Bosch Oven E1 error code
E1 points to the oven's control electronics. On most BSH-built ovens it is an EEPROM (control memory) error; on some wall-oven controls it is reported as a general control board problem.
Also shown as: E1, E:1
Last updated: October 6, 2026
What causes the E1 error?
- Failed main electronic control board
- Corrupted EEPROM memory from a power surge
- Loose wiring to the control board
- Moisture damage in the control housing
- Aging board components failing the self-check
How to fix Bosch E1 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Power reset at the breaker
Turn off the breaker for at least one minute, then restore power. Do not touch any keys for a full minute after power returns. This clears memory glitches.Safety warning: Early key presses after power-up can re-trigger control errors. - Check for a recent power event
If E1 appeared after a storm or outage, a surge is the likely cause. A surge protector on the range circuit helps prevent repeats. - Let a damp control dry
If steam or a boil-over reached the control area, leave the breaker off for several hours so moisture can evaporate, then retry. - Replace the control board
If E1 returns after a proper reset, the board has failed its self-check and needs replacement by a technician.Safety warning: Oven controls carry live voltage. Board replacement is a technician job.
When to call a technician
- E1 returns after the power reset
- The oven is completely unresponsive
- You see corrosion or moisture in the control area
- The oven is under warranty
Frequently asked questions
What is an EEPROM error?
EEPROM is the chip that stores the oven's settings and calibration. If the control cannot read it reliably, it shows E1 and refuses to run.
Can the oven still be used with E1?
No. The control blocks operation because it cannot trust its own programming.
Does E1 mean the same on every Bosch oven?
The core meaning — control electronics fault — is the same. The exact sub-description (memory error vs. board problem) varies slightly by control family.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.