Don't panic! Learn what might be causing this troubling issue, what you can do about it and when to call in a pro.

Lexie is a former Staff Writer at Forbes Home and has over 6 years of professional experience as a writer and editor in the home improvement space. She's previously worked at sites such as HomeAdvisor ...

"American Rooter & Drain"A faulty furnace is more than an inconvenience-it can compromise comfort, damage property, and in extreme cases, threaten health. A Reliable Partner When the Heat Goes Out ...