The answer to 'why is my furnace high energy bills' is that there are several common causes, including an old or inefficient furnace, issues with insulation or air leaks in the home, and problems with the furnace's components or settings. Symptoms may include the furnace running constantly, uneven heating, or unusually high utility bills.
To troubleshoot, start by checking the furnace's air filters and replacing them if they are dirty. You can also inspect the ductwork for any leaks or blockages. If the problem persists, it's best to call a professional HVAC technician to diagnose and repair the issue. They can assess the furnace's efficiency, identify any malfunctioning parts, and recommend solutions to improve its performance and reduce energy costs.