F/DL = Door Lock Error
A Door Lock Error occurs if the door cannot be locked.
It will try to lock it six times before displaying the error code.Possible Causes
■ Door lock mechanism is broken or removed from door.
■ Door switch/lock unit failure.
1. Unplug washer or disconnect power.
2. Check door switch/lock unit.
3. Check the wire harness connections to the door switch/lock unit and Central Control Unit (CCU).
Your model uses door switch lock assembly part # 8182634
Your model uses Central Control Unit (CCU) part # 8182697
Diagrams for model GHW9400PT0
I have also attached a copy of the tech sheet for your washer.
The tech sheet has a lot of troubleshooting information in it that you may find helpful.
I took the lower panel off and reset the button.
What button would that be?