Most furnaces don’t fail without warning.
They usually give signs first, long before the heat goes out.

In this episode of Air Design Answers, Todd and Chris break down what’s really happening inside furnaces in homes across London, Strathroy, and Southwestern Ontario before they stop working. If you’ve ever said, “It was fine and then it just quit,” this conversation is for you.

We talk about:

• Why furnace failures almost never come out of nowhere

• The quiet warning signs homeowners often overlook

• What longer run times, new noises, and uneven heating actually mean

• How airflow, venting, and system design affect furnace lifespan

• Common mistakes that turn small issues into cold-weather emergencies

• What homeowners can do now to stay ahead of problems without panic or pressure

This isn’t sales advice or scare tactics. It’s a real, straightforward conversation based on what we see every day inside homes during Ontario winters. The goal is simple: help you understand your system better, avoid unnecessary surprises, and make calmer, more informed decisions before you’re dealing with no heat.

If you live in a cold climate and rely on your furnace to get through the winter, this episode will help you recognize the early signs that something’s changing and what to do about it before it becomes an emergency.

When temperatures plunge, furnaces don’t usually fail at random , they fail under stress.

In this first episode of Air Design Answers Podcast, we break down why heating systems tend to stop working during extreme cold snaps, even when they seemed “fine” just days before.

You’ll learn how cold weather pushes furnaces to run longer, harder, and closer to their limits, exposing hidden issues like airflow restrictions, aging components, poor maintenance, and design shortcuts that don’t show up during mild weather. We’ll explain why certain breakdowns are far more common during cold snaps, what warning signs homeowners often miss, and which problems can’t be fixed with a quick service call once temperatures drop.

We also share insight from residential heating systems, where extreme demand planning is critical, to explain what residential systems can (and can’t) realistically handle when the weather turns brutal.

If you’ve ever wondered why furnaces seem to fail at the worst possible time, or how to reduce the chances of being left without heat during the coldest days of the year, this episode gives you the real-world answers most people never hear.