Call 905-471-1748 for Fast Service
Asset X - Markham Heating & HVAC
Asset X - Markham Heating & HVAC
drain

Furnaces

drain

Hot Water Heaters

drain

Air Conditioning

drain

Humidifiers

drain

Heat Pumps

drain

Air Cleaners

drain

Combi Boilers

drain

Gas Fireplaces

drain

Tank and Tankless Water Heaters

drain

Pool Heaters

Home / Furnaces / Furnace Maintenance

Catch the small problems now, before the first cold

Night finds them.

A furnace can seem fine in October and quit in January. Our 18-point tune-up cleans, tests and safety-checks your system, then tells you in plain terms what’s in good shape and what needs attention.
★★★★★Google100+ 5 Star ReviewsAll makes and modelsHelps keep your warranty in good standing
Tech Cleaning Furnace Burners Markham Logo - Markham Heating & HVAC

Why Choose Markham Heating and Air Conditioning Systems

Family-owned since 1983

Markham Heating & Air Conditioning Logo - HVAC Services

TSSA-Registered

Markham Heating & Air Conditioning Logo - HVAC Services

WSIB Registered

Logo - Markham Heating & HVAC

1000+ Training Hours

White Crossed Tools Logo - Markham Heating & HVAC

100+ 5 Star Reviews

Google G - Markham Heating & HVAC
Why a tune-up matters

Mild weather hides problems. The first cold snap finds them.

In the fall, a furnace only runs in short bursts. A dirty flame sensor, a weak ignitor or a clogged filter can go unnoticed until it has to run for hours on a freezing night, and that’s when it shuts down.

A yearly tune-up finds those problems while they’re small, usually cheaper to fix, and before the winter rush. It’s also when we check the parts you can’t see, like the heat exchanger and carbon monoxide levels, so you know the furnace is safe to run all season.

Tom Customer - Markham Heating & HVAC
Our 18-point tune-up

What we check, clean and test

From the thermostat to the vent pipe, every part of the heating cycle gets looked at.

Safety

  • Heat exchanger inspection for cracks
  • Carbon monoxide test
  • Gas pressure check and adjustment
  • Gas leak check at the furnace
  • Venting and flue inspection
  • Limit and rollout safety switches

Ignition and Burners

  • Ignitor test
  • Flame sensor cleaning
  • Burner inspection and cleaning
  • Full startup and shutdown sequence

Airflow

  • Filter check and replacement
  • Blower motor and wheel inspection
  • Temperature rise across the furnace
  • Motor amp draw

Controls and Drainage

  • Thermostat operation
  • Electrical connections tightened
  • Condensate drain and trap flushed
  • Control board and error code history

Red Tag Removal Service in Markham

Got a red tag? Don’t let anyone scare you into a rushed $10,000 decision. A red tag means a safety issue was found — not that your system is automatically done. We provide honest, independent red tag assessments so you know exactly what’s wrong, what’s required, and what your real options are. No pressure. No upsell. Just answers.

How it works

In 45 minutes to an hour, you'll know exactly where your furnace stands.

You’ll know what’s wrong and what it costs before we start.

01

Book a time

Online or by phone. Early fall is best, before the heating season gets busy.

02

Clean, test, inspect

We work through all 18 points. Most tune-ups take 45 minutes to an hour.

03

A straight answer

We walk you through what’s in good shape and what needs attention, in plain terms.

04

You decide on any fixes

If something needs repair, you get the price first. Nothing extra gets done until you say yes.
Two ways to book

Book once, or put it on a schedule you don't have to remember.

Most of our customers choose a plan. The tune-up is included, you’re first in line when it’s cold, and repairs cost less.
One-Time Tune-Up
$135$149
Our full 18-point furnace tune-up, once. Good if you just want this year's check.
Book a tune-up
Best Value
Core Comfort
$20/monthOR $240 / yr + tax
Annual furnace tune-up, priority scheduling and repair discounts. Premier plan also available.
Posted on Google Google
Nick/Maria Addante profile picture
Nick/Maria Addante
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We had our gas furnace and two fireplaces serviced for the upcoming winter season. Our technician Tom was very professional, knowledgeable and courteous. We are definitely planning to use Markham Heating & Air Conditioning again in future.
Posted on Google Google
Lawrence profile picture
Lawrence
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great communication and great service. Tom and Mitchell were very professional. Found the issue quickly and had it repaired quickly
Posted on Google Google
Teresa Muto profile picture
Teresa Muto
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Great service! Had a pool heater repaired, done fast and a lot less then I had been quoted by other places.
Posted on Google Google
Allan Tieu profile picture
Allan Tieu
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
My wife and I are so glad to have had the team at Markham HVAC replace our combi water heater and humidifier. They were fantastic from my first interaction with them to when they finished. Vijay, Mitchell and Todd were accommodating to our needs, thorough and knowledgeable when it came to explaining what was being installed, how they would install it and what the next steps were. The crew were extremely respectful of both my time and home and did their absolute best to make sure my home was as clean when they finished. We hit some roadblocks during the install but again, Vijay and Mitchell were always transparent with the whole process. We highly highly recommend this team as they know what they’re doing, they’re extremely professional and easy to reach at any time of day with quick responses. Thank you again for all your help! We will be reaching out for any other HVAC upgrades to our home.
Posted on Google Google
Gianfranco profile picture
Gianfranco
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Mitchell was excellent in explaining and servicing our multiple mini splits. The service was thorough, well priced, and informative. We will definitely be calling Markham Heating & Air Conditioning next year for our yearly maintenance.
Posted on Google Google
edwardwhitfield1 profile picture
edwardwhitfield1
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Installation of my furnace was prompt, efficient, and very courteous. I highly recommend Markham Heating and Air Conditioning.
Posted on Google Google
James Guy profile picture
James Guy
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Excellent friendly service! After the first visit my HVAC issue wasn’t completely solved, but there was fast follow up to resolve the issue the following day, with no hassle. I highly recommend!!
Posted on Google Google
Abdool Karim profile picture
Abdool Karim
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Tom the technician arrived on time and was very pleasant, professional, and truly knowledgeable. He serviced my water heater, furnace, and A/C. He explained every step in the process and gave me valuable advice. Markham Heating has been replacing and servicing my equipment for the last 20 yrs and I have always had outstanding service
Posted on Google Google
Miles Buchanan profile picture
Miles Buchanan
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Mitchell showed up, diagnosed the issue quickly and correctly and had me all fixed up in no time. As always stellar service!
Posted on Google Google
Mark Shnier profile picture
Mark Shnier
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
I had a wonderful experience working with Markham HCAC. I had called them in because the master bedroom was just way too hot in the summer despite me having a very up-to-date heat pump and furnace set up for the whole house. Their technician, Mitchell, came in and we tried to find if there was any easy solution with improving the ventilation, but the master bedroom being on the second floor at the opposite end of the house was just too far from the main central system to get enough airflow on those really hot summer days. So in the end they recommended the only solution was a ductless split system, and they treated that time spent with me as a sales call as opposed to charging me for their time. I wanted my own Electrician to run the electrical to the termination point outside and once I had that arranged, the installation was done very quickly and I'm very happy with the result. They also did a beautiful job with the "line hide", As you can see from the pictures, we decided it would look best if they ran it upright tight against the vertical downspout and it came out looking very clean outside.
Related services

More ways to keep your home warm

Clock - Markham Heating & HVAC

Furnace Repair

No heat or something not right? We find the cause and give you the price before we start.
Clock - Markham Heating & HVAC

Furnace Installation

Time for a new one? We size it to your home and give you options in writing.
Clock - Markham Heating & HVAC

Humidifiers

Dry winter air? A whole-home humidifier works with your furnace to keep things comfortable.

Furnace maintenance questions

How often should my furnace be serviced?
Once a year. Early fall is ideal, before you need the heat every day, but a tune-up any time is better than none.
Do I need maintenance to keep my warranty?
Many manufacturers ask for proof of yearly professional maintenance before they’ll cover a warranty claim. We keep a record of every visit, so you have it if you ever need it.
How long does a tune-up take?
Most take 45 minutes to an hour. If we find something that needs attention, we’ll explain it before you decide on anything.
What happens if you find a problem?
We show you what we found and give you the repair price. Nothing extra gets done until you say yes. If it’s a safety issue, like a cracked heat exchanger, we’ll explain exactly what it means and what your options are.
Do you service all furnace brands?
Yes. We tune up most makes and models, no matter who installed them.
Is a plan worth it over a one-time tune-up?
If you’d like the tune-up done every year without thinking about it, usually yes. The plan includes your annual tune-up, plus priority booking when it’s cold and discounts if a repair comes up.

Furnace maintenance across Markham and York Region

Based in Markham, serving homes nearby since 1983.
Hvac Contractor In Vaughan On - Markham Heating & HVAC

Markham

HVAC Contractor in Stouffville, ON

Stouffville

Images - Markham Heating & HVAC

East York

Hvac Contractor In Richmond Hill On - Markham Heating & HVAC

Richmond Hill

Thornhill - Markham Heating & HVAC

Thornhill

Toronto - Markham Heating & HVAC

Toronto

Markham Heating & HVAC

Scarborough

Hvac Contractor In Aurora On - Markham Heating & HVAC

Aurora

Images - Markham Heating & HVAC

Uxbridge

Yostyork - Markham Heating & HVAC

North York

Book your tune-up before the cold does it for you.

Under an hour now can save you a cold night later. Book online or give us a call.
Mon to Fri 8 am to 6 pm · Saturday emergency no-heat service available
Team Equipment Haul - Markham Heating & HVAC
📅 Book an Appointment 📞 (905)-471-1748