GE PFE29PSDASS Manual page 144

Icemaker Diagnostics
At any time during the first 15 seconds of power up, the service diagnostic test
may be entered.
The service test is entered by pushing the feeler arm from the "out" position to
the "in" position and back again 3 times within 15 seconds (only 3 times!).
Note: If the icemaker had already started into the harvest cycle before being
disconnected from power, it may be impossible to properly move the arm.
The service test will consist of a harvest cycle followed by a water fill cycle.
The harvest cycle will be entered immediately, regardless of mold temperature
or feeler arm position.
The mold heater will be turned on for a minimum of 20 seconds.
At the end of the harvest cycle, a water fill cycle will be initiated for 5.1 seconds*
After the water fill cycle, the icemaker will enter the freeze cycle.
During the service diagnostic test, the feeler arm position sensor and motor
position sensor are tested by the control board software. The motor and water
valves are energized and can be visually observed for diagnostic purposes.
* Values are approximate and preliminary
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5/4/2012