Bunn Hot Water Dispencer H5X-18-120

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

Thermistor disconnected from J5 on control board

Resistance across thermistor (Ohm)

Resistance in the range of 9KOhm (room temperature) to 2KOhm (200°F)

If resistance was not as described, replace the control board

Sign off on the steam sensor test

Warning: This procedure requires trained personnel with PPE!

Disconnect the dispenser from the power source

Remove the blue wire from terminal 1 and the pink wire from terminal 4 of the circuit board

Voltage across terminals 2 and 3

Disconnect the dispenser from the power source

Reconnect the blue wire to terminal 1

Connect a piece of insulated jumper wire to terminal 4

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

Does the LED glow from the meter's battery power source?

Sign off on the Dispense Switch Test

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

Voltage verified at the power source

Continuity present across the safety overflow switch red wires when the plastic float is raised

Continuity returns when the plastic float is lowered

Is continuity present as described?

Black wires disconnected from the safety overflow switch

Nut removed beneath the copper overflow cup

Entire switch assembly removed from the cup