A SLOW/INCOMPLETE DRAIN symptom is usually caused by:
1) Blockage at the sink *air gap* if one is used.
Remove the chrome cover & plastic cap & remove any debris
that may have accumulated.
2) A blockage at the discharge connector on the *sink disposer*
or standard under-sink drain connector. (Remove & inspect)
3) A crimped/partially crushed dishwasher drain line either behind
the dishwasher or at the point where the drain hose enters
the under-sink cabinet (at the hole in the wood panel).
4) Small piece of debris in the drain hose at the connector to
the drain pump housing (under the dishwasher).
POOR WASH RESULTS on the LG LDF7811ST/01 model is usually a symptom of a failing SUMP ASSEMBLY. Replacing the SUMP ASSEMBLY (p/n: AJH31248604
) will dramatically improve cleaning results.