GE ETS22 Technical Service Manual page 54

Note:
• When no voltage at main control board, make certain to check for shorted fan motor (less
than 1k ohm between white and red or white and yellow). A shorted fan motor will
damage the replacement main board.
• To check fan speed, refer to evaporator fan speed information on page 20.
Check fan for obstruction.
Find obstruction?
Open door and leave open
for 3 minutes to initiate liner
protection mode.
Does fan begin running?
Unplug refrigerator to reset
main control board.
Reconnect power. Warm
freezer thermistor to 70 F
and set temperature controls
to 5 and 5.
Did evaporator fan start?
At the fan connector, check
for 13 VDC from the red to
white wire and 8 to 13 VDC
from the white to yellow wire.
Is the voltage correct for
Unplug J2 connector on the
main control board. Check
for 13 VDC between pins
J2-3 and J2-4.
Is the voltage correct for
Replace main
control board.
Evaporator Fan Not Running
YES
NO
YES
NO
Adjust settings and allow
YES
NO
YES
both?
NO
YES main control board and
both?
NO
Remove
obstruction.
Check thermistors
using thermistor
values or self-
YES
diagnostic test 0-7.
Thermistors pass
Test?
NO
24 hours to stabilize.
Replace
evaporator fan
motor.
Repair wiring between
evaporator fan motor.
– 52 –
Replace main
board.
Check wiring
connections. If OK,
replace thermistor.