Replace sump seal whirlpool dishwasher

Where is it leaking from? It'd it is under the door, check the door gasket for tears.

Would love to help but need manufacture and model #

The dishwasher has a tub gasket and the door gasket at bottom of door.
Item 3 in this diagram is tub gasket
http://www.searspartsdirect.com/partsdirect/part-model/Whirlpool-Parts/Dishwasher-Parts/Model-DU1100XTPT9/1198/0130000/W0705061/00007?blt=06&prst=&shdMod=

and item 14 is the door gasket shown in this diagramhttp://www.searspartsdirect.com/partsdirect/part-model/Whirlpool-Parts/Dishwasher-Parts/Model-DU1100XTPT9/1198/0130000/W0705061/00003?blt=06&prst=&shdMod=

This is commonly caused by a worn door seal. Over time, these seals compress to the point where they no longer seal correctly, or food particles and grime get caught between the door and seal and leave small air gaps. The silverware tray (if located along the left or right side) can also cause damage to the door seal as utensils get caught on the seal surface as you roll the lower rack in and out of the tub. As water splashes up against the inner door facing it rolls out the bottom of the door, or down along the sides instead of staying in the tub. The only other items that can contribute to leaking are:

1. A dishwasher that is not level, which causes the door not to seal properly.

2. The inner door panel being warped causing the door facing not to be even for the gasket to seat properly.

3, Dish placement. If you place bowls, serving trays and large tumblers in the front row of the bottom rack on some dishwashers it can contribute to water being deflected over the front edge of the tub and out the bottom of the door (Believe it or not, I've seen it happen).

NOTE: Most dishwashers do not have a seal across the front lip of the tub. That's why it's important to have a good door seal and to load it properly.

If you've loaded the dishwasher properly and confirmed it is level (front to back and side to side), then here are your options:

1. Replace the inner door panel at a cost of about $115.

2. Replace the door seal at a cost of about $35-$40.

Parts can be purchased from any of the following websites:

searspartsdirect.com
appliancepartspros.com
pcappliancerepair.com
repairclinic.com

Use whatever parts source you like, but I have found these to be the cheapest and most reliable sites to order parts from. Shop all of them for the best price.

NOTE: The inner door panel is listed under the Door Parts section. The tub gasket will be listed under the Tub Parts section.

I think I would pursue the cheaper option, first. Its also the much simpler option. To replace the door seal, follow these steps:

1. Pull the old door seal from the groove around the wash tub facing. Take note of which surface area of the gasket is inserted in the groove and which surface is facing the door. It may not seal properly if you install the gasket the wrong way.

2. Clean the area really well to ensure there are no food debris or soap deposits. Also clean the inner door area where the door meets the gasket. You need a clean surface for the best results.

3. Locate the center mark of the new gasket. This will be a small paint spot or small groove on the gasket (this surface is the side of the gasket that will be inserted in the groove around the tub facing). If there is no center mark, fold the gasket in half and mark the location with some chalk, or hold with your fingers.

4. Locate the top center part of the wash tub facing and align the center mark of the door gasket at that point. Begin pushing the gasket into the groove with your hands and work your way around and down along each side.

5. Make sure the gasket is inserted all the way around the tub facing to the point where it meets the wash tub bottom. You can pull the gasket out and readjust as necessary.

This repair should take you about 30 minutes or less to complete. Its simple and requires no tools. The door will be tough the shut for a while until the gasket compresses and takes the door shape. Do not slam the door if it becomes difficult to shut. Simply close the door and the push firmly at the point just above the door latch until the latch clicks. Slamming the door can damage the control panel components, the door latch and/or the hinges. If you have questions, or require additional assistance, please let me know. I hope this helps you.

Without knowing the manufacturer and model number of your dishwasher, it is hard to be specific but ...
above the drain connector on most dishwashers seals of the seals the sump area and motor(s)

If this dishwasher is many years old, my guess is tat it has deteriorated to the point of not being repaired and the leak could be caused by a rusting hole in the cabinet. Replacing the dishwasher may be your only viable option.

This type dishwasher has a gasket/seal beneath the lower rack (sump gasket)
You would be able to see it if you pulled out the lower rack and removed the lower arm and filter (please only do this if you are mechanically inclined. Also, replacing a sump gasket is a MAJOR repair and pretty tough to do. You don't say how old this dishwasher is but if it is more than 4 years old, unless you have an extended warranty, it is probably best to replace rather than call for repair service.

If your dishwasher leaks, check these:
Main tub seal
Door gasket or seal
Water-inlet valve
Hoses

Main tub seal
Note… If the main motor of your dishwasher is mounted vertically, beneath the center bottom of the dishwasher, the following instructions probably apply to you. But if your motor is mounted horizontally, the pump isn't serviceable--you need to replace the entire pump and motor assembly.

The main tub seal is beneath the drain impeller. It prevents the water in the dishwasher from leaking out near the shaft of the motor. To get to the seal, which is inside the dishwasher, remove the:

1. Lower rack
2. Spray arm
3. Spray arm support
4. Wash/drain impellers


Then pry the seal out of its housing and replace it.


Door gasket or seal
Over time, door gaskets and seals harden and lose their ability to seal properly. You can't repair the seals. You need to replace them if they've begun to leak. 


Water-inlet valve
The water-inlet valve, itself, seldom leaks. But, the water-supply line from the house and the rubber tube leading from the valve to the inside of the dishwasher may leak. Tighten or repair/replace these as necessary.

The water-inlet valve could mechanically stick open. When that happens, the water continues to flow into the dishwasher, which then floods your kitchen. Turn off the water supply to the dishwasher, and replace the valve.

Hoses
Behind the lower access panel on your dishwasher are several rubber or plastic hoses. If the leak appears at a connection, try a new clamp. If that doesn't work, replace the hose.
thanks for using FixYa

You can get a product called dishwasher majic. It is used to clean the tub of a dishwasher. Big box stores (LOWES, HOME DEPOT) should have it. There is not charcoal in the unit. I suspect is grease from the rubber seal around sump assembly.