Furnace repair in London, Ontario
Fast furnace repair when you need it most
Donaldson Home Services repairs natural gas, propane and electric furnaces for homes in London and surrounding communities. Our TSSA-licensed gas fitters find the cause first and give you upfront pricing before any repair begins, with same-day and 24/7 emergency service available.
Signs you need a furnace repair
Not every furnace problem means your system needs to be replaced. In many cases, a professional repair can restore reliable heat and keep your existing furnace running properly.
It may be time to schedule furnace repair if you notice:
If your furnace isn’t heating your home the way it should, our technicians can diagnose the problem and explain what needs to be done before any repair begins.
Reach out today!
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Same-day emergency furnace repair
No heat? We offer 24/7 emergency service. Call us now and we’ll work to get a technician to your home the same day, subject to availability.
Find the problem. Fix it right.
When your furnace isn’t working properly, the first step is figuring out why. Our technicians take the time to diagnose the problem, explain what they find and recommend the repair that makes sense for your system, without pushing work or equipment you don’t need. We also handle furnace maintenance, new furnace installation and heat pumps for homes in London and surrounding communities.
What to expect
Furnace problems are stressful. Our process is designed to find the issue, explain your options clearly, and get your heat back on as quickly as possible.
Step one
Schedule Service
Call, text, book online, or fill out the form to tell us what’s happening with your furnace. We’ll arrange a service visit at a time that works for you, with same-day emergency service available when you need help fast.
Step two
Diagnose problem
A licensed technician will inspect your furnace, troubleshoot the issue, and identify what’s causing the problem. We take the time to diagnose the source, not just treat the symptom.
Step three
Explain options
Once we know what’s wrong, we’ll explain the recommended repair and pricing before work begins. If there’s more than one solution, we’ll walk you through your options so you can make an informed decision without pressure.
Step four
Repair & test
With your approval, we’ll complete the repair, test your furnace to make sure it’s operating properly, and leave the work area clean. Qualifying repairs are also backed by Donaldson’s repair guarantees for added peace of mind.
We repair all furnace makes and models
We service all makes and models, including systems we didn’t install. That includes natural gas, propane, electric and forced-air furnaces.
Furnace repairs backed by our 90-day guarantee
Donaldson stands behind our repair work. If we’ve been in your home within 90 days and you’re still experiencing the same problem, we’ll come back and take another look with no additional trip charge. And when you proceed with your technician’s professional repair recommendation, that repair may be backed by our Lifetime Repair Guarantee for added peace of mind.
Why homeowners choose Donaldson
Honest advice, expert craftsmanship and a commitment to treating every home like our own, backed by 4.9 stars from 3,000+ Google reviews.
Local and family-owned
We’re not a franchise. Donaldson has been owned and run by Jamie and Anna Donaldson since 2013, and our reputation matters to us personally.
Honest recommendations
We explain every option in plain language and help you choose what’s right for your home and your budget, never simply what’s most expensive.
Upfront pricing
We give you the full price before any work begins, and what you’re quoted is what you pay. No hidden fees or unexpected invoice charges.
True Care protection
True Care brings parts and labour, diagnostics, annual maintenance and priority service together on qualifying new furnaces and air conditioners.
What your neighbours are saying about us
When to repair or replace your furnace
Not every furnace problem means you need a new system. In many cases, a professional repair can restore reliable performance and extend the life of your furnace. But as your system gets older (or repairs become more frequent or expensive), replacement may become the better long-term investment.
Consider the age of your furnace
Age is an important factor, but it shouldn’t be the only one. An older furnace that has been reliable and well maintained may still be worth repairing, while a system experiencing repeated problems may be approaching the end of its useful life.
Compare the repair cost
A minor repair usually makes sense when the rest of the furnace is in good condition. A common rule of thumb: multiply the furnace’s age by the cost of the repair. If the result is 50% or more of the price of a new furnace, replacement is usually the better investment, and we’ll help you compare the two.
Think beyond the immediate repair
Frequent breakdowns, rising energy use, inconsistent temperatures and declining performance can make an older furnace more expensive to keep running. We’ll assess the condition of your system and give you straightforward options, not push you toward a replacement you don’t need. If a new furnace does make sense, your in-home estimate is free.
Membership Plans for every home
Choose how many pieces of equipment you want Donaldson to maintain year-round with our simple 10, 20 & 30 plans. A little care now means fewer surprises later.
Best value
Whole-Home Care
Furnace, AC, water heater, humidifier, HRV & fireplaces
$30
/Month
Furnace + AC Care
Both units covered, 2 maintenance visits per year
$20
/Month
Furnace or AC Care
Coverage & 1 maintenance visit per year for one unit
$10
/Month
Waived Diagnostic Fee
15% repair discount
Priority booking
Serving London, Ontario and surrounding areas
Locally based, with technicians across Southwestern Ontario. Don’t see your town? Give us a shout. Chances are we’re nearby.
Schedule a 2-hour arrival window for any home heating, air conditioning, or plumbing service. You’ll receive a text when we’re on the way, plus a photo of your technician so you know exactly who’s coming. Book now and experience service you can trust.
Furnace repair FAQs
Have more questions? We’ve got the answers.
Common warning signs include unusual noises, weak or uneven heating, frequent cycling, rising energy bills, or a furnace that won’t turn on or hold the set temperature. Before you call, check that the thermostat is set to heat, the furnace power switch is turned on, the breaker hasn’t tripped and the filter isn’t clogged. If it still isn’t heating, book a furnace repair.
Yes. We offer 24/7 emergency service. Call us now and we’ll work to get a technician to your home the same day, subject to availability. If your furnace stops working or you’re left without heat, don’t wait. Once your heat is back on, regular furnace maintenance helps prevent future breakdowns.
Furnace repair costs depend on what’s causing the problem and which parts or labour are required. A technician will diagnose the issue, explain the recommended repair, and review the cost with you before proceeding.
It depends on the age and condition of your furnace, the type and cost of the repair, and whether the system has had recurring problems. Donaldson can assess your furnace and explain both options, without pushing a replacement you don’t need. If replacement makes more sense, your in-home estimate for a new furnace is free.
Yes. We service all makes and models, including systems we didn’t install. That covers natural gas, propane, electric and forced-air furnaces. If you’re unsure about your equipment, send us the make and model and we’ll let you know what to expect. Keep an older furnace running well with regular furnace maintenance.
Donaldson backs its repair work with added protection. If you experience the same problem within 90 days, we’ll return to look at it again with no additional trip charge. Repairs completed according to the technician’s professional recommendation may also qualify for Donaldson’s Lifetime Repair Guarantee.
Helpful resources
Everything you need to make confident decisions about your home.
Need some assistance?
Let’s get started
Reliable home service from a trusted local team: honest advice, upfront pricing, and True Care coverage that keeps us in your corner long after the job is done.
Call (519) 439-4328 or schedule your service online.
