Whirlpool duet model # wfw9640xw00
. This washer is getting f 20 code after several minutes. Flow meter is good. Washer is filling to bottom of window. Have good water flow thru inlet valve. This unit will automaticcally have a f20 after six minutes according to tech info. I'm thinking the Pressure switch p# w10249845
could be faulty. In diagnostic mode an f64 comes up. Any ideas would be appreciated, thanks.