The inducer (draft) motor clears combustion gases before the burners fire. When it fails, the furnace will not ignite because the pressure switch never closes. Here is what to know and when to call a licensed technician.
Likely causes
In rough order of how often we see them:
- A seized or failing inducer motor.
- A worn inducer bearing causing humming or rattling.
- A blocked vent or condensate trap holding the pressure switch open.
- A cracked or disconnected pressure-switch hose.
- A control board not powering the inducer.
- Debris in the inducer housing.
Safe checks you can do first
Before booking a visit, rule out the simple things: confirm the thermostat is on and set to heat (fresh batteries help), check that the breaker and the furnace power switch are on, and inspect the air filter — a clogged filter is behind a surprising share of breakdowns. On a high-efficiency unit, a quick look at the condensate drain can save a call. Reset the system once if it has locked out.
When to call a licensed technician
Call a pro for anything involving combustion, venting, or internal electrical parts. If you ever smell gas, leave and call your gas utility or 911 from outside first. Inducer and pressure-switch faults sit in the combustion path — leave them to a licensed technician.
What a repair visit actually involves
When a technician arrives, the first job is a real diagnosis — measuring, testing components, and reading any fault history rather than swapping parts and hoping. Once the actual cause is clear, you get an itemised quote before anything is replaced. Most common faults are a same-visit fix; the honest exception is a unit so old or worn that a repair is throwing good money after bad — and we will say so plainly rather than keep selling you parts.
Stopping it from happening again
Most repeat faults trace back to one of two things: a root cause that got patched instead of fixed, or maintenance that quietly fell behind. Once your furnace is running again, an on-schedule filter and one professional tune-up a year are the cheapest insurance against the same call next season. Our maintenance plans make the annual part automatic, and this guide explains how often different systems really need attention.
What to expect when you book
The process is simple and transparent. We start with a few questions to understand what you are seeing and find a visit time that suits you. On site, a licensed technician diagnoses the real cause rather than guessing, then explains it in plain language. You get a clear, itemised quote before any work starts, and we only proceed once you say yes. No surprise line items, and no pressure to add things you do not need.
Talk to a licensed local HVAC team in Greater Vancouver.
Straight answers, fair pricing, and no pressure to buy what you don’t need.
Why homeowners call HeatLand
HeatLand is a local heating and cooling company based in Burnaby, serving Greater Vancouver and the wider Lower Mainland. We diagnose before we quote, we explain what we find in plain language, and we will tell you honestly when a repair makes more sense than a replacement — or the other way around. There is no commission-driven upsell here.
Frequently asked questions
Why won’t my furnace start if the inducer fails?
The furnace runs the inducer first to prove the vent is clear. If the inducer does not spin up and close the pressure switch, the control will not light the burners — it is a safety interlock.
What does a failing inducer sound like?
Often a humming, rattling, or grinding from the top of the furnace when it tries to start, followed by a lockout. A technician can confirm the diagnosis quickly.
Can you repair it the same day?
Inducer assemblies and pressure switches are common parts. Call (604) 330-3812 — many are a same-visit fix.
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