On a cold, snowy winter's day, the last thing you want to worry about is a nonfunctional furnace. Unfortunately, failure to spot the signs of trouble can land you in hot water. Here are three things you can do to avoid the need for heating repair so you don't have to worry about trouble with your furnace when you aren't expecting it. 1. Give Your Furnace A Break Although most people take the components of their home for granted, you should never assume that the systems of your home can operate at full capacity constantly.