Bunn Coffee Machine CW15

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

Remove the three #4-40 screws securing the warmer assembly to the brewer

Lift the warmer assembly from the brewer

Disconnect the two wires from the warmer element terminals

Remove the two #8-32 nuts securing the warmer element to the warmer plate

Securely install new warmer element

Reconnect the two wires to warmer element terminals

Securely install warmer assembly on the brewer

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

Wires removed from the switch terminals

Clips inside the hood compressed and switch pushed through the opening

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

Wires reconnected to the new switch

Sign off on the 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

Select the model of the coffee machine

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

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

All wires removed from limit thermostat terminals

Limit thermostat slid out from under the retaining clip and removed

New limit thermostat slid into the retaining clip

Wires reconnected to the new limit thermostat

Sign off on the thermostat replacement

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

Disconnect the white/blue and white/green wires from the solenoid valve

Press the start switch with the ON/OFF switch in the ON upper position

Voltage across the white/blue and white/green wires

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

Check for continuity across the solenoid valve coil terminals

If continuity is not present as described, replace the Solenoid Valve

Check the solenoid valve for coil action

Listen carefully in the vicinity of the solenoid valve for a clicking sound