Disposal works, won't drain, other side of sink drains fine.

The two drains are connected, but below the disposal. Likely if it's not draining down, you still have a clog, and the person the "cleared" the drain didn't.

there is probably nothing wrong with Dishwasher itself.
Your Sink drain is stopped up or your Garbage disposal is clogged.
usually, dishwasher drain is connected to the Garbage Disposal, but if the dishwasher empties the water into the Garbage disposal, if its clogged then water will come out of the sink. Same if sink is clogged between sink and sewer.


If you fill up your sink and then water drains away, then you know your sink itself is not the problem. If its only the Garbage disposal side that does not drain, its the garbage disposal that is clogged.

plug the one side of the sink so as to create a sealed enviroment for the plunger to work weffectively ... plung the open side ..
If this does not work , try running a metal coat hanger thru the outlet at the disposal exhaust line.

Remove tubular pipes under sink and clean out disposal.
Copy following links for steps for clogged disposal:
http://waterheatertimer.org/How-to-repair-and-install-Garbage-disposal.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Sounds like a clog at or beyond the P trap of the sinks. With water coming back into the sinks, it has to be part of the drain line that is common to both sinks. If you try and unclog the sink, work on the side that does NOT have the garbage disposal in it. A small hand snake for sinks might do the job. You could also try a plunger on either side, but when you do, put a wet rag over the other drain so you are not just pushing air back and forth. Work on one side with the plunger while holding the wet towel down tight over the other drain. Sounds like a clog that was there prior to you putting the lemon in the GD.

There is often a plug in the ISE as many people use them without have a dishwasher connected to them. Quite often it is just a thin plastic membrane that can be knocked out with a screwdriver. There should also be a note to this effect in your installation instructions for the ISE.

If this connects into a tee between the sinks, usually if the tee is in the middle of sinks, then often there is a divider in the tee to keep water from backing up the other drain. Remove the tee and inspect to be sure it isn't cloggged. Also put a bucket under the outlet. Try running it this way, if you get good flow you know the disposal is working

It sounds like an issue with the sink drain rather than the dishwasher. Many dishwashers are connected to a double sink, one bay of which contains a garbage disposal. If yours is connected in that configuration, run the disposal to clear any food debris that may still be present while running the HOT water into the disposal.

If you have no disposal or if the dishwasher is connected to the other non-disposal bay, check the sink drain again for proper drainage.

The easiest way to do this is to put a plug in the drain (both sides, one at a time), then fill the sink about half way with luke warm water. Then reach in and pull the plug from each side, watching to see how each side drains, but especially the side with the dishwasher connected. If it's slow draining, focus your efforts on clearing the drain on that particlular side of the sink. Try a plunger first before resorting to other methods to clear the sink. If you plunge the dishwasher side, get underneath the sink and pinch off the discharge line from the dishwasher if possible. A pair of vise grips works well, but don't overtighten them.

Some dishwashers have a soft disposal that can eject enough ground up particles into a sink to cause plugging up over time, especially if the dishwasher empties into the disposal side.

Your drain line is clogged, beyond the sinks. You might be able to use a plunger to clear it. Seal off one the drains and use the plunger in the other. After you get it cleared, run pure hot water for a few minutes to melt the junk out of the line. When using the disposer, use cold water only, NEVER hot. If this doesn't get your drain flowing, you will have to snake the drain--to the main drain.

You have a clogged trap. Try a plunger, draino or disconnect the trap and clean it