Bosch Dishwasher Error Code E02 — What It Means and Why It Happens
The Bosch E02 error typically indicates a problem with water filling or water-level detection inside the dishwasher. In many Bosch models E02 is reported when the machine senses insufficient water flow or a fault in the inlet/fill detection circuitry (flow meter, float/pressure sensor, or inlet valve). This error can be triggered by a closed or kinked supply, blocked inlet strainers, a failed inlet valve, a clogged or faulty flow meter, or a stuck float/pressure chamber. Common user impacts include interrupted wash cycles, dishes not being cleaned properly, longer total cycle times as the machine retries to fill, and — in some cases — increased risk of leaks or water damage if a fault goes unaddressed. Because the dishwasher controls rely on correct water sensing, ignoring E02 may lead to frequent stoppages and inconvenient repeat cycles.
Common Causes
- Closed or partially closed household water supply valve
- Kinked or pinched inlet hose restricting flow
- Clogged inlet hose strainer or filter screen at the supply connection
- Faulty or sticking water inlet valve (fails to open/close properly)
- Defective flow meter (turbine) or blocked flow meter path
- Stuck or faulty float switch / pressure chamber (water level sensor)
- Low incoming water pressure from the house plumbing
- Electronic fault on the control board or wiring/connectors to sensors
- Debris or hard-water buildup inside the inlet path or filters
Troubleshooting Steps
- Power cycle the dishwasher: turn off power at the wall or breaker for 1 minute, then restart. Some transient faults clear with a reset.
- Cancel the current program and attempt a short diagnostic or refill cycle per your model’s manual to reproduce the issue.
- Verify household water: ensure the water supply valve to the dishwasher is fully open and other fixtures have normal flow.
- Inspect the inlet hose for kinks, twists, or compression; straighten or replace if damaged.
- Turn off water, disconnect the inlet hose at the valve, and check/clean the small strainer/screen on the hose connection. Reconnect securely.
- Check water pressure: low supply pressure (often below ~20 psi / 1.4 bar) can prevent proper filling — consult a plumber if pressure is low.
- Listen for the inlet valve when starting a cycle: if you don’t hear a click or hum when filling should begin, the inlet valve may be faulty and require replacement.
- Remove the dishwasher filter assembly and inspect the area for debris that could block the flow meter or pump; clean as needed. Some flow meters sit behind the lower filter basket.
- Inspect the float/pressure chamber at the base for obstructions or stuck position. Caref