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Section 3 Troubleshooting
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7. DOOR LOCK SWITCH ANALYSIS: “DOOR WON’T UNLOCK”
1
The display reads
“
Please Open the
Door
”
, but the door can't be opened.
2
NO
Check
the black and white wires
from the door terminal on the
main board, through the molex
plug (75-165 models only) and
from the molex plug to the door
solenoid. Is the wiring
intact and properly
connected?
YES
Repair/replace the wiring as
needed.
Is
there voltage (70
Volts AC) between the
black and white
terminals on the main
board's door
terminal?
Replace the main board.
NO
Is
there voltage (70
Volts AC) between the
black and white
terminals on the door
lock solenoid?
YES
3
Replace the door lock solenoid.
NO
Is there voltage (70 Volts AC)
on the wiring between the
computer board and the door
lock solenoid?
Repair/replace the wiring as
needed.
YES
CFD1997S