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

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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