Bunn Coffee Machine 23001.0023

Warning: Ensure the coffee machine is unplugged before starting the procedure

Blue wire and white/red wire removed from the start switch

Clips inside the hood compressed and start switch pushed through the opening

New switch pushed into the opening and clips spread to hold the start switch in the hood

Wires reconnected to the new switch

Sign off on the switch replacement

Warning: Disconnect the brewer from the power source before starting the test

White or red wire removed from the upper terminal and black wire from the center terminal

Voltage across the white or red wire and the black wire

If voltage is not as described, refer to the Wiring Diagrams and check the brewer wiring harness

Black wire removed from the center terminal and wire removed from the lower terminal

Continuity present across the center and lower terminal with the switch in the 'ON' position

Continuity not present when the switch is in the 'OFF' position

Remove the #8-32 screw securing circuit board to the mounting bracket

Remove circuit board and spacers (as required)

Remove all wires from the timer

Attach all wires to the replacement timer board prior to installation to the component mounting bracket. Refer to FIG. 21 when reconnecting the wires

Install new circuit board with spacers (as required) to the component mounting bracket

Adjust the timer as described below

Sign off on the timer replacement

Remove the white/blue and white/green from the solenoid valve

Turn-off the water supply to the brewer

Disconnect the water lines to and from the solenoid valve

Remove the two #8-32 screws securing the solenoid mounting bracket to the component bracket. Remove solenoid bracket and solenoid valve as an assembly

Remove the two #10-32 screws and lockwashers securing the solenoid valve to the solenoid bracket

Using two #10-32 screws and lockwashers install new solenoid valve on solenoid mounting bracket

Using two #8-32 screws install solenoid valve and bracket to the component bracket

Securely fasten the water lines to and from the solenoid valve

Disconnect the brewer from the power source

Disconnect the black wire from the limit thermostat

Check the voltage between the black wire removed from the limit thermostat and the white wire or red wire on the tank heater with a voltmeter

Disconnect the brewer from the power source

Check for continuity between the black wire removed from the limit thermostat and the black insert on the terminal block

Is continuity present in the 'ON' upper position?

Is continuity not present in the 'OFF' lower position?