GE PSC21MGM, Technical Service Manual

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Damper Door Not Opening or Not Closing
Run Service Diagnostic Test ( 1-0 )
Damper door test
Check damper door phyiscal
movement at beginning of test.
Does it move?
Damper door good!
Look elsewhere for the
problem
Yes
Push on damper door to check
manual movement.
Does the damper door move?
Damper jammed!
Replace damper
No
No
Check continuity at connector J3.
400 ohms J3-1 to J3-2 ?
400 ohms J3-3 to J3-4 ?
Check for same resistance
values at damper motor
No
Damper motor defective
replace motor
No
Unplug refrigerator, then power up
Check for 6VDC from J3-1 to J3-4.
Do you have the correct voltage?
( You can only read voltage during
10 seconds of intial start up)
Yes
Replace the main board No
Replace damper
Yes
Run Service Diagnostic Test ( 0-7 )
Thermistor Check - see page 53
Did test check OK?
Repair fault No
Yes
Yes
Repair wiring harness
Yes
Caution: Unplug power when disconnecting and
connecting connectors on the board.