One of the most divisive topics in our industry is red-tagging a gas furnace. There are usually two types of calls where you could find yourself in this situation. The first is during a routine ...

Gayle Zook of Blaine had a 19-year-old furnace until Monday, when it was replaced after being red-tagged on Friday. Red-tagging, the practice of a heating and air conditioner technician shutting off a ...