Furnace Repair in Ottawa
Furnace repair in Ottawa: fix it before deep cold becomes an emergency
A furnace that has stopped heating, is short-cycling, tripping the breaker or making new noises needs prompt attention, especially in an Ottawa winter when a small fault becomes a no-heat emergency and a frozen-pipe risk. Gas and electrical faults must be handled by a registered company. Here is what repair involves, when to repair versus replace, and how to judge an Ottawa company.
No heat in deep cold, or a suspected gas leak or carbon-monoxide alarm, is an emergency. If you smell gas or your CO alarm sounds, leave the home and call your gas utility's emergency line and emergency services first, before contacting a furnace company.
Ottawa Furnace Pros is an independent local guide. We are not a furnace installer and we do not install, replace, repair or service furnaces ourselves. We help Ottawa-area homeowners understand furnace installation, replacement, repair and maintenance, and connect with TSSA-registered, insured and vetted local companies for free, no-obligation quotes.
Common faults
- No heat. Often an ignition, flame-sensor, gas-valve or control-board fault; the gas side is certified-technician work.
- Short-cycling. The furnace turns on and off rapidly, often from a dirty filter, airflow problem or oversized unit, which wears it out faster.
- Tripping the breaker. An electrical fault that needs a licensed electrician, not a reset and hope.
- Noises or weak airflow. Blower, bearing or filter problems that get worse and less efficient over time.
- Cracked heat exchanger. A serious safety issue (carbon-monoxide risk) that usually means replacement, not a patch.
Repair or replace?
A newer furnace with a one-off fault is usually worth repairing. An old, inefficient unit (roughly 15 or more years) with a major failure, especially a cracked heat exchanger, is often safer and cheaper to replace with a high-efficiency model than to keep patching. A good company gives you the honest comparison rather than defaulting to the bigger sale.
How repairs are priced and how to compare
Repairs are usually a diagnostic call-out plus parts and labour; get the diagnosis and the quote in writing before authorising the work, and confirm current TSSA registration, gas-technician certification and insurance. Our furnace service page covers preventing faults, and our furnace installation page covers replacement when repair no longer makes sense.
Compare vetted furnace companies near you
Tell us a little about your home, whether you need a new furnace, a replacement, a repair or a service, and we will help you compare TSSA-registered, insured Ottawa-area companies and request free quotes. There is no obligation, and reputable companies assess the home before giving a firm price.
This page is general information, not professional advice. Every home and furnace is different, and only a qualified, TSSA-registered company can confirm the right system, capacity, scope and price after assessing your home. Always verify a company's current TSSA registration, gas-technician certification, insurance and WSIB coverage before signing a contract. Gas and electrical work is regulated for safety; using a licensed company is the safe and legal choice.
Frequently asked questions
There is no single price: it depends on the size and efficiency (AFUE) of the furnace, the layout and age of your home, whether ductwork or venting needs changing, and any electrical or gas-line work required. We do not quote a figure. A TSSA-registered local company gives you an exact price after assessing the home. As a rough guide, a new high-efficiency gas furnace installed typically runs several thousand dollars, more for larger homes or complex installs. Ask what is included (the furnace, installation, venting, permits, and removal of the old unit) so you can compare like for like. This page is general information, not a quote.
A newer furnace with a one-off fault is usually worth repairing. An older unit (roughly 15 or more years) that needs a major repair, runs inefficiently, or breaks down repeatedly is often cheaper to replace with a high-efficiency model than to keep patching, especially given Ottawa winters where a mid-winter failure is a safety issue. A good company gives you the honest comparison rather than defaulting to the bigger sale. Always get the diagnosis and options in writing.
Yes. In Ontario, gas appliance work must be done by a TSSA-registered contractor using a certified gas technician (G1 or G2), and the electrical connection by a licensed electrician (ESA). Using an unregistered installer can void the manufacturer warranty, breach the law, and create serious safety and insurance problems with a gas appliance. Always verify the company holds current TSSA registration and gas-technician certification, carries insurance, and has WSIB coverage, before work begins. Get the model, capacity and scope in writing.
AFUE (Annual Fuel Utilization Efficiency) is the percentage of fuel a furnace turns into usable heat. A high-efficiency condensing furnace is typically 95% AFUE or higher, versus older units around 60-80%. A higher AFUE generally means lower gas bills for the same heat, but the real saving depends on your home insulation, how cold the winter is, and your gas rate. A good installer sizes the furnace correctly for your home, since an oversized or undersized unit wastes money and comfort either way.
Most furnaces benefit from a service once a year, ideally in autumn before the heating season, to clean or replace the filter, check the burners, heat exchanger and venting, and confirm safe, efficient operation. Annual maintenance keeps gas bills down, extends the life of the unit, protects the warranty (many require it), and catches faults like a cracked heat exchanger before they become a safety risk. A company can set up a simple maintenance schedule for your furnace.
No. Ottawa Furnace Pros is an independent local guide. We do not install, replace, repair or service furnaces ourselves and we do not employ technicians. We help Ottawa-area homeowners understand their options and connect with TSSA-registered, insured and vetted local companies for free, no-obligation quotes.
