Fixing a Dishwasher’s Drain Pump

Today we’re gonna show you how to change and replace your drain pump on your dishwasher. You’re going to need a quarter-inch and a 5/16″ nut driver and a pair of slip joint pliers.  We’re going through these steps here because I recently had to do this over the phone with a friend who had a broken dishwasher in Austin (I had had the exact same issue and contacted and got it sorted out).  Since it was going to be a while before I was out to visit, we did a phone/skype repair session together.  I think we were both pretty impressed we got it done.

The best way to do this repair is with the dishwasher pulled out of the cabinet. We will need to unattach the mounting tabs at the top the dishwasher that pass into the bottom of your countertop. You also need to remove the lower access panel gain access to your electrical connection and to your inlet water connection – you need to make sure that that is turned off.

To get started, just remove the two quarter-inch hex head screws that hold that access panel in place. Just tilt it forward and let it rotate in place. You now have access to the electrical inlet connection, your drain hose your inlet water hose… just disconnect what you need to then just pull the dishwaser out of the counter cabinet.

drain pump Now that we’ve disconnected utilities to the dishwasher and pulled it from the cabinet, the easiest way to do the repairs is to lay it on its back. That gives access to the component on the bottom.

To change the drain pump, you’ll need to remove the 2 electrical connections from the front of the pump. Just pull those off. The pump is held in place with a little mounting bracket on the side of it. We also need to disconnect the outlet drain hose and the inlet from the pump.

We’ll start with the outlet drain hose, and there is probably going to be some water in that drain hose, so you need something to catch the excess water. You’ll need to loosen that 5/16ths screw on the clamp, slide the clamp down over the hose and wiggle the hose off the pump, and just set that aside.

Next with slip strip joint pliers we’ll depress the clamp to the dishwasher pump and slide that clamp upwards. And now pull that hose right off.

The mounting tabs are located inside this little box and you can depress the one closest to you using a flat blade screw driver and just pop up out of there. Then you should be able to twist the pump enough to rotate the other one over that opening. You can just discard that old pump now.

drain pump shematicWith the new pump it comes with a new hose and two new clamps, so we don’t need to transfer anything from the old pump. You just line up those two tabs with the slots on the side of the pump housing and press those into place, lining up the inlet hose at the same time. Make sure it snaps into position and press the hose firmly until it bottoms out.

With our slip joint pliers, slide that clamp down into position. Make sure you leave the tabs on that clamp where you can access them with pliers in the future.

Now we’ll rotate the drain hose back in the position and ensure it seats firmly on the new pump. We will take that clamp in the position and slide it fully onto the outlet, and tighten with our 5/16th nut driver. Reconnect the two wires – make sure they seat firmly in the opening.

And now we’re ready to put the dishwasher back into position and reinstall the kick plate, turn on the water supply, reconnect the electrical supply, and our repair of this dishwaser will be complete.

Kevin Mills