180 Part Number STH025 8/12
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
•
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 KΩ'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 KΩ's.
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 Ohm values are within range - Check control board
voltage at the ice thickness probe connection.
Fail
Replace ice thickness probe.
Pass Control board voltage is normal
Fail
Replace control board
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