There s a clog in the sink.
Dishwasher drain not connected to sink.
The dishwasher sink drain is often interconnected.
If one is blocked there could be plumbing problems in the other also.
Check for a blocked air gap.
Connecting dishwasher to an air gap.
Try turning on the garbage disposal.
If an air gap fitting is used there will be two lengths of drain hose.
The drain line runs from the disposal up to the air gap and back down to the dishwasher.
Pull the dishwasher drain line from the side of the garbage disposal and place it in the bucket.
Also take a look at the hose clamp and drain solenoid.
All of these parts are vital to the operation of the drain valve.
If you think this may be the problem check to see if the drain plug is still intact if it is remove it.
Sponges check the drain hose connected to your dishwasher and make sure it s still securely connected to the sink or garbage.
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This can cause the water to drain improperly from your dishwasher or sink.
Install dishwasher drain but not into sink drain or disposal here s what i ve got.
Make the high loop then attach.
When a dishwasher hose connects to a sink without a garbage disposal an air gap a small slotted cylinder often made of stainless steel is installed on the top of the sink right by the faucet.
Drain connection with air gap and garbage disposal.
High loop to drain pull as much of the drain hose into the sink cabinet as possible.
The factory drain hose on the dishwasher which runs from the dishwasher to the smaller of the two tailpieces on the air gap and a 7 8 inch inside diameter hose that runs from the other tailpiece on the air gap to the dishwasher nipple on the garbage disposal.
Long water lines aren t much of an issue since there s water mains pressure involved but too long drain hoses can be a detriment to proper draining if the pump isn t strong enough.
Sometimes when garbage disposals are installed the drain plug cover is accidentally left on.
The air gap is sometimes located on the sink.
High loop to garbage disposal follow the same instructions as 1 except connect the dishwasher drain hose directly.
Dishwashers are normally connected to the hot water supply and drain under the sink and of course also need electricity.
Air gap to drain.