Bunn Hot Water Dispencer H5X-60-240-212F

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

Safety overflow switch operating properly after reconnecting each of the red wires to the black wires

Black wires disconnected from the safety overflow switch

Nut removed beneath the copper overflow cup

Entire switch assembly removed from the cup

Remove the wires to the tank heater

Remove the 8-32 nuts from the tank heater flange

Inspect the tank heater gasket and replace if necessary

Securely install the new tank heater. Be certain of a watertight seal

Refer to schematic wiring diagrams when reconnecting the wires

Sign off on the tank heater replacement

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. Connect the dispenser to the power source.

Disconnect the dispenser from the power source

If voltage is present as described, proceed to next step

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 shows no sign of damage, proceed to next step

If the sheath is damaged, replace the tank heater

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