How to replace a dishwasher drain hose

Flip the house circuit breaker switch to the Off position to completely disconnect electrical power to the dishwasher (some older homes instead have a fuse that you remove from the fuse box). To verify that power is disconnected, make sure the display on the control panel can't be activated.  

Find the water supply valve for the dishwasher under the sink (or in the basement). Close the valve to shut off the water supply going to the dishwasher.

Using a 1/4-inch nut driver, remove the screws that hold the front access panel in place. Pull the access panel and the toe panel forward, remove them and set them aside. 

The junction box is at the front of the dishwasher just behind the bottom front access panel. Remove the cover on the junction box and disconnect the wires.

Remove the 2 mounting screws from the brackets that secure the dishwasher in the cabinet opening.

Pull the dishwasher out from under the counter. You should have enough slack in the water supply line and the drain hose to pull the dishwasher in front of the counter opening for the dishwasher. 

Reach under the dishwasher and squeeze the wire hose clamp that holds the drain hose to the drain pump—use pliers if necessary.  Pull the end of the drain hose off of the drain pump.

From the inside of the dishwasher tub, use a pair of channel lock pliers to remove the plastic nut that secures the water inlet assembly. 

The water inlet assembly secures the drain hose to the outside left panel of the dishwasher tub. Pull out the water inlet assembly  to release the drain hose from the bracket.

Separate the drain hose that goes to the kitchen sink drain from the dishwasher drain hose that extends to the drain pump.

Pull the drain hose from under the dishwasher and discard it.

Attach the new dishwasher drain hose to the drain pump, carefully working the hose onto the drain pump outlet and onto the connection so it seats properly and does not leak. Secure it with the wire hose clamp.

Route the new drain hose through the water inlet bracket the same way the original drain hose was routed. 

Reconnect the portion of the drain hose that goes to the kitchen sink drain to your newly installed drain hose. Make sure that the connection is secure.

Position the water inlet bracket on the side of the tub so  you can screw the plastic nut onto the bracket from the inside of the tub.

Carefully screw the plastic nut onto the water inlet from the inside of the tub. Hand tighten the nut  and then carefully tighten it another 1/4 turn to  seal the inlet.

Carefully push the dishwasher back under the counter. Reconnect the wires in the junction box and reinstall the junction box cover. Replace the bottom front access panel and toe panel.

Insert the screws into the mounting brackets that secure the dishwasher in the counter and tighten the screws.

Position the toe panel on the dishwasher and then position the access panel in front of the toe panel. Insert the mounting screws and tighten the screws firmly.

Open the water supply valve to restore the water supply to the dishwasher. Reset the house circuit breaker to restore electrical power.