Model Number: WDF510PAYS6
Brand: Whirlpool
Age: 1-5 years

Noticed dishwasher not cleaning properly( still greasy or soap film left on some dishes) nor was it drying. Have replaced float assembly, heating element and still not getting hot. Hot water hookup only which seems to work fine( hot water to sink works) We ran empty and getting blackish residue throughout inside of machine. Took apart and checked if something stuck in pump, checked hoses to see if free flowing, checked filters and spray arms, all seem clean. Even checked conductivity with multimeter on the high temp thermostat and terbidity sensor,,,HELP! Anyone have an idea of what it could be?