Tools:
• Phillips Head Screwdriver
-or-
• #2 Phillips Drill
• Needle Nose Pliers
• Replacement WatchDog Control Board
1. First, you will need to remove the cabinet** so you can access the control board. The control
board will be located on the duct side of the machine.
2. At this point, you will need to unplug the following wires on the control board:
(starting in the upper left corner and moving clockwise around the board)
• Power (White)
• Compressor (Black)
• Fan (Blue &Brown)
• Hot Gas Bypass Valve (Black)
• Coil Sensor (White)
• RH Sensor (Red)
• Display (White)
• Data Port (Black &Red)
• Dry Contacts/Terminal Strip (White & Blue)
• Power Cord (Black)
• Compressor (Red & Blue)
Control
Board
WatchDog 550 Guide:
How to Change the Control Board
Seaira Global • 14021 NC Highway 50 • Surf City, NC 28445
