Sink dishwater intrusion

You need to mount the drain hose up; i.e have a portion of it that is higher than the bottom of your sink so water can't backwash into the dishwasher. Although most (all?) dishwashers have a check valve that is supposed to stop this, sometimes, after years of use, that check-valve doesn't work 100%, and water can leak by it. By mounting the drain hose up, it will help prevent this problem.

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Check your drainage hose going to the kitchen sink. It should be routed up to an air gap on kitchen sink, or ran to the highest point as possible under the kitchen sink counter and then slope down into the disposer or branch wye tailpiece on your drainage piping depending on what your drainage configuration is. Not going up to the highest point, or an air gap, before draining into your drainage piping allows the water inside the dishwasher hose to drain back into the unit.

Hi,
You have a drainage problem and when you run water in the sink it backs into the dishwasher...take the sink drain apart and get it cleaned out and you will be okay again...

heatman101

Check the air gap! It may be clogged.

There is a great video explaining how to do t linked below.

My air gap was clogged, and after cleaning it the error 24 was gone...

The Diswasher Air gap how to clean it and why it important

Make sure the drain hose is not blocked or pinched.Also check where it drains into your sink pipeing to be sure food isnt blocking the drain way.
Its eather the drainage path is blocked or the pump stoped pumping.
Also, the drain hose must be installed so as to have a high spot higher than the sink drain or the water from your sink will be able to "run down hill" or drain into your dishwasher. Take a look and see!

also It sounds like your dishwasher does not have an air gap. Newer dishwashers come with an air gap installed, but they can be taken out. A quick fix for this is to:

Check the drain line under the kitchen sink. The drain line is supposed to run from the bottom of the cabinet, and run as high in the cabinet as you can get, (up to the bottom of the counter top) then connect the drain. This is called an air gap, and helps keep a little water in the drain line, which will prevent sewer gases from entering your dishwasher, and garbage disposal.

you need to tie up the drain hose under the sink above where it connects to the drain spigot to stop the sink water flowing down into dishwasher instead of the drain. A blockage in the sink drainage can also make the condition worse.

Your dishwasher water fill valve is defective. Remove power from the DW. Remove the bottom toe kick panel. The water valve has the incoming water line connected to it.Remove the wires from the valve. If the water stops entering you have a bad timer. If it makes no difference you have a bad valve. The valve is a replaceable part. The timer is a replaceable part.

check your connections under the sink. A dishwasher (unless it is a commercial one) is not built to heat water the water is supplied via the water heater via the sink angle stop. The dishwasher does however have a heating element inside used to dry the dishes. I would check the hot water side of the sink where the dishwasher is connected to see if the problem could be in that area. Check your setting on the machine. Good Luck on your repairs

Dave

Dbootin,

I suggest just putting a dedicated Drain in the island next to the Dishwasher. You can hide it in side the island. Under the house, tee into the Main Sewage drain.  You should not need to vent it as the sinks vent is near enough to keep you from worrying about that.