If you think your furnace is dying, there are a few things you can do to check: 1. Check the filters - dirty filters will reduce airflow and make the furnace work harder, which can lead to failure. 2. Listen for strange noises - a failing furnace will often make loud, unusual noises. 3. Check the temperature - if the temperature in your house is significantly different than it usually is, your furnace may be having trouble keeping up. 4. Look for signs of corrosion or water damage - these can be signs that the furnace is about to fail. If you think your furnace may be breaking, it's best to call a professional to come take a look and give you a diagnosis.

There are a few tell-tale signs that your furnace might be breaking. One of the most obvious is if the furnace is making strange noises, such as rattling or banging. Another common sign is if the furnace is not producing heat, even when it's turned up to the highest setting. Finally, you might also notice an increase in your energy bills, as this could be a sign that your furnace is working harder than usual to generate heat. If you're noticing any of these signs, it's best to call in a professional to take a look at your furnace and determine whether it needs repairing or replacement.