VERIFIED
Bosch range ER26 is linked with electric-cooktop relay supply voltage too high in the off state. Review the visible symptoms, model details, and safe external checks before deciding on the next step.
A Bosch range showing ER26 has detected a condition tied to electric-cooktop relay supply voltage too high in the off state. The code helps narrow the system involved, but it does not by itself prove which component has failed.
Start with external observations and manufacturer-approved owner checks only. If the code persists, move to model-specific diagnosis rather than repeated resets or speculative part replacement.
At a glance
- Code: ER26
- Appliance: Bosch Range
- Verified meaning: electric-cooktop relay supply voltage too high in the off state
- Primary diagnostic direction: the electronic control path
- Service-area context: San Francisco; confirm coverage by ZIP code
Technical meaning of the code
The verified technical anchor for ER26 is electric-cooktop relay supply voltage too high in the off state. 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.
What you may notice
Before changing settings or cycling power, record the behavior you can see or hear:
- The appliance may fail to start normally.
- A cycle may reset or stop.
- Other controls can behave intermittently.
- The code may appear after a supply interruption.
Systems and conditions to consider
The source record supports considering the following possibilities without treating any single one as confirmed:
- Incoming voltage outside the expected range.
- A loose or damaged electrical connection.
- An internal power-supply or conversion fault.
- A control board detecting unstable power.
Checks to make before service
- Write down whether other household lights or appliances are behaving abnormally.
- Reset a tripped breaker only once and only when there is no sign of damage.
- Avoid measure or modify household wiring unless you are qualified to perform electrical work.
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.
Leave the appliance off if
Leave the appliance off for repeated breaker trips, sparking, burning odor, or visible wiring damage.
If the warning returns
If ER26 remains active or comes back after the permitted external checks, the next step is model-specific testing of the system associated with electric-cooktop relay supply voltage too high in the off state. Repeated resets or parts guessing do not identify the actual failure path.
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
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, ER26 is associated with electric-cooktop relay supply voltage too high in the off state. 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 ER26 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
Ready to have ER26?
If ER26 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.
service notice: This site represents an appliance repair service and is not affiliated with or endorsed by Bosch.
Technical source: https://mypros.plus/error-codes/bosch/range
Model compatibility: Bosch reuses codes across series and model years, so ER26 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.