Carrier Bryant HK42FZ007 Furnace Control Circuit Board 1012-940. Removed by HVAC installer from a fully functioning system. Old system was replaced with newer one (more energy efficient) and was in good working condition. This part was inspected by professional HVAC installer. This part is used, but in very. Please see more details from the images attached. Please check images carefully because you will receive the same item as pictured, or a very similar one. Purchasing used parts you agree with the statement that sometimes hidden defects or malfunctions may occur during installation or continuous use. Most of the parts require specific knowledge and skills to be installed properly. If you don’t have skills or knowledge, you must ask certified HVAC technician to install.