any work, and a replacement price if the furnace is old enough that it matters. You choose.
- 4
Repair, test and balance
We make the repair, run the furnace through a full cycle on low and high fire, check CO at the registers and confirm each floor is getting air.
If repair isn't worth it: furnaces we install in Markham
Two-stage, variable-speed furnaces that run on low most of the time, which is the quiet, even heat a two-storey house wants.
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 Markham furnace repair visit
Every diagnostic covers the whole furnace, not just the part that stopped.
- Thermostat, wiring and staging check, including the W2 call on two-stage furnaces
- Ignition sequence, flame sensor signal and gas valve operation
- Gas pressure and temperature rise measured against the rating plate
- ECM blower motor and module test, plus static pressure on the ducts
- Zone dampers, damper motors and zone board cycled on zoned homes
- Condensate trap, drain and vent termination cleared on high-efficiency furnaces
- Carbon monoxide test at the registers after the repair
- Written repair quote, and a replacement quote if the furnace is past 15 years
Fix it or replace it: three questions we ask in Markham
A furnace repair is a good deal when the part is cheap, the furnace is young and the furnace actually suits the house. Most Markham homeowners only think about the first two. The third one matters just as much in a two-storey home.
First, how old is it? Ignitors, flame sensors, capacitors and pressure switches are routine on a furnace under 12 years old. Second, what failed? A heat exchanger, an inducer motor or a control board on a furnace past 15 years can cost a big slice of a new unit, and the old furnace still burns gas at its old efficiency afterwards.
Third, is it the right furnace for the house? A single-stage furnace that short cycles in an open-plan home with hot bedrooms upstairs was never going to even out the floors. In that case a repair buys another winter of the same complaint. A two-stage, variable-speed furnace sized from a heat-loss calculation, or a hybrid heat pump setup that uses the furnace only in deep cold, fixes the comfort problem and the gas bill at the same time.
- Under 12 years and a routine part: repair
- Past 15 years and a major part: compare both prices
- Wrong size or single-stage in a two-storey home: talk about replacement
- Any furnace with a cracked heat exchanger: replace
We quote both options every time, with no pressure either way. See how we approach furnace repair and maintenance across Ontario, or the full list of what we do for Markham HVAC customers.
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 Markham 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 Markham, 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 Markham, with a written, guaranteed quote before any work starts.
- ServingMarkham, 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.
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Frequently asked questions
How much does furnace repair cost in Markham?
Furnace repair in Markham is quoted in writing after diagnosis, so the price depends on the failed part. Ignitors, flame sensors and capacitors are small repairs, while ECM blower modules, inducer motors and control boards cost more. If replacement makes more sense, a new high-efficiency furnace starts from $3,300 installed.
How soon can you get to a furnace repair in Markham?
We book furnace repair in Markham during business hours Monday to Saturday and on Sundays, and we take emergency calls evenings, weekends and holidays. We give you a booking window when you call rather than promise an arrival time we can't control.
Why does my furnace heat the main floor but not the upstairs bedrooms?
Usually the thermostat on the main floor satisfies before the second storey catches up, or a two-stage furnace is stuck on low fire. We test the staging, check static pressure and look at the zone dampers if you have them, then quote the fix.
Do you offer emergency furnace repair in Markham?
Yes. Our emergency furnace repair covers Markham evenings, weekends and holidays. If you smell gas or a CO alarm sounds, leave the house and call 911 first, then call us at 1-647-694-5845.
Is a two-stage furnace worth it in a two-storey Markham home?
Yes, for most two-storey homes. A two-stage, variable-speed furnace runs on low fire most of the time, which keeps air moving to the upper floor and the basement longer and cuts the on-off swings that leave rooms uneven. Lennox and Midea two-stage furnaces start from $3,300 installed.
Can you tune up my furnace at the same visit?
Yes, if you ask when you book. A furnace tune-up covers burner cleaning, flame sensor, gas pressure, temperature rise, the blower and the condensate drain, and keeps most manufacturer warranties valid. Fall is the best time, before the first cold snap.
Page reviewed and updated October 27, 2026. Prices, rebates and program terms are checked at each update.