E01
Bosch Oven
Severity: CriticalWhat Does This Error Mean?
E01 on a Bosch oven means the cavity temperature sensor (NTC thermistor) has a short circuit. The sensor is reading an impossibly high temperature, so the oven's control board has shut down as a safety measure. The oven will not heat until the sensor is repaired or replaced.
Affected Models
- Bosch HBG Series
- Bosch HBA Series
- Bosch Series 2, 4, 6 and 8 Built-In Ovens
- Bosch HBN Series
- Bosch Serie 4 HB577GBS0B
Common Causes
- Temperature sensor has short-circuited — the sensor wiring has shorted against the oven cavity metal
- Sensor probe damaged by physical impact or an oven cleaning product
- Sensor connector corroded or contaminated — grease or food residue causing a false short
- Control board fault causing it to misread a valid sensor signal as a short circuit
How to Fix It
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Switch the oven off at the wall and leave it unpowered for 5 minutes.
Restart and check whether E01 clears. A transient sensor error may resolve with a power cycle — if E01 returns, the fault is genuine.
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Clean inside the oven — pay particular attention to the area around the temperature sensor probe.
The sensor probe is typically a small metal rod visible on the back wall of the oven cavity. Grease or food debris on the probe or at its base can cause false readings. Clean with a damp cloth when the oven is completely cool.
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Do not use harsh oven cleaners directly on or near the sensor probe.
Chemical oven cleaners can damage sensor coatings and cause resistance drift or short circuits.
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If E01 persists after cleaning and a reset, call Bosch service for sensor replacement.
A technician will test sensor resistance (typically 1,000 ohms at room temperature for NTC sensors) and replace the sensor if it is outside specification.
When to Call a Professional
E01 requires a technician to test sensor resistance and wiring. The temperature sensor is inside the oven cavity and involves working near mains-voltage wiring. Contact Bosch on 0344 892 8979 (UK) or visit bosch-home.com to book a service visit.
Frequently Asked Questions
Where is the temperature sensor in a Bosch oven?
The temperature sensor is a thin metal probe, usually visible on the back wall of the oven cavity. On most Bosch models it is positioned in the upper-rear section of the cavity. It connects to wiring that runs through the oven wall to the control board.
How much does a Bosch oven temperature sensor cost?
A replacement Bosch oven NTC temperature sensor typically costs £15–40 or $20–50 for the part. With technician labour, total repair cost is usually £80–160 or $100–200.