Bunn Hot Water Dispencer H10X-60-208

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

Voltage across terminals 3 & 4 of the electronic control circuit board

Reconnect the dispenser to the power source

Voltage across the tank heater terminals

Disconnect the dispenser from the power source

Was voltage present as described?

If voltage was not present as described, contact Bunn-O-Matic to order an electronic control board and temperature sensor for evaluation and proceed to #9

Warning: Disconnect the switch harness from CBA before starting the test

Continuity present when switch is pushed in

LED glows from the meter's battery power source

Sign off on the Dispense Switch Test

Check the valve for coil action

If no sound is heard, proceed to next step

Check for blockage in the valve

Connect voltmeter leads to the coil terminals

If voltage is present but no coil action is observed, valve is defective

Check the dispenser wiring harness

Check the control board for proper operation

Disconnect the dispenser from the power source and allow to cool

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

Disconnected the dispenser from the power source

Disconnected the thermistor from J5 on control board

Loosened the set screw and the two screws securing the two half blocks together

Removed thermistor assembly from overflow tube

Installed new thermistor on tube and slid down until it contacts the flared end

NOTE: It's critical that the thermistor be centered directly under the tube opening

Snugged the set screw so the block assembly does not move around easily

Connected the thermistor to J5 on control board

Disconnect the dispenser from the power source

Check the voltage across the terminals of the tank heater with a voltmeter

Disconnect the dispenser from the power source

Is voltage present as described?

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

Remove the tank heater from the tank lid and inspect it for cracks in the sheath

If the sheath is damaged, replace the tank heater