Bus Circuit Boards
Air Conditioning Control Board - 04278701B

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ACC Unit Single Blower 3 Speed Control Board
Replaces 13-11593 Control Board

The new Five-Relay board has a separate relay for the compressor clutch and the condenser fans. To replace a four-relay board with a Five-Relay board, the two wires (normally grey for the compressor clutch and orange for the Condenser Fans) must be split apart and each inserted into its respective connector on the replacement board. All other connections remain the same.


Air Conditioning Control Board - 13-11593

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ACC Unit Dual Blower 3 Speed Control Board

The Four-Relay board had a single relay for the compressor clutch and the condenser fan. The clutch wire and the fan power wire (if both are present) Will be spliced together at or near the relay board. Newer WAGO-equipped Four-Relay board may have the two wires inserted into the connector, while the older boards with a wire lead may have them inserted together into the butt-connector or spliced into the wire further down.