Bosch · Oven Serious

E202 — Internal Control Fault

Bosch's official US oven/microwave error-code page documents only E11 (touch keys/condensation) plus generic 'E and a number' catch-alls that instruct disconnecting power and calling Bosch support. A specific 'E202' is not separately documented. The 'internal control fault' explanation below is not confirmed on Bosch's US consumer page — verify against your model's manual.

Keep using it?
Limited use only
DIY difficulty
Hard

How to fix it

  1. Power off at the breaker for 10 minutes; restore and retry once — a soft fault may clear.
  2. Remove the rear panel and visually inspect the main control for burn marks or bulged capacitors.
  3. Verify supply voltage to the board is in spec (240 V across the heater feed legs).
  4. If E202 returns at every power-up, the main control needs replacement.
  5. Confirm part number against the model tag — Bosch boards are NOT cross-compatible across series.

Why it happens

Typical signs: Oven won't heat at all · E202 on power-up or after a few seconds · Display otherwise normal · Sometimes paired with burned smell at control

  • Failed relay or relay driver Power surge or age killed the heating relay.
  • Corrupted EEPROM Brownout during a write left config invalid.
  • Burned PCB trace Often visible at the relay or terminal area.
  • Failed power supply on the board Logic rail collapsing under load.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Bosch oven main control board Common replacement
    Amazon →

More Bosch oven codes

E005 E005 — Power Supply / Line Voltage Fault E011 E011 — Continuous Key Press Detected E0111 E0111 — Stuck Control Button E0511 E0511 — Cooling Fan Fault E0527 E0527 — Door Switch Fault E0531 E0531 — Convection Fan Fault

All Bosch codes → All oven codes →

Frequently asked questions

What does the E202 code mean on a Bosch oven?

Bosch's official US oven/microwave error-code page documents only E11 (touch keys/condensation) plus generic 'E and a number' catch-alls that instruct disconnecting power and calling Bosch support. A specific 'E202' is not separately documented. The 'internal control fault' explanation below is not confirmed on Bosch's US consumer page — verify against your model's manual.

What causes the E202 code on a Bosch oven?

Failed relay or relay driver: Power surge or age killed the heating relay. Corrupted EEPROM: Brownout during a write left config invalid. Burned PCB trace: Often visible at the relay or terminal area.

Is it safe to keep using a Bosch oven with a E202 error?

Limited use only. This is rated a serious-severity fault.

How do I fix E202 on a Bosch oven?

Power off at the breaker for 10 minutes; restore and retry once — a soft fault may clear. Remove the rear panel and visually inspect the main control for burn marks or bulged capacitors. Verify supply voltage to the board is in spec (240 V across the heater feed legs).

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.