182 Part Number STH025 11/16
5. Ohm Ice Thickness Probe
NOTE: Verify meter leads are properly connected to VOM
with the red meter lead connected to positive & the black
meter lead connected to negative.
Lead tips must be needle style to make contact with
the terminal. Notched probes are too wide to make
contact and must not be used.
• Disconnect Ice Thickness Probe from control board
• Connect red meter lead to the red wire and the black
meter lead to the black wire - Normal readings = 1.4
to 2.5 K’s.
• Reverse leads - Connect black meter lead to the
red wire, red meter lead to the black wire - Normal
readings = 1.2 to 1.5 K’s.
Pass Ohm values are within range - Check control
board voltage at the ice thickness probe
connection.
Fail Replace ice thickness probe.
6. Check control board voltage
• Set VOM to DC voltage scale - Check voltage across
the top and bottom pin - Normal readings = 3.25 to
3.35 VDC.
Pass Control board voltage is normal
Fail Replace control board
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