A well-maintained furnace has a life expectancy of more than 10 years. Routine maintenance of your system is the key to keeping it working. Monthly and yearly cleaning chores, which involve changing your heating and cooling system’s filter and completely dusting off your unit’s internal components, are a must. Unfortunately, even if you have diligently cared for your furnace, it will eventually give out. Telltale signs that your heater in Portland is on the fritz are escalating energy bills, wildly fluctuating indoor temperatures, and strange noises when your central heating unit is running. Check out this video to learn more about the right time to upgrade the furnace in your home.