Replacing your furnace filter is one of the simplest and most important  things you can do to keep your home comfortable and your HVAC system running smoothly. But most homeowners either forget to do it—or don’t realize how much it truly affects their furnace, air quality, and monthly energy bills. So… how often should  you be replacing your filter? Let’s break it down clearly, along with the benefits of changing it regularly  and the problems that happen when you don’t. ❄️ H

A furnace rarely quits without giving you warning signs first. The problem? Most homeowners don’t recognize the signs  until the system completely fails—usually during the first deep freeze of the year. Knowing the early indicators can save you from a cold house, an emergency repair bill, and the stress of a surprise breakdown. Here are the top 10 signs your furnace is on its last legs , and what you should do next. 1. Your Furnace Is 12–20 Years Old Most furnaces last 12–20