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Damper Door Not Operating
Push damper halfway closed.
Unplug refrigerator to reset
main control board.
Set temperature controls to 5 and 5
Reconnect power.
Does damper door move
after immediately
reconnecting power?
(you have 10 seconds to check)
Yes
Push on damper door to check
manual movement.
Is the damper door stuck?
Damper jammed
Remove blockage or
replace damper
Yes
Unplug J3 connector from main control
board. Unplug refrigerator to
reset, then reconnect power.
Do you have 6VDC between pins
J4-3 (common) and each of the
pins J3-1, J3-2, J3-3 and J3-4?
(you have 10 seconds to check)
Unplug harness connector at damper.
Measure resistance between the
yellow
and red/black wires and between the
white/brown and blue/yellow wires.
Do you measure approximately
420 ohms for both readings?
Replace main
control board
Replace damper
Yes
Verify thermistors are within proper
range using temperature resistance
chart on page 49
Is the resistance within range?
Check wiring connections
I f w ir in g i s O K,
replace thermistor
No
Look for wiring problem
between main control board
and damper. If wiring is OK,
replace damper.
Yes
No
Replace main
control board
Yes
No
No
No