Bunn Coffee Machine CWTF-35 1L, 2U

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

If voltage is not present as described, check wiring harness

Continuity across the tank heater terminals checked

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

Tank heater remains unable to heat?

If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath

Sign off on the tank heater test

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

Remove the pink and tan wires from the switch

Compress the clips inside the hood and gently push the switch through the opening

Push new switch into the opening and spread the clips to hold the switch in the hood

Sign off on the switch replacement

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

Locate the blue wire on the control thermostat

Voltage across the blue wire on the control thermostat

Voltage is 120 volts ac for two wire 120 volt models and three wire 120/240 volt models or 200 to 230 volts ac for two wire 200 volt or 230 volt models

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

Locate the black wire on the control thermostat

Remove the capillary bulb and grommet from the tank

Voltage across the black wire of the control thermostat when the control thermostat is turned fully clockwise

Voltage is 120 volts ac for two wire 120 volt models and three wire 120/240 volt models or 200 to 230 volts ac for two wire 200 volt or 230 volt models

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

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

With the 'ON/OFF' switch in the 'ON' upper position, press the start switch

Check the voltage across the white/blue and white/green wires with a voltmeter

If voltage is present as described, proceed to #5

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

Check for continuity across the solenoid valve coil terminals

If continuity is present as described, reconnect the white/blue and white/green wire from the timer

Remove the wires from the switch terminals

Compress the clips inside the hood and gently push the switch through the opening

Push the new switch into the opening and spread the clips to hold switch in the hood

Sign off on the switch replacement