FH is basically saying there's not enough water coming into the unit or the pressure switch or connections aren't working properly.
Press PAUSE/CANCEL twice to clear the display.

Potential Causes

• If there is no water in the unit:
• Make sure that both valves at the water source(s) are turned on all the way.
• Check for plugged or kinked inlet hoses or plugged screens in the inlet valves
• Verify inlet valve operation
• If there is water in the unit:
• Verify Drain pump operation
• Pressure Switch Hose is in good condition and properly connected to Tub and Pressure switch
• Verify there is not a siphon problem
• Verify wire harness connections to; Inlet Valves, Pressure Switch, Drain Pump, Flow Meter, and Central Control Unit (CCU)
• Check all hoses for possible leaks
• Verify pressure switch operation
• Verify flow meter operation
• Verify CCU operation