What E18 establishes—and what it does not
For this supported model, E18 provides a useful fault category: the expected drainage has not completed. It does not prove that the drain pump must be replaced. Bosch’s own troubleshooting path includes a blocked pump and a kinked or blocked drain hose, which is why Keepvero records a cause group rather than declaring a component failure.
The safety screen comes first
The structured flow first checks for smoke, burning smell, sparking, unusual heat, and active leaking near electrical parts. Any such answer ends the ordinary troubleshooting path. The result is a safety stop, regardless of the appliance age, repair price, or replacement economics.
What the structured flow checks next
After the hazard screen, Keepvero asks about a visibly kinked external drain hose, the result of the owner-accessible pump-filter check, and whether the fault remains or the pump sounds abnormal. The page does not instruct users to remove panels, test live parts, or perform internal electrical work.
Possible outcomes
Evidence of an accessible blockage can lead to the Bosch-documented owner checks, with precautions for unplugging and residual hot water. A persistent problem after those checks leads to qualified repair service. The confidence describes the cause group, not certainty that one exact spare part has failed.
The model suffix matters
The supported appliance identity is WAN282H3/52. The complete E-number—including the suffix—and the FD number should be used when locating documentation or checking part compatibility. A shortened family name is not sufficient evidence that a component fits.
Official sources
From diagnosis to verdict
The demo combines a €150–220 illustrative repair range, a €599 illustrative replacement, personalized running cost, and explicit lifecycle assumptions. Those commercial inputs are not attributed to Bosch. The deterministic engine uses them to calculate a repair limit, explains the comparison, and keeps the source status visible.