Bunn Coffee Machine CWTF 0/6 TWIN

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

Voltage across the black and white wires on 120 volt models or the black and red wires for 120/240 volt models, 200 volt models and 230 volt models checked

Voltage is present as described

If voltage is not present as described, check wiring harness

Black wire and the white or red wire disconnected from the tank heater terminals

Continuity across the tank heater terminals checked

Continuity is present as described

If continuity is not present as described, replace the tank heater

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 gently 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 start switch replacement

Remove wires from control thermostat leads

Remove the thermostat capillary bulb by firmly pulling-up on the capillary at the tank lid

Remove the one #8-32 screw securing the control thermostat to the component bracket in the trunk

Slide the grommet to the line 4.5\ above the bulb on the new capillary tube"

Insert the capillary bulb through the hole in the tank lid and press the grommet firmly and evenly so that the groove in the grommet fits into the tank lid

Carefully bend the capillary tube so that the tube and bulb inside the tank are in the vertical position

NOTE - The capillary tube must be clear of any electrical termination and not kinked

Early Models: Using two #8-32 screws secure the control thermostat inside the hood

Late Models. Using one #8-32 screw secure the control thermostat to the component bracket inside the trunk

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

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

Brewer disconnected from the power source

Blue and black wires disconnected from the limit thermostat

Continuity across the limit thermostat terminals checked with a ohmmeter

Sign off on the limit thermostat test