Step-by-Step DIY Fix Guide
- SAFETY: Do not open the oven door immediately — the cavity temperature may be dangerously high. Let it cool with the door closed.
- After 30 minutes, carefully open the door and check for any food spills or signs of burning inside the cavity.
- Clean any grease or food residue from the oven floor and walls.
- Check that the oven vent (usually above the rear burners) is not blocked.
- Disconnect power at the circuit breaker for 60 seconds, then restore.
- Run the oven at a low temperature (300°F) to test — if E100 returns immediately, call a technician.
If the warning comes back after restart
- If airflow still seems weak after the basic checks, the fan path or a deeper obstruction becomes more likely.
- If the warning returns immediately after a clean restart, the sensor or wiring path becomes more likely than a one-time glitch.
- E100 returns immediately after a power reset with no visible cause (no spills, vent clear)
What This Error Means
Error E100 on your Bosch range means: The oven cavity temperature exceeded the safe maximum limit and the safety shutoff has stopped the heating elements to prevent damage or fire. The appliance's self-diagnostic system has flagged this condition and may have disabled the affected zone or function to prevent damage or unsafe operation.
The most frequent cause is faulty temperature sensor reporting incorrect (low) readings, causing the oven to overheat. Work through the causes and fix steps below in order — starting with the simplest check.
Some cases of E100 can be partially addressed by the homeowner. The steps below cover the DIY checks — if they do not resolve the condition, a technician is needed.
When an overtemperature condition triggers, the appliance is protecting itself and your kitchen. Always allow the appliance to cool fully before investigating — internal surfaces can remain dangerously hot for 30 minutes or more after the heating elements switch off.
Most Likely Cause by Symptom
The Bosch range may stop, pause, or refuse to complete the cycle normally.
Likely cause: Faulty temperature sensor reporting incorrect (low) readings, causing the oven to overheat
Check first: SAFETY: Do not open the oven door immediately — the cavity temperature may be dangerously high. Let it cool with the door closed.
The warning may return immediately because the appliance is detecting an internal fault.
Likely cause: Failed oven thermostat or temperature regulator allowing continuous heating
Check first: After 30 minutes, carefully open the door and check for any food spills or signs of burning inside the cavity.
Common Causes
- Faulty temperature sensor reporting incorrect (low) readings, causing the oven to overheat
- Failed oven thermostat or temperature regulator allowing continuous heating
- Food residue or grease fire inside the oven cavity causing a temperature spike
- Obstructed oven vent preventing heat from escaping properly
What Not to Do
- Do not open the oven door the moment E100 appears — let the cavity cool before inspecting
- Do not continue using the oven if E100 recurs — a malfunctioning temperature regulator is a fire risk
Model and Display Variation Notes
Model-family notes
- Bosch range display wording and code formats can vary by series.
- If your model behaves differently, check the owner manual before trying any deeper maintenance step.
Display and panel differences
- Panel wording can vary by series, so confirm the exact code pattern before buying parts.
Parts, Tools and Service Options
Common parts
- Oven NTC temperature sensor ($20–$50)
- Oven thermostat ($30–$80)
- Oven control board ($100–$250)
Manual and model check
Check your exact model and manual before ordering any Bosch range parts.
Service option
Bosch service visit if the warning returns after the basic checks are complete.
Suggestions in this section are organized to support the troubleshooting flow first. Any future affiliate relationships should be disclosed clearly.
When Not to Keep Troubleshooting
E100 returns immediately after a power reset with no visible cause (no spills, vent clear)
- Oven temperature feels inconsistent or overcooked food despite normal settings
How to Prevent It Recurring
- Always use the oven with the provided rack in place — bare metal walls concentrate heat and can spike temperatures
- Clean oven spills promptly — accumulated grease can ignite and cause temperature spikes that trigger E100
Related Error Codes
E011
The oven's temperature sensor (NTC probe) has an open-circuit fault or has failed, preventing the range from accurately measuring oven cavity temperature.
E101
The oven's cooling fan has stopped working or is running below the required speed, preventing proper cooling of the control electronics and oven exterior.
ERR / toP
The range has detected an oven temperature error (ERR) or an overtemperature condition (toP — the oven is too hot). Both conditions trigger a safety shutoff.
Extra notes
- This page is based on Bosch support material and stays conservative where model-specific guidance may vary.
- The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.
Source and model notes
Last reviewed: 2026-04-07
Based on: Based on Bosch support material and edited into consumer-safe guidance for the exact code family on this page.
Model coverage note: Bosch range code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.
Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.
Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.