REPAIR PROCEDURES (CONTD)
Master Control Box Assembly.
Test the components in the master control
box and repair the unit by replacing the defective component. The
flame safeguard control and buzzer repair was described in paragraph
High voltages that are dangerous to human life may be
present. Before working on electrical circuits,
remove all power from the water heater.
1. Turn off power switch (1) and disconnect power cable (2).