What is a furnace draft inducer motor?

A furnace draft inducer motor is a small electric motor with a fan that creates negative pressure to safely vent combustion gases out of your furnace through the flue pipe. This motor starts up before your furnace ignites, pulling air through the heat exchanger and ensuring proper ventilation of dangerous gases like carbon monoxide.

The draft inducer motor is a critical safety component that's required on all modern gas furnaces in Ontario. When your thermostat calls for heat, the draft inducer starts first to establish proper airflow. Only after the motor creates adequate draft does the furnace's control board allow the gas valve to open and ignition to occur. This sequence prevents dangerous gas buildup and ensures combustion gases are properly vented outside your home.

Common signs of a failing draft inducer motor include unusual noises (grinding, squealing, or rattling), the furnace starting then shutting down after a few seconds, or error codes on your thermostat. In Ottawa's climate, these motors typically last 10-15 years but can fail sooner due to constant use during our long heating season. The motor housing can also crack from age, causing air leaks that affect proper venting.

If your draft inducer motor fails, your furnace will not operate - this is an important safety feature. Never attempt to bypass or repair this component yourself, as improper installation can lead to carbon monoxide poisoning. TSSA regulations require that only licensed G2 or G3 technicians work on gas furnace components. Draft inducer motor replacement typically costs $400-700 in the Ottawa market, including parts and labor.

If you're hearing unusual noises from your furnace or experiencing intermittent heating issues, it's worth having the draft inducer motor inspected during your annual maintenance. For professional diagnosis and repair of furnace components, Ottawa HVAC Pro's licensed technicians can safely assess and replace draft inducer motors to keep your home heating safely.