Bunn Brewer TWF

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

Disconnect the white/red and white/green wires from the hot coffee solenoid valve

Press the START switch with the TEA/ OFF/COFFEE switch in the COFFEE position

Voltage across the white/red and white/green wires

Check brewer wiring harness if voltage is not as described

Check for continuity across the hot coffee solenoid valve coil terminals

Reconnect the white/red and white/green wires from the hot coffee brew timer if continuity is present

Replace the solenoid valve if continuity is not present

Warning: Connect the brewer to the power source before checking the hot coffee solenoid valve for coil action

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

Disconnect the white/violet and white/blue wires from the iced tea brew solenoid valve

Press the START switch with the TEA/OFF/COFFEE switch in the 'TEA' position

Voltage across the white/violet and white/blue wires

If voltage is present as described, proceed to next step. If not, check brewer wiring harness

Check for continuity across the iced tea brew solenoid valve coil terminals

If continuity is present, reconnect the wires. If not, replace the solenoid valve

Check the iced tea solenoid valve for coil action

If a 'clicking' sound is heard and water will not pass through the valve, there may be a blockage or the valve may require inspection. If the sound is not heard, replace the solenoid valve

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

Brewer disconnected from the power source

Thermal fuse disconnected from the right tank heater terminal

Black lead disconnected from the control thermostat

Continuity checked across the thermal fuse terminals with an ohmmeter

Is continuity present across the thermal fuse terminals?

If continuity is not present, replace the thermal fuse

Sign off on the Brewer Thermal Fuse Test

Both wires removed from the limit thermostat terminals

Limit thermostat carefully slid out from under the retaining clip

New limit thermostat carefully slid into the retaining clip

Sign off on the Brewer Limit Thermostat Replacement

Disconnect the brewer from the power source and remove the black wire from the limit thermostat

Check the voltage across the black wire removed from the limit thermostat and the white or red wire on the tank heater terminal

Disconnect the brewer from the power source

If voltage is present as described, reconnect the black wire and proceed to #4. If voltage is not present as described, check the wiring harness

Remove the blue wire from the limit thermostat

Check the voltage across the exposed terminal of the limit thermostat and the white wire from the power cord or the red wire from the terminal block

Disconnect the brewer from the power source