Bunn Hot Water Dispencer H5E-18-120

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

Continuity present when switch is pushed in

Connect ohmmeter red lead to the red wire (+) and black lead to tan wire (-)

Select the resistance/continuity or diode scale

LED glows from the meter's battery power source

Sign off on the dispense switch test

Disconnect the dispenser from the power source

Voltage across terminals 3 & 4 of the electronic control board

Check the dispenser wiring harness if voltage was not present as described

Remove the pink wire from terminal 5 of the electronic control assembly

Voltage across terminals 1 & 4 of the electronic control board

Disconnect the dispenser from the power source

Replace the electronic control board and the temperature sensor in the tank lid if voltage was not present as described

Reconnect the pink wire to terminal 5 of the electronic control assembly

Loosen the compression fitting, remove the probe from the tank lid, and inspect it for mineral deposits. Replace it if necessary. Keep the exposed ends of the probe away from any metal surface of the dispenser

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

Disconnected the dispenser from the power source

Remove the black wire at the limit thermostat coming from the terminal block

Black wire removed from the limit thermostat

Voltage across the black wire and the white or red wire of the terminal block

If voltage was not present as described, check the dispenser wiring harness

Voltage was present as described

Reconnect the black wire and proceed to next step

Disconnect the dispenser from the power source

Check the voltage across terminals 3 & 4 of the electronic control circuit board with a voltmeter

Connect the dispenser to the power source

Disconnect the dispenser from the power source

Check the voltage across the tank heater terminals with a voltmeter

Connect the dispenser to the power source

Disconnect the dispenser from the power source

Remove all wires from the level control board

Remove two #8-32 screws holding level control board and mounting bracket to the component bracket

Install the new level control board and mounting bracket to the component bracket

Upload a photo of the reconnected wires

Sign off on the board replacement