When I woke up this morning, our house was freezing cold. Thankfully, it wasn’t a major problem, and my dad was able to get the furnace working in just a few minutes. My dad had known that the furnace might stop working. Apparently, the thermostat that we had connected to our heating system was going bad, and the heating system wouldn’t come on until the thermostat was replaced. Of course, we didn’t know what caused the heating system to go bad at first. When we went to bed the night before, the heating system was working normally. However, when I woke in the middle of the night to go to the bathroom, I noticed that the hallway was freezing cold. I had a space heater in my room, so my room didn’t feel cold. Usually, my parents adjust the thermostat to make the rest of the house chilly at night to save money, so I figured that that was the reason that it was cold in our house. However, when my dad got up in the morning, he immediately knew that the heating system wasn’t working, and he spent a few hours in the basement trying to figure out why the heating system was broken. He finally came upstairs without an answer but figured that he would check the thermostat. When he did, he realized that it wasn’t working. He had already bought another thermostat and quickly replaced it. As soon as the new thermostat was connected, the heating system came back on! I think that it is so cool that my dad knew how to replace the thermostat on our heating system.