GE GEH Series Service Manual page 63

The control varies the fan speed using pulse-width modulation
to maintain the desired evaporator temperature based on
ambient temperature. When the room temperature is low, the
fans run at a higher speed to move additional air across the
evaporator. The average fan speed based on average room
temperature is approximately 3000 RPM, which is ~56 dBA.
The fans run for 90 seconds
before the compressor
starts and for 10 minutes
after the compressor cycles
off.
NOTE: Unless the unit switches to
electric mode, which turns the fans
off immediately.
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