VERIFIED
Bosch range ER23 is associated with electric-cooktop PWM frequency outside the allowed range. Review symptoms, model details, and safe external checks before deciding on the next step.
When a Bosch range displays ER23, the control has registered electric-cooktop PWM frequency outside the allowed range. That narrows attention toward the electronic control path, but the model/E-Nr and visible symptoms are still necessary before the warning is treated as a parts diagnosis.
The guidance below remains at the owner-safe level. It focuses on recording the condition and checking accessible items without opening protected electrical, water, gas, refrigeration, or mechanical systems.
At a glance
- Code: ER23
- Appliance: Bosch Range
- Verified meaning: electric-cooktop PWM frequency outside the allowed range
- 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 ER23 is electric-cooktop PWM frequency outside the allowed range. Preserve that meaning in the factual layer. The warning points the diagnostic path toward the electronic control path, while the exact model and symptom pattern determine how that information should be applied.
Symptoms worth recording
Before changing settings or cycling power, note the behavior you can see or hear:
- The appliance can stop or limit a function.
- The code may come back under the same operating condition.
- One feature can fail while others remain available.
- The exact behavior can vary between model generations.
Possible causes
The source record supports considering the following possibilities without treating any single one as confirmed:
- A model-specific control or component fault.
- Wiring or sensing outside the expected state.
- A configuration or installation condition.
- A subsystem failure that must be matched to the exact model.
First steps that stay outside the appliance
- Write down the code exactly, including punctuation and leading zeroes.
- Write down the full model/E-Nr and the operating stage where the warning appeared.
- Follow only normal owner-manual checks and one approved reset where applicable.
These checks are intended to gather useful information without exposing live wiring, bypassing an interlock, defeating a leak-protection device, opening a sealed system, or using undocumented service modes.
When to stop using the appliance
Leave the appliance off for leaking, smoke, burning odor, gas odor, sparking, severe overheating, or repeated breaker trips.
When diagnosis becomes the next step
If the same warning reappears, use the exact model documentation to narrow the subsystem before any part is ordered. The useful service history includes when the code appears, whether it is repeatable, and what changed immediately before it.
For a service request, include what the appliance was doing immediately before the warning and which external checks were already completed.
Why the full Bosch model/E-Nr matters
Bosch can reuse similar display characters across different range generations. Confirm the full model/E-Nr before applying platform-specific repair information.
FAQ
For this record, ER23 is associated with electric-cooktop PWM frequency outside the allowed range. 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 code 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 ER23 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 ER23 on your Bosch range?
If ER23 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 ER23 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.