This control circuit board is specially designed for Carrier brand air conditioning units. It has been tested and confirmed to be in good working condition. The OPN-RTUM2 012311 Rev 14 A RTU PCB is a crucial part of the HVAC system, ensuring smooth and efficient operation. The board is suitable for use in heat controller systems and is categorized under HVAC & Refrigeration: Parts & Accessories and HVAC & Refrigeration: Controls & Circuit Boards. Whether you are replacing a faulty board or upgrading your system, this Carrier control circuit board will meet your needs.