| 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. |
Despite pre-rinsing, small particles (rice, quinoa, seeds, coffee grounds, lettuce shreds) pass through the filter screen. Over many cycles, these particles settle in the low points of the corrugated hose, especially if the hose sags. The corrugations create a "settling basin" where water velocity drops, allowing solids to deposit. dishwasher drain hose clog
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. | Symptom | Likely Location | Action |
Hot water dissolves grease during the wash cycle. As the wastewater cools in the drain hose during the pump-out phase, grease solidifies. Over time, it coats the inner wall of the hose, creating a sticky matrix that captures food particles, forming a hard, toothpaste-like or rubbery plug. This is analogous to arterial plaque in blood vessels. | | Gurgling noise during drain | Air