Toronto Furnace Repair

If you’re looking for expert care for your furnace, Dr HVAC can help.

We repair furnaces of any make and model, install high-efficiency replacements, and provide yearly tune-ups that keep a furnace running longer. We also work with boilers, hydronic heat systems and heat pumps.

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(905) 457-4425

Fast, Friendly Service in Toronto

Our Toronto office is located minutes from Riverdale, Leslieville, the Danforth, Leaside and the Beaches. Most calls get a licensed technician to your door in four hours or less.

Toronto’s older housing means mixed systems. Forced-air furnaces, combi boilers, and conversions between the two, often in a basement with no room to work. We are in those houses every week.

Best of all, we provide a 100% satisfaction guarantee on our work. We promise the work will be done correctly, or we will fix it for free.

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Years in Business

2,105

Reviews

4.8

Avg Google Rating

Recently I had a technician from Dr HVAC help me with a furnace problem. The technician took the time to explain to me what was going on, and to suggest my next course of action in dealing with the situation. I am grateful that he worked hard to help me understand.
Sandor A.
Toronto, Ontario

Toronto

397 Donlands Ave, Unit 105
East York, ON M4J 3S3

(905) 457-4425

Client Spotlight

Darrell’s furnace never seemed to shut off

His Etobicoke home was warm enough, but the system ran almost constantly. Here is what we found in the basement, and what changed after the new furnace went in.

Read the story

Our Heating Services

Boiler Repair

When your heating system starts leaking or breaks down in the middle of the night during the coldest time of the year, you need fast service. We repair any make or model of gas, propane or electric furnace.

Learn more about furnace repair in Brampton and Mississauga.

Learn About Boiler Repairs

New Furnace Installation

Our professional service technicians will help you select the right furnace for your home. We have a great selection of reliable, efficient furnaces to choose from, depending on your home size, energy efficiency requirements and your budget. We are authorized Trane dealers and will ensure a perfect installation so you get the most out of your furnace. Learn more about our furnace installation services.

Learn About Furnace Installation

Furnace Tune-Ups and Maintenance

Just like your car, your furnace needs annual maintenance to work efficiently and reach its full working life span. It costs surprisingly little (especially if you take advantage of our tune-up special). And you know what? It will save you money and headaches as well! Learn more about furnace maintenance here.

Get a Furnace Tune-Up

What Our Customers Are Saying2,500+ Five Star Google Reviews

Leah H.

3 months ago

Bryan was very thorough and professional. He made all of the arrangements for the next required steps so I didn’t have to worry about a thing. This is why I always call Dr. HVAC. UPDATE Just had a new water heater installed my Chris and Steve. They were fast, reliable and professional. You can’t go wrong with Dr. HVAC!
UPDATE – as always, Dr. HVAC is my go to. Ty was polite, professional and thorough!

Patricia L.

3 months ago

Would highly recommend this company very fast in booking an appointment, was easy to book. The gentleman that can was very polite and did an excellent job. We are definitely call in the future if we have any other problems.

Lois L.

4 months ago

Kurtis was great! Given a window of 4 pm to 8 pm and he shows up right at 4 pm! Courteous, professional and knowledgeable, as well as friendly, great conversation as he did his work on the Air con.
A pleasure having someone like this enter my home to take care of maintenance, thanks Kurtis🙏🏻

Terry B.

4 months ago

I would highly recommend this company and their employees gill is the best, very professional and thorough couldn’t ask for a better man to do the job.

Jennifer S.

4 months ago

The technician who visited me this morning, Riley, O’Malley, was very pleasant, answered all my questions clearly and made sure that I understood his answers and reassured me that my system is functioning properly. I certainly would recommend Dr. HVAC to friends and neighbors. How would I do? Don’t wanna add photos

Ava W.

4 months ago

If you want to remove negative reviews from your Google Business, contact me via my profile; my contact details are listed there. After work you can pay..

Mel

4 months ago

Tyler came by to check my AC unit that wasn’t working and diagnosed the electrical problem very quickly! He was polite, informative and extremely helpful throughout the process. Super efficient! Would definitely use this company again for HVAC work

Prakash

4 months ago

Harjor was excellent, really appreciated his help fixing our thermostat by installing the fast stat.

Diana P.

4 months ago

My visit with Bryan Malloch from Dr HVAC, was an extremely positive, intuitive and delightful experience. Bryan arrived on time, introduced himself to me, had indoor booties ready to slip on over his shoes, and was ready to find a solution to my problem. Not only did he solve the issue, he was attentive to all the other mechanical appliances around him. He offered solid advice to prevent future problems and he was extremely clean, he did not leave any mess! I was absolutely delighted with Bryan and the service and will use Dr HVAC again in the future! 10/10

Ann M.

4 months ago

Adam Miles from Dr HVAC Plumbing was great. Efficient, knowledgeable, and a very nice guy. He sorted out my toilet and did a camera check on my basement drain. He’s the best!

Gautam G.

6 months ago

Noah from Dr HVAC did an excellent job servicing my AC unit yesterday. He was professional, thorough, and clearly knowledgeable. What really stood out was how he went above and beyond—taking the time to walk me through maintenance tips not just for the AC, but also for my heater and water heater. I really appreciated the extra care and advice. Highly recommend!

Ava D.

6 months ago

Thank you Dr HVAC for the speedy response and sending out a Service Technician so promptly when our hot water tank stopped working. Contact with office was smooth, both texts and emails were sent to confirm appointment. Received updates letting me know when Technician was on the way and was on time! Our Tech Lyndon quickly diagnosed issue, gave us options and went to work to fix the problem. Great communicator, friendly and happy to answer all questions along the way. We will definitely call Dr HVAC again when in need and request Lyndon for future calls. Thanks again for the amazing service!
Ivana J.

bill x

7 months ago

Dr HVAC merits the 5 stars. It was my first time having them come, and I was quite impressed. Jamie was excellent both in communicating in great detail the various options and prices on fixing or replacing an old tankless water heater. She was so helpful and professional, and her work was meticulous. My first phone call to the company was very easy and friendly. I plan to use the company for recurring maintenance and future projects. Thank you.

Mark M

7 months ago

Sherman recently fixed our HVAC system and did an impressive job. He was very knowledgeable and knew exactly what to do to replace a broken part and get the system back up and running quickly. He was polite, respectful and thoroughly cleaned up his work space.

After the installation, he carefully checked the radiators throughout the house to ensure each one was working as expected. This process led to a few adjustments in the boiler room, but he handled everything like the seasoned professional he is.

Sherman provided white glove service and I would definitely give him a five star rating! I would be very happy to work with Sherman again!

Kelly W.

7 months ago

Sherman and NJ were amazing. They were extremely polite, efficient and professional. They got the job done on a Saturday in just a few hours. We will definitely be using their services again for any plumbing work in our home. Thanks guys!

WooHyun J.

8 months ago

Our heater broke down during the coldest week of the year, and we had to replace it quickly. This company was fantastic from start to finish.

Gary, Chris, and Binny were thorough and professional. Adam explained everything clearly and kindly. Marcus went above and beyond – his skill and perseverance solved our pipe issues, and his kindness truly stood out.

This is a wonderful company with a team that truly cares. Highly recommend.

Michael M.

9 months ago

My boiler stopped operating earlier this month. I placed a call to Dr. HVAC late at night and given that I was without heat, they sent a technician early the next morning. Bryan checked out the boiler and advised that it would need several new components. The cost was such that it made more sense to replace the entire boiler. As the boiler was older and I had not been happy with it for some time, I accepted this diagnosis. Within an hour, Jennifer from Dr. HVAC arrived to discuss my options for a new boiler. We quickly settled on one, I was happy with the price, and early the next day Sherman and Garey arrived to install the new boiler. By that evening we had heat and hot water. Separately, Sherman also adjusted the manifold feeding radiant heat to an ensuite bathroom, providing floor warmth that we had done without for many years. Overall, my wife and I were very grateful for the prompt service and extremely pleased in our dealings with all four of the people from Dr. HVAC.

Kitty Q

10 months ago

(WORST EXPERIENCE EVER) Update as of December 12, 2025:
It has been 4 months since our AC broke – not that we need it now given its mid-December. However, two repair technicians arrived today, pulled more parts off of our AC, left them on the floor, left other parts in stair wells and then left without a word to anyone! The also left the AC completely uncovered with wires sticking out everywhere. (See Photos)
This is completely unprofessional and disrespectful. Our “brand new” AC has now been broken for 4 months! We are also mind blown that they would not only leave the house and stop working without letting any of us know, but to also leave parts all over the place. We called them and their admin has no idea what is going on.
Highly recommend buying your AC from anywhere else. Worst experience we have ever had! They have continuously not respected my elderly father.

Update: Two weeks later we have still not received a call back from a manager and our AC is currently in this state, unusable (see photo).

——

Original Review

Our brand new $9000 air conditioner which was installed less than six months ago started pouring water through the air vents of the unit (inside our house) last week. We had a technician come in who told us multiple parts of the unit where completely burnt out.

Dr. HVAC does not want to simply replace the entire unit but rather is insisting on ordering replacement parts -a fix we understood would occur in a timely manner. One week later we still do not have a working AC; parts of our house are sweltering, and every time we call in we are told a manager will call us back yet we never receive a call back.

Currently our AC is in pieces, some of which are still sitting in our stairwell.

We also explained to them that two of the residents who live here are elderly and we need the AC fixed ASAP.

Not sure if the company is under new management but this experience has been greatly disappointing and frustrating.

Toronto’s Heating Systems

Most of the housing we work in downtown predates forced air. The semis and rowhouses in Riverdale, Leslieville and the Danforth were built for radiators and converted later, and the conversion is usually where the trouble starts. Ducts run through closets and boxed corners with almost no return air, so the furnace can be working perfectly while the second floor never warms up.

The other pattern we see constantly is a furnace sized for a leakier house. Windows and insulation got upgraded over the years, the furnace did not. Now it is oversized, so it fires, satisfies the thermostat in a few minutes, and shuts off again all night long.

And a lot of these houses run heat and hot water off one combi unit, which means when it fails you lose both at once. That is why our trucks carry boilers and not just furnace parts.

The calls we get most often:

No heat at all
Blowing cold air
Keeps shutting off, or short cycling
Will not ignite, or the pilot will not stay lit
Banging, scraping or screeching
Leaking water around the unit
Weak airflow, or the blower runs constantly
Some rooms cold while others are fine
Gas bill up with no change in use

We repair every make and model.

Furnaces we repair. Dr HVAC services Carrier, Lennox, Trane, American Standard, Bryant, Goodman, Amana, Rheem, York, Keeprite, Heil, Tempstar, Payne, Napoleon and Daikin furnaces, gas, propane and electric, across Toronto and the GTA.

Boilers and combi units we repair. We service Navien, Viessmann, Rinnai, IBC, NTI, Weil-McLain and Lochinvar.

As a Trane Comfort Specialist, we also handle Trane warranty work. See our furnace installation page for the brands we install.

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