Does Your Furnace Need Repairs? Watch For These 8 Signs

In many homes, the furnace is the single or major heating source. Like most people, you rely on your furnace to keep your family warm throughout the winter months, no matter how cold it gets or how strong the wind blows.

A broken furnace may be inconvenient and uncomfortable and cause property damage or harmful living conditions. Because furnace failure poses such serious hazards, it is critical that you, as a homeowner, understand how to recognize the indicators that your furnace needs repairs.

Prompt and expert furnace repairs might help you avoid bigger problems later in the season. In this blog, we list eight common warning signs that your furnace needs assessment and likely repairs from an HVAC technician.

1. Abnormal Furnace Smells

If your furnace is emitting strange smells, it’s time to call in a professional. Burning smells usually indicate an electrical problem, while musty smells could be a sign of a gas leak. Either way, it’s important to have a technician take a look as soon as possible.

2. Changes in Airflow

If you’ve noticed a decrease in the airflow from your furnace, it could be a sign that the blower motor is going out. A professional can take a look and determine whether the motor needs to be replaced or if there’s another issue causing the decreased airflow.

3. Short Cycling

Short cycling is when your furnace turns on and off more frequently than usual. This can be caused by several issues, including a clogged furnace filter or a problem with the thermostat. A technician can help you troubleshoot the issue and get your furnace back to running smoothly.

4. Energy Bills Increasing

If your energy bills have been increasing, but you haven’t made any changes to your heating usage, it could be a sign that your furnace is no longer operating as efficiently as it once was. This is often due to wear and tear on the furnace over time. A professional can take a look and let you know if it’s time for a replacement.

5. Unexplained Noise

If your furnace is making strange noises, it’s definitely time to call in a professional. These noises could be caused by a number of different issues, and a technician will be able to diagnose the problem and make the necessary repairs.

6. No Heat

If your furnace is not providing enough heat or any heat at all, it may be in need of a service. One of the most common issues that can cause this problem is a clogged air filter. A professional will be able to check for this and other potential issues to get your furnace up and running again.

7. Discolored Pilot Light

If you notice that your furnace’s pilot light is discoloured, it could be a sign that the furnace is not burning fuel correctly. This could be caused by several issues, such as a dirty burner or a problem with the gas line. A professional will be able to diagnose the problem and make the necessary repairs.

8. Tripped Carbon-Monoxide Detector

If your carbon-monoxide detector goes off, it could be a sign that there is a dangerous level of gas present in your home. This could be caused by a problem with your furnace. A professional will be able to check for any leaks and make the necessary repairs to keep your family safe.


If you’re having problems with your furnace, it’s crucial that you get it fixed as soon as possible. There are a lot of things that can go wrong with a furnace, and they can all be pretty dangerous.

If you don’t know what you’re doing, you could end up causing a lot of damage. In some cases, you might even end up injuring yourself or worse.

It’s always best to call Legacy Heating and Cooling when you’re having furnace problems. They’ll be able to diagnose the problem and make the necessary repairs.

If you are looking for HVAC repair and furnace maintenance in Calgary and Edmonton, Legacy Heating is here to help. We provide HVAC services for residential and commercial properties, including installation, repair, maintenance, and replacement of furnaces, air conditioners, humidifiers, unit heaters, thermostats, and air cleaners. Message us today for a free quote!

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