There's standing water in the bottom
Water should leave through the filter, the drain pump and the hose — when it stays, one of them is blocked or stopped. The drain pump is the part that fails most often. Same puddle, three different causes — that's why we test before we replace anything.

- How it should drain: through the filter and the sump to the drain pump, then up the hose over a high loop or an air gap to your sink drain.
- If the filter clogs: water stands above it, and the sump below stays almost empty — the pump has nothing to move.
- If the drain pump stops: the sump is full right up to the pump, and the hose stays empty.
- If the hose kinks: everything is full up to the fold; past it, the hose is empty. Here it's behind the machine; it also happens under the sink.












