The Trane RLY03167 Relay Board (also known as D155079P01) is a time delay control board designed for HVAC systems. With a 24 Volt coil operating at 60Hz, this relay board ensures proper time-delay sequencing for critical components like compressors and fans, enhancing system performance and protection. Key Features Time delay functionality for component protection Operates on a 24 Volt AC coil at 60Hz Supports efficient and safe system cycling Ensures consistent HVAC performance Factory-engineered for Trane compatibility Specifications Part Numbers: RLY03167 / D155079P01 Function: Time Delay Relay Board Coil Voltage: 24 VAC Frequency: 60 Hz Application: HVAC unit control and protection Compatible Models 4A6H5042G1000CA 4TWR5061E1000CA 4TWX5018A1000AA 4A6C4048A3000AB 4TWA4048A3000AB 4A6H5048E1000AB 4A6B4042E1000AB 4TWR5024G1000CA 4TWB4061E1000BA 4TWR4060C1000AA Why Choose This Item The Trane RLY03167 Time Delay Relay Board provides a reliable and precise delay function that protects HVAC system components from premature cycling and ensures smooth operation. OEM-quality design guarantees a perfect fit and compatibility with numerous Trane models, making it an ideal replacement for efficient and long-lasting performance.