| Symptom | Likely Location | Action | | :--- | :--- | :--- | | Water in bottom of tub; no draining sound | Drain pump failure or obstruction (e.g., glass in impeller) | Check pump impeller manually. | | Water drains slowly, then stops | Partial hose clog or high loop obstruction | Proceed to hose inspection. | | Water drains but backs up into sink | Clogged sink drain or disposal knockout plug still in place | Run sink water; check disposal. | | Gurgling noise during drain | Air gap or high loop restriction | Clean air gap cap. | | No error code but water remains | Check float switch or control board | Electrical diagnosis. |

If the drain hose connects to a garbage disposal, ensure the disposal’s drain plug (knockout) was removed during installation. A still-intact plug is a 100% blockage masquerading as a hose clog. 5. Step-by-Step Remediation Protocol Safety First: Disconnect power to the dishwasher (unplug or trip circuit breaker) and turn off the water supply. Place towels under the front of the machine.

In intermittently used dishwashers, standing water in a sagging hose promotes bacterial and fungal growth. This slimy biofilm adds viscosity and cohesiveness to loose debris. 4. Differential Diagnosis: Is It the Hose or Something Else? Before disconnecting the hose, confirm that the clog is indeed in the hose, not elsewhere.