So the furnace finally came back from vacation, but almost as soon as it got back it started feeling sick. It gave out a few rumbles and whirrs and then lay down and took a nap. My person had to call the furnace doctor. Now, I’m happy to report, the furnace is a feeling a lot better. I wonder how it spent its vacation. It must have been partying hard the whole time, or something, to come back feeling so sick. But it’s not telling. It just hums and whirrs and says it’s too busy heating the house to have time to tell me about it.