VERIFIED
Bosch range ER3 is linked with electric-cooktop key-selection fault. Review the visible symptoms, model details, and safe external checks before deciding on the next step.
When a Bosch range displays ER3, the control has registered electric-cooktop key-selection fault. That directs attention toward the electronic control path, but the exact model/E-Nr and symptom pattern are still needed before choosing a repair path.
Treat the warning as evidence, not a complete repair instruction. Do not bypass interlocks, leak protection, electrical safeguards, or sealed systems just to clear the display.
At a glance
- Code: ER3
- Appliance: Bosch Range
- Verified meaning: electric-cooktop key-selection fault
- Primary diagnostic direction: the electronic control path
- Service-area context: San Francisco; confirm coverage by ZIP code
What the warning means
The verified technical anchor for ER3 is electric-cooktop key-selection fault. Preserve that meaning in the factual layer. The warning narrows the diagnostic path toward the electronic control path, while the exact model and symptom sequence determine how that information should be applied.
Symptoms worth recording
Before changing settings or cycling power, record the behavior you can see or hear:
- Controls may be unresponsive or inconsistent.
- The appliance may halt before completing the selected function.
- A code may reappear immediately after startup.
- One feature may fail while others remain available.
Possible causes
The source record supports considering the following possibilities without treating any single one as confirmed:
- An internal control-board fault.
- Memory or configuration data outside the expected state.
- A relay or electronic switching fault.
- Wiring, supply, or a connected load affecting the control.
First steps that stay outside the appliance
- Write down the exact display and full model number.
- Keep the control surface clean and dry where touch controls are involved.
- Follow one normal manufacturer-approved power reset when there is no sign of electrical damage.
- Avoid replace a control board from the code alone.
These checks are for information gathering only. Do not expose live wiring, bypass an interlock, defeat leak protection, open a sealed refrigeration circuit, or use undocumented service-mode procedures.
When to stop using the appliance
Stop immediately for smoke, burning odor, sparking, visible electrical damage, or repeated breaker trips.
When diagnosis becomes the next step
If the warning comes back, the control board, connected loads, wiring, supply, and configuration need platform-specific testing. Do not choose the most expensive module from the code alone. The technician should verify the relevant circuit or mechanism before recommending a repair.
For a service request, include what the appliance was doing immediately before the warning and which safe checks were already completed.
Why the full Bosch model/E-Nr matters
Record the complete model/E-Nr with ER3. That identifier helps separate platforms that may use different controls, sensors, or service logic.
FAQ
For this record, ER3 is associated with electric-cooktop key-selection fault. The exact model/E-Nr still matters because Bosch can use different hardware and diagnostic logic across product families.
Only if no safety stop condition is present and the appliance is otherwise operating safely. If the warning repeats, performance is abnormal, or there is leaking, smoke, electrical odor, sparking, overheating, or repeated breaker trips, leave the appliance off.
Use only a normal reset that Bosch documents for the exact model. If the warning returns, repeated resets are not a substitute for diagnosis.
No. The code identifies a detected system condition. Model information, symptoms, and model-specific testing are still needed before a component is selected.
Have the full Bosch model/E-Nr, the exact ER3 display, the cycle stage or operating state where it appears, the visible symptoms, and the external checks already completed.
Bosch service in the San Francisco area
Still seeing ER3?
If ER3 remains active or comes back, request Bosch range diagnosis for the San Francisco service area. Include the complete model/E-Nr, exact code, symptom summary, and ZIP code so service coverage can be confirmed.
Model compatibility: Bosch reuses codes across series and model years, so ER3 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.