from WFW9200SQA12 Tech Sheets F20
Verify that the pressure switch hose is in good condition and properly connected to tub and pressure switch.
1.Unplug washer or disconnect power.
3.Verify wire harness connections to ... pressure switch, flow meter, and Central Control Unit (CCU).
5.Plug in washer or reconnect power.
6.Verify pressure switch operation.
7.Verify flow meter operation by blowing air through the part and measuring the resistance.
8.Verify CCU operation by running a Diagnostic test or any cycle.