GE PFE29PSDASS Manual page 116

Main Control Board
The main control board operates some or all of the following outputs
depending on the model identification used:
Freezer temperature control using compressor, fans and 3-way valve
Fresh Food temperature control using compressor, fans, 3-way valve and
damper (single evaporator models)
Ice Box temperature control
Deli pan control using the damper, fan and heater
Variable fan speed control with RPM feedback for the condenser, fresh food
and freezer evaporator, ice box and deli pan fans
Freezer and fresh food evaporator defrost control
Icemaker control for models with an icemaker in the freezer
Control of the isolation water valve
Control of mullion and ice port heaters based on external temperature and
relative humidity
Control of the fill tube heater for the icemaker located in the freezer
Control of the interior LED lighting in the fresh food compartment
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5/4/2012