Thermador Oven Error Code E151: How to Fix It

Medium 45-90 minutes High Severity Verified June 2026
Error Code
E151
Brand
Thermador
Product Type
oven
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
45-90 minutes
Thermador oven error code E151 indicates your steam generator is overheating, which is a serious safety issue that requires immediate attention. This error typically occurs when the steam generator's temperature sensor detects excessive heat, triggering an automatic shutdown to prevent damage or injury. Understanding how to troubleshoot this issue can help you determine whether it's a simple fix or requires professional repair.
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Tools You'll Need

How to Fix Error Code E151

  1. Turn Off and Disconnect Power

    Never attempt to service the oven while it's hot or connected to power. The steam generator components can reach extremely high temperatures.
  2. Check Water Reservoir Level

    Only use distilled water in the steam generator to prevent mineral buildup that can cause overheating.
  3. Inspect Water Reservoir for Damage

  4. Clean the Steam Generator

    Ensure the oven is completely cool and disconnected from power before accessing internal components.
  5. Check Temperature Sensor Connections

  6. Reset the System

  7. Test with Steam Function

    Stop using the steam function if any unusual odors, sounds, or error codes appear during testing.

Parts You May Need

Water reservoir
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Steam generator temperature sensor
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Steam generator heating element
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Steam system water lines
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Water reservoir
Check Price on Amazon
Steam generator temperature sensor
Check Price on Amazon
Steam generator heating element
Check Price on Amazon
Steam system water lines
Check Price on Amazon
Water reservoir
Check Price on Amazon
Steam generator temperature sensor
Check Price on Amazon
Steam generator heating element
Check Price on Amazon
Steam system water lines
Check Price on Amazon
Water reservoir
Check Price on Amazon
Steam generator temperature sensor
Check Price on Amazon
Steam generator heating element
Check Price on Amazon
Steam system water lines
Check Price on Amazon
Water reservoir
Check Price on Amazon
Steam generator temperature sensor
Check Price on Amazon
Steam generator heating element
Check Price on Amazon
Steam system water lines
Check Price on Amazon
Water reservoir
Check Price on Amazon
Steam generator temperature sensor
Check Price on Amazon
Steam generator heating element
Check Price on Amazon
Steam system water lines
Check Price on Amazon
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When to Call a Professional

Call a professional technician if the error persists after following all troubleshooting steps, if you find damaged electrical components, if the temperature sensor needs replacement, or if you're uncomfortable working with electrical appliances. This error involves high-temperature components and electrical systems that require specialized knowledge and tools to repair safely.

Frequently Asked Questions

What causes Thermador oven error code E151?
Error code E151 is caused by the steam generator overheating, typically due to low water levels, mineral buildup, blocked steam vents, a faulty temperature sensor, or a malfunctioning heating element in the steam system.
Is it safe to use my Thermador oven with error E151?
No, you should not use your oven when error E151 appears. This indicates dangerous overheating in the steam generator that could cause damage to the appliance or pose a safety risk. Discontinue use immediately until the issue is resolved.
How often should I clean my Thermador steam oven to prevent E151?
Clean your steam oven every 2-3 months or after every 15-20 steam cooking cycles. Use distilled water only, and perform regular descaling according to your owner's manual to prevent mineral buildup that can cause overheating.
Can I reset Thermador error code E151 myself?
You can attempt to reset the error by turning off the oven, waiting 2 hours for cooling, then pressing and holding the cancel button for 10 seconds. However, if the underlying cause isn't addressed, the error will return when you try to use the steam function.
How much does it cost to repair Thermador oven error E151?
Repair costs vary depending on the root cause. Simple issues like cleaning or water reservoir replacement may cost $100-200, while temperature sensor or heating element replacement can range from $300-600 including parts and labor.