Bunn Brewer STF

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

WHI wire connected to the terminal block and the wire from the warmer element to the 'ON/OFF' switch

Voltage across the WHI wire from the terminal block and the wire from the 'ON/OFF' switch to the warmer element

If voltage is not as described, check brewer wiring harness

Continuity across the two terminals on the warmer element

If continuity is not as described, replace the warmer element

Sign off on the Brewer Warmer Elements Test

Disconnect the brewer from the power source

Remove the WHI/RED wire from the 'A' terminal and the WHI/GRN wire from the 'B' terminal on the relay

Check for continuity across the 'A' and 'B' terminals

If continuity is present as described, reconnect the WHI/RED and WHI/GRN wires to the relay

If continuity is not present as described, replace the relay

Remove the WHI/RED wire from terminal 5 and the WHI/BLU wire from terminal 7 on the relay

Check for continuity across terminals 5 and 7 by manually closing the relay contact. Continuity must be present until contact is released

If continuity is present as described, reconnect the WHI/RED and WHI/BLU wires to the relay, relay is operating properly

If continuity is not present as described, replace the relay

Remove all wires from the timer

Remove the circuit board and dial plate from the brackets

Install the new timer circuit board as described in Late Model Timer Section

Install the Timer Setting decal, provided with the replacement timer kit, on the back side of the front access panel

Sign off on the timer replacement

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

Brewer disconnected from power source

Thermal cutoff disconnected from the tank heater terminal and the limit thermostat or wiring harness

Continuity across the thermal cutoff terminals (ohmmeter reading)

Continuity present across the thermal cutoff terminals

If continuity is not present, replace the thermal fuse

Sign off on the Brewer Thermal Cut-Off Test

Warning: Always disconnect the brewer from the power source before cleaning

Cleaned all surfaces with a damp cloth rinsed in mild, non-abrasive, liquid detergent

Checked and cleaned the sprayhead, ensuring all holes remain open

Inserted the deliming spring all the way into the sprayhead tube, leaving no more than two inches visible, and sawed back and forth five or six times

Is the water in your area hard?

Note: In hard water areas, step 4 may need to be done daily to prevent liming problems in the brewer

Sign off on the daily brewer cleaning