Bosch Oven E2 Error Code: Causes and Fixes
Quick answer: Cooling fan response low
What you’ll notice
Cooling fan (which cools the control panel during and after cooking) is not responding.
Bosch
Oven
Code E2
low severity
Bosch models: Bosch displays temperatures in Celsius by default; verify the °C/°F setting before diagnosing apparent temperature errors. The temperature probe connects at the rear cavity wall. The PerfectRoast meat probe (sold separately on some models) is a different connector — do not confuse it with the RTD fault sensor.
Common causes
- Cooling fan motor failed
- Fan blade obstructed
- Fan wiring disconnected
Step-by-step fix
- Listen for the cooling fan during a bake cycle — it should run during cooking and for a period after.
- Access the fan (usually behind the back panel or above the oven cavity) and inspect for obstruction.
- Test fan motor continuity.
Tools you may need
Screwdriver setMultimeter
Prevention
- Do not block the top rear vent of the oven.
When to stop DIY
Replace the cooling fan motor — running the oven without it will shorten control board life.
FAQ
What does E2 mean on Bosch oven?
E2 usually indicates: Cooling fan response low.
Can I keep using the appliance with E2?
Use caution. Severity is low. Replace the cooling fan motor — running the oven without it will shorten control board life.
How long does this fix usually take?
Typical first-pass troubleshooting takes 30–45 minutes.