Bosch Oven Error E10 — What It Means & How to Fix It

What Does This Error Mean?

E10 on a Bosch oven means the oven has detected an issue with its mains power supply. This could be a voltage that is too high or too low, a wiring fault in the oven's power circuit, or an issue with the household supply itself. The oven shuts down to protect its electronics from power damage.

Affected Models

Bosch HBG Series
Bosch HBA Series
Bosch Series 4, 6 and 8 Built-In Ovens
Bosch HBN Series
Bosch HBS573BS0B

Common Causes

Mains voltage fluctuation — a brief under or over-voltage event in the household supply
Loose terminal connection in the oven's mains cable or terminal block
Fuse or circuit breaker for the oven circuit has partially tripped — delivering unstable power
Power cut or brownout that caused the control board to register a supply fault
Internal power supply board fault on the oven — not related to the household supply

How to Fix It

Switch the oven off at the wall for 5 minutes, then restore power.

E10 caused by a brief mains fluctuation (during a storm, power dip, or surge) will often clear after a reset. If E10 does not return, no further action is needed.
Check the oven's circuit breaker or fuse in your consumer unit (fuse box).

A partially tripped breaker can deliver unstable voltage. Switch it fully off, then fully on. If the breaker keeps tripping, call an electrician.
Check whether other appliances in the kitchen are working normally.

If the fridge, microwave, or other devices are also behaving oddly, the household mains supply is the issue — contact your electricity supplier or an electrician.
If E10 persists with a stable power supply, call Bosch service.

A technician will check the oven's mains terminal block and internal power supply board for loose connections or component failure.

When to Call a Professional

E10 that returns after a reset requires a qualified electrician or appliance technician. Mains wiring inside the oven terminal block is high voltage — never open the back panel yourself. If other appliances on the same circuit are also behaving erratically, contact an electrician about the household supply.

Frequently Asked Questions

Can a power surge cause permanent damage to my Bosch oven?

Yes — a strong power surge can damage the control board or internal power supply even if E10 clears after a reset. If you noticed a significant surge or outage before E10 appeared, have the oven checked even if it seems to be working. A damaged control board may fail weeks later rather than immediately.

Should my Bosch oven be on a dedicated circuit?

Yes — Bosch recommends that built-in ovens are connected to a dedicated 13A or 16A circuit with their own circuit breaker. Sharing a circuit with other high-draw appliances can cause voltage dips that trigger E10. If your oven is not on a dedicated circuit, an electrician can add one.