The Honeywell TF 830.3 Oil Burner Control Unit (02231) is a reliable and efficient control unit designed for heating systems. Manufactured by the trusted brand Honeywell, this control unit ensures precise and accurate control of your heating system, providing you with a comfortable and consistent indoor environment. Whether you are looking to replace a faulty control unit or upgrade your existing system, the Honeywell TF 830.3 Oil Burner Control Unit is a high-quality and durable option for your heating needs. I had this unit as a spare, but have recently changed.my whole boiler so now no longer needed