You probably know how this goes. You get up in the morning and at first everything seems okay, and then you realize everything isn’t okay. It started with the central air conditioning. It had been running all night, non-stop, and yet the house didn’t feel particularly cool. It refused to turn off when I lowered the temperature. Long story, short, an expert had to be called in to get it working again. Naturally this happens as the weather is heating up again.