The answer to 'heat exchanger high energy bills' is that a problem with the heat exchanger can be a common cause of high energy bills for your HVAC system. The heat exchanger is a critical component that transfers heat from the combustion process to the air that circulates through your home. If the heat exchanger is cracked, damaged, or not functioning properly, it can reduce the efficiency of your system and cause it to work harder, using more energy to heat your home.
Some common symptoms of a heat exchanger issue include higher than normal energy bills, uneven heating, strange noises coming from the furnace, and the furnace shutting off unexpectedly. If you suspect a problem with your heat exchanger, it's important to have a professional HVAC technician inspect it as soon as possible. Attempting to repair or replace the heat exchanger yourself is not recommended, as it can be dangerous if not done properly.