The answer to 'why is my heat exchanger high energy bills' is that a faulty or inefficient heat exchanger can significantly increase your heating costs. The heat exchanger is a critical component of your HVAC system that transfers heat from the combustion process to the air circulating through your home. If the heat exchanger is cracked, leaking, or not functioning properly, it can reduce the system's efficiency and cause your energy bills to skyrocket.
Common symptoms of a problematic heat exchanger include increased energy usage, uneven heating, strange noises coming from the furnace, and even carbon monoxide leaks. These issues can be caused by normal wear and tear, improper installation, or even a manufacturing defect. In some cases, the heat exchanger may need to be repaired or replaced to restore your system's efficiency and lower your energy costs.