E4 code has come up on whirlpool adp 7000 - Whirlpool Dishwashers

SOURCE: Hi My Whirlpool ADP 7000

Hello mags.... Thaat error code indicates that the machine is not discharging the drain water as it should. It could be a partial blockage within the machine somewhere between the drain pump - drain hose - and your kitchen sink drain. Begin by checking to be sure that the kitchen sink drains properly. If it does not, check the trap and also check the garbage disposal if you have one. If all is well there, remove the lower front panel on the dishwasher itself. Under the dishwasher tub you will see the drain hose connected to a small pump just above the floor. Disconnect the drain hose from the pump [plan on 3 cups of water escaping]. Remove the drain hose by also disconnecting it under the sink and then check the entire length by running water through it. Also remove the pump [held in place with 2 screws] to physically inspect it and remove any debris. Joe Thanks for choosing Fixya!