The 4+6 pin AC/gas adapter board controls the AC and gas operations from the main water heater control switch. 2 diagnostic LED's indicate this boards out functions: A green LED indicates when board is energizing the ignitor board for gas operation. A red LED indicates when board is energizing the AC relay for 120 volt AC operation.
Comes with: 2-tab mounting kit and the 4+6 pin AC/gas adapter board. Note: does not include a UIB S ignitor board needed for operation.