Growing up, my parents taught me a lot about life. They wanted to make sure that I was prepared for the world, and I am really grateful for that because I have seen most people my age and even older who are clueless on so many things. Because of them, I was able to buy my first house when I was just 26 years old. Also because of them, I knew to contact a Sacramento HVAC company a few years later when I did my fall furnace check and heard some strange noises I had never heard before.
They had taught me to always check my air conditioners in the spring and my furnace in the fall, well before I would need to use either one. That way, if something was wrong with one, then I would have sufficient time to have it fixed. I wish I could say that I was able to fix it on my own, but I know my own limitations. I did check a few things, but I could not figure out why it was making the noise that it was making. Instead of messing with it further, I just called in a professional to hopefully fix it before I needed to use it in another month or so.
The furnace has an additional fan that has metal blades to force exhaust gases in the direction they need to go. If that fan goes out, the furnace shuts off to prevent carbon monoxide from getting into the house. The metal blades of the fan turned out to be hitting the metal framework of the furnace. A couple of loose screws caused the motor assembly to shift just slightly out of place. The fan and motor were okay, it just needed repositioned and retightened. It only took a few minutes to fix, but the service call was worth it to have a furnace that would not fail this winter.