What E101 Means
E101 means the cavity temperature sensor has gone open circuit, which Bosch attributes to the sensor being disconnected or to a faulty connection. The response written into the oven is worth knowing: the cooling fan goes to high speed and heating stops. Bosch also notes that heating resumes and the error clears by itself once two consecutive temperature readings are made successfully. On double ovens, codes beginning E1 refer to the single or upper cavity.
Common Causes of E101
- Temperature sensor probe failed open
- Sensor connector unplugged or corroded
- Break in the wiring between the sensor and the control module
🔧 One Safe Check You Can Try
Cut power at the breaker for two minutes to see whether the fault is intermittent. If the oven heats again and the code returns later, that pattern points at a connection that is making and breaking rather than a sensor that has simply died.
⚠ Why You Shouldn't Go Further Than That
- Bosch's test is a resistance measurement compared against a published value, and the conclusion drawn from it decides between a cheap sensor and an expensive control module.
- The sensor connector sits at the rear of the cavity behind the oven, reached by drawing the appliance out of its cabinet.
- The probe passes through the cavity wall into the insulation, and disturbing that insulation changes how the oven holds heat.
- A probe reinstalled at a different depth reads a different temperature even when the part is new and perfect.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.