Bunn ITCB Operating & Service Manual page 69

TROUBLESHOOTING (cont.)
PROBLEM
Water will not heat or display shows
HEATING TIME TOO LONG.
PROBABLE CAUSE
1. Limit Thermostat
2. Temperature probe
3. Toggle switch
Page 69
REMEDY
Remove power from the brewer.
Check for continuity through the
limit thermostat. CAUTION: Do not
eliminate or bypass limit thermo-
stat. Use only replacement part
29329.0001.
Remove the probe from the grom-
met and submerge in a water bath
of approximately 70°F (21°C).
Connect an ohmmeter to the pins
in the connector. At 60°F (16°C),
the reading should be 15.3k ± 2k
OHMS, at 70°F (21°C) the reading
should be 11.8k ± 2k OHMS, and
at 80°F (27°C) the reading should
be 9.3k ± 2k OHMS. If the probe is
within these parameters, reconnect
to the control board.
Check that the toggle switch connec-
tions are secure and properly wired.
Check the toggle switch selects the
correct voltage.
36748 111904