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Caution:
Please read our safety
information before attempting any testing or repairs.
Before testing the control module, unplug the
refrigerator to avoid an electrical shock hazard.
There are two types of ice makers, those in which
all of the parts can be individually replaced and those in which
some of the parts are clustered together into a control module.
To determine which model you have remove the outer face plate.
If there is knob, pull it off first, then pry off the face plate
with a small screwdriver.
A modular unit will have several holes in the
module, each marked with a letter (similar to the one pictured
below). These holes are for test probes. If there are no holes
then the ice maker is a component model and the components can
be tested individually. For component models, refer to the individual
component's in the diagnostic table.

In this section we will test the
ejector motor and mold heater. The thermostat
is a separate component and covered in another article.
Testing should be done with the
power off, the shutoff arm in the down, "on" position
and the ejector blades in the "start" position. The
position of the blades will vary among ice makers, but the start
position is always with the blades over (not in) the ice mold
tray. If the ejector blades are in the mold, it will not be possible
to properly test the control module. Furthermore, if the blades
are in the mold area, then they did not complete their cycle,
and may suggest a failure of the modular unit.
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