VERIFIED
E0103 narrows attention to main control-board relay fault on the applicable Bosch dishwasher platform. Keep the full model number with the code for accurate diagnosis.
A Bosch dishwasher showing E0103 is reporting a condition associated with main control-board relay fault. Use the code as a starting point, then pair it with the full model/E-Nr and the way the appliance behaves.
The guidance below stays at the owner-safe level: observe the symptom, check only accessible items supported by the model documentation, and stop before opening protected electrical, water, gas, or mechanical systems.
At a glance
- Code: E0103
- Appliance: Bosch Dishwasher
- Verified meaning: main control-board relay fault
- Diagnostic direction: the electronic control system
- Service area context: San Francisco; confirm coverage by ZIP code
How to read this warning
The technical anchor for E0103 is main control-board relay fault. That description should remain unchanged when the page is imported. What can vary is the hardware behind the condition, so the model/E-Nr and the observed behavior are necessary context.
For this reason, E0103 should be used to narrow the troubleshooting path toward the electronic control system, not as automatic proof that one specific component has failed.
Symptoms that add diagnostic context
Before changing settings or cycling power, note what the appliance is doing. Useful observations include:
- The dishwasher might stop before a cycle finishes.
- Controls can respond inconsistently.
- The warning can reappear shortly after power is restored.
- Normal wash functions might be unavailable.
Where diagnosis may need to look
- Main control-board circuit fault.
- Relay or switching fault within the control path.
- Wiring or connected-load condition that the board detects.
Safe checks before service
- Photograph or write down the exact code before resetting anything.
- If there is no burning smell, visible damage, or repeated breaker trip, switch the dishwasher off at the breaker for about 30 seconds as Bosch directs, then restore power once.
- Avoid remove the control module or probe internal wiring as a homeowner check.
These steps are meant to gather useful information without exposing live wiring, bypassing an interlock, defeating a leak-protection device, or opening a system the owner documentation does not designate for user access.
Safety stop conditions
Leave the appliance off if there is a burning smell, smoke, sparking, or a breaker that trips again.
What service needs to determine
If the warning comes back after the single power reset, the control circuit needs model-specific electrical diagnosis. Repeated resets do not identify which relay, board circuit, connection, or load created the fault. When requesting service, include the complete Bosch model/E-Nr. Similar-looking dishwashers can use different controls, pumps, drying systems, and diagnostic logic.
A useful service request includes the exact display, what the appliance was doing immediately before the warning, and which external checks were already completed.
Before parts or service are selected
Use the complete Bosch model/E-Nr when matching E0103 to technical documentation. Similar-looking products can use different sensors, controls, pumps, motors, or diagnostic logic.
FAQ
For the source record used here, E0103 is associated with main control-board relay fault. The complete model/E-Nr still matters because Bosch can use different hardware and diagnostic logic across product families.
Do not continue if the warning is accompanied by the stop conditions listed above. Water near electrical parts, leaking, smoke, a burning odor, sparking, or repeated breaker trips are reasons to leave the appliance off and arrange service.
Where the Bosch documentation for the exact model allows a normal power reset, use it once after recording the code. A returning warning means the underlying condition still needs attention; repeated resets are not a repair.
Not necessarily. An error code narrows the detected condition or system. The model number, symptoms, and model-specific testing are still needed before selecting a component.
Have the full Bosch model/E-Nr, the exact E0103 display, the cycle stage or operating state when it appears, the visible symptoms, and the safe checks already completed.
Bosch service in the San Francisco area
Does Bosch dishwasher code E0103 keep returning?
If E0103 remains active or returns, request Bosch dishwasher diagnosis for the San Francisco service area. Include the complete model/E-Nr, the exact code, a short symptom description, and your ZIP code so service coverage can be confirmed.
Model compatibility: Bosch reuses codes across series and model years, so Bosch Dishwasher E0103 Error Code may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.