Heat exchangers are one of the most important components of a gas-fired or oil-fired furnace. When you flip on the switch to turn on your furnace it will start to burn fuel that heats up the heat exchanger. If your heat exchanger gets cracked it can cause serious problems for your home—including carbon monoxide poisoning. Because the heat exchanger is inside of your furnace and because it isn’t a moving part it can be difficult to detect when it needs repair. For all your Ajax, ON heating repair call the friendly experts at Advantage Airtech. For over 25 years we’ve been providing complete furnace repair services to our customers. We thought it would be helpful to put together a list of the common signs for a cracked heat exchanger.

What Does A Heat Exchanger Do?

The heat exchanger in your furnace is a large piece of metal that gets heated up by the burner flames. Your furnace’s fan pushes cool air over the heat exchanger which heats it up. The ductwork in your home then carries the heated air into each of your rooms.

But heat exchangers have a second, equally important task: they exhaust the combustion fumes that result from burning fuel. One of those gases is carbon monoxide—the tasteless, odorless and colorless deadly gas. If your heat exchanger develops a crack it can allow those gases to escape into your home’s air supply.

How Do Heat Exchanger’s Crack?

Heat exchangers can crack because of a number of common causes.

  • Rust – If your air conditioning system is located above your furnace then condensation from your AC can drip down onto the heat exchanger and cause it to rust.
  • Overheating – This happens a lot in homes whose furnace is too big or when the air filter isn’t changed enough.

Signs You Have A Cracked Heat Exchanger

There are a couple ways that you can detect if your heat exchanger is cracked.

  • Wiggling or yellow flames – You should check your furnace’s burner on a regular basis. If you notice that the flames are wiggling or if they are yellow it could mean that the heat exchanger is leaking. The flames should normally burn steady and blue.
  • Rattling – If your furnace is making a rattling noise it can sometimes indicate that the heat exchanger is cracked.

If you have any suspicions about your heat exchanger call the Ajax, ON heating repair experts at Advantage Airtech. We have years of experience dealing with all kinds of furnace problems and cracked heat exchangers. Unfortunately, it most cases, a cracked heat exchanger means that you need to replace your entire furnace. Give us a call today and we’ll send someone to your house to check it out.

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