Bunn S, Operating & Service Manual

Page: 30 / 44

Page 30
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.
FIG. 24 THERMAL CUT-OFF
P1593
Thermal cutoff to BLK Lead
Thermal cutoff to WHI or RED Lead
29251 052500