Bunn service manual SERVICE cont THERMAL CUT-OFFModels SA, STA & STFA

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SERVICE (cont.)

SERVICE (cont.)

THERMAL CUT-OFF (Models SA, STA & STFA)

Location:

The thermal cutoffs are located on both tank heater terminals.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the thermal cutoff from the tank heater terminal and the limit thermostat or wir- ing harness.

3.Check for continuity across the thermal cutoff terminals using an ohmmeter.

If continuity is present, the thermal cutoff is operating properly. If continuity is not present as described, replace the thermal fuse.

Removal and Replacement:

1.Disconnect the thermal cutoff from the tank heater terminal and the limit thermostat or wir- ing harness.

2.Remove thermal cutoff and discard.

3.Connect new thermal cutoff to the tank heater terminal and the limit thermostat or wiring har- ness.

4.Refer to FIG. 24 when reconnecting wires.

Thermal cutoff to BLK Lead

Thermal cutoff to WHI or RED Lead

P1593

FIG. 24 THERMAL CUT-OFF

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Contents BUNN S,SA POST OFFICE BOX SPRINGFIELD, ILLINOISFAX ST,STA STF,STFAWARRANTY USER NOTICES#00882.0000 USER NOTICES Continued#00656.0000 #02763.0000 #02765.0000 #02769.0000Electrical Hook-Up ELECTRICAL REQUIREMENTSPLUMBING REQUIREMENTS Models S & SA4B. Models ST, STA INITIAL SET-UP4A. Models S & SA 4C. Models STF & STFASTART SWITCH CLEANINGModels ST, STF, STA & STFA ON/OFF SWITCH OPERATING CONTROLSTROUBLESHOOTING PROBABLE CAUSE TROUBLESHOOTING contPROBLEM REMEDYTROUBLESHOOTING cont PROBLEM Dripping from sprayhead Beverage overflows dispenser cont Weak beverage Brewer is making unusal noises SERVICE COMPONENT ACCESSContents SERVICE cont CONTROL THERMOSTATSERVICE cont CONTROL THERMOSTAT cont SERVICE cont LIMIT THERMOSTAT ON/OFF SWITCH Models ST, STA, STF & STFA FIG. 8 SOLENOID START SWITCH Models ST, STA, STF & STFA SERVICE cont TANK HEATER SERVICE cont TANK HEATER Cont FIG. 14 BREW TIMER SERVICE cont BREW TIMER Early Modelscont DIGITAL BREW TIMER Late Models FIG. 16 DIGITAL BREW TIMERSERVICE cont DIGITAL BREW TIMER Late Modelscont LIQUID LEVEL CONTROL BOARD Models STF & STFA STFACont SERVICE cont TIMER RELAY Models STF & STFA SERVICE cont WARMER ELEMENTS SERVICE cont THERMAL CUT-OFFModels SA, STA & STFA Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251Page 29251