Bunn Hot Water Dispencer H10X

Both wires removed from the limit thermostat terminals

Two #10-32 nuts removed attaching the limit thermostat to the top of the tank

New limit thermostat installed and secured into place with two #10-32 nuts

Wires reconnected according to schematic wiring diagrams

Sign off on the thermostat replacement

Warning: Ensure the dispenser is unplugged before starting the procedure

Both wires removed from the thermostat terminals

Top lid removed from the dispenser

Two #6-32 screws removed from the thermostat

New thermostat fastened to the mounting bracket

NOTE: Make sure that the capillary tube is away from any electrical termination and is not kinked

Grommet slid to the red mark on the capillary tube

Bulb inserted through the hole in the tank and grommet pressed firmly

Warning: Disconnect the dispenser from the power source and turn-off the water supply to the dispenser

Pink wire removed from terminal 5 of the electronic control board

Voltage across the solenoid valve coil terminals

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

Both wires removed from the solenoid valve coil terminals

Continuity present across the solenoid valve coil terminals

If continuity is not present as described, replace the solenoid valve coil

Solenoid valve coil action checked

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

Thermistor disconnected from J5 on control board

Resistance across thermistor (Ohm)

Was the resistance as described?

If resistance was not as described, replace the control board

Sign off on the steam sensor test

Disconnect the dispenser from the power source

Check the voltage across the terminals of the tank heater with a voltmeter. Connect the dispenser to the power source.

Disconnect the dispenser from the power source

Is voltage present as described?

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

Check for continuity across the tank heater terminals

Is continuity present as described?