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SYMPTOM
CAUSE and REMEDY
Lo is
continually
displayed
−
Temperature is below minimum (13.5
°
F or
-10.0
°
C).
−
Probe is disconnected or defective.
Hi is
continually
displayed
−
Temperature is above maximum
(105.0°F or 41°C).
−
Probe is short circuited.
Fan(s) or
heater not
operating
−
Verify whether the fan LED is on. If
LED is on yet fan or heater is not
operating, verify wiring, fan and fuse.
Refer Figure 5 for fuse location. If fuse
is blown, replace with fuse of same
type.
Display is
blank
−
Verify that the line voltage selector
switch is properly set.
−
Verify that the 10 pin flat cable
between the main board and the
faceplate board is connected.
TROUBLESHOOTING
APPENDIX
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