Bosch dishwashers may refuse to begin because a child lock, delayed start, door-closure issue, or water-supply condition is present.
Safety first: Unplug the appliance before touching accessible hoses, filters, or panels. Do not bypass a door or lid switch, probe live wiring, or continue using an appliance with smoke, a burning smell, sparking, a hot plug, repeated breaker trips, or water near electrical parts.
Most Likely Causes
1. Child Lock
Check the display and visible connections first.
2. Door not latched
Do not force moving parts or bypass safety switches.
3. Delay Start
Repeated symptoms require proper diagnosis.
4. No power
Check the display and visible connections first.
5. Water supply off
Do not force moving parts or bypass safety switches.
6. Latch or control fault
Repeated symptoms require proper diagnosis.
Step-by-Step Diagnosis
Step 1: Pause or cancel safely
Follow the instructions for the exact model.
Step 2: Inspect accessible hoses or door area
Disconnect power before handling accessible parts.
Step 3: Check external installation
Stop if water or electrical hazards are present.
Step 4: Correct a simple load or setting
Follow the instructions for the exact model.
Step 5: Restore power briefly
Disconnect power before handling accessible parts.
Step 6: Retry one normal cycle
Stop if water or electrical hazards are present.
Components Related to This Symptom
A qualified technician may inspect the door latch, control panel, main module, water inlet valve, AquaStop system where fitted, power supply, and harness. The symptom alone does not confirm a failed part.
When to Call a Professional
Book service if the safe checks do not solve the problem, a code or symptom returns, or the repair requires meter testing, internal wiring access, appliance removal, or disassembly. Stop immediately for burning odor, sparks, hot wiring, breaker trips, or water near electrical parts.
Related Troubleshooting Guides
Dishwasher not draining, Washer not spinning, and Refrigerator not cooling.
Frequently Asked Questions
Why does it beep but not start?
It may be waiting for a closed door or a lock or delay setting.
Can power reset help?
It may clear a temporary control interruption.
Bottom Line
Start with the safe external checks, follow the guide for your exact model, and avoid guessing at internal components.