Follow the Water Out
Standing water at the end of a cycle means the machine could not pump the water out. As part of the BSH family, a Gaggenau may also show an E-series drainage code alongside the standing water. Either way, the diagnosis follows the drain path from the tub outward: filter, sump, pump, hose, and the sink connection.
Most drainage faults are mechanical blockages rather than electronic failures, which is good news because many are straightforward to clear.
The Checks in Order
Start with the filter and sump at the bottom of the tub, since a clogged filter is the leading cause; clear any food debris and glass. Check the drain hose for kinks behind or under the unit, and inspect the air gap or disposer connection at the sink, a common clog point, especially if a disposer knockout plug was left in place at installation. If the path is clear and water still stands, the drain pump may be jammed by debris or failing.
Clearing the filter and connections resolves many cases. A drainage fault that persists after those checks points to the pump or control and should be diagnosed.
Cause Reference
| Check | Cause | Action |
|---|---|---|
| Filter and sump | Food or glass debris | Clean thoroughly |
| Drain hose | Kinked or blocked | Straighten or clear |
| Air gap / disposer | Clog or unremoved plug | Clear connection |
| Drain pump | Jammed or failing | Test and service |
Do Not Run It Again with Standing Water
Repeatedly restarting a dishwasher that will not drain does not clear the blockage. Bail the standing water, clear the filter and connections, and diagnose the pump if it persists.
Book a Repair with a Specialist
Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.