My furnace had been making some really loud noises.
Everything you read online says that noises are bad. I totally freaked out and expected my furnace to be basically dying. I did all the things that I knew how to do. I changed the furnace filter, oiled the blower and cleaned the inside of the furnace device. When that did not stop the noise, I called a HVAC business. I was so worried that I even paid for after hour emergency heating service. It is the middle of winter, the last thing I wanted was the heater just stopping or refusing to turn on. I needed my heating to be in tip top shape. I paid so much money to get the HVAC contractor in right away. The appointment took the guy 30 minutes. The reason it was so fast is that it was not a big deal. Apparently noises can be worn, loose or busted parts in the heater rattling around. Most of the time though, it is something that is loose that is easily tightened. The HVAC professional tightened all the bolts on the furnace. He then checked to make sure the squirrel cage, yes that is the real name, was fastened secure enough. The guy then figured out there was a gap from my ductwork to my furnace. He simply patched the gap with what looked like tape. It took him literally five seconds and then the furnace made no more noise. That was it and what I got for my emergency service appointment. Next time I hear a noise I will calm down.