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Error code reference

Bosch Oven Error Code E012

Defective user interface PCB temperature sensor.

Bosch codesBosch oven codes
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What the E012 error code actually means

Your Bosch oven is showing E012 because the temperature sensor built into the control panel circuit board has stopped working correctly. This sensor monitors the electronics in the control panel to keep them from overheating. The oven has detected that this sensor is not sending a usable signal, so it has flagged the error to prevent potential damage.

Diagnostic procedure

The full E012 procedure

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of E012

Ranked by how often they cause this code
  1. 1Failed user interface PCB temperature sensor
  2. 2Damaged or corroded wiring harness connector
  3. 3Cracked or cold solder joint on the PCB
  4. 4Faulty main control board misreading the sensor signal

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Questions people ask about E012

What does E012 mean on a Bosch oven?
E012 on a Bosch oven indicates a defective temperature sensor on the user interface PCB. This sensor monitors the temperature of the control panel electronics rather than the oven cavity. The oven's control system has detected that this sensor is providing an invalid or absent signal. The fault points to the interface board, its wiring, or the sensor component itself.
Is it safe to use my Bosch oven while E012 is displayed?
Operating the oven with an active E012 fault is not recommended. The user interface PCB temperature sensor is part of the thermal protection system for the control electronics. Without a functioning sensor, the oven cannot properly monitor or protect those components from heat-related damage, which could lead to further failures or unsafe conditions.
Will resetting my Bosch oven clear the E012 error code?
A power reset by turning off the oven at the circuit breaker for several minutes may temporarily clear E012 if the fault was caused by a transient signal issue. However, if the user interface PCB temperature sensor is genuinely defective or the wiring is damaged, the error will return once the oven restarts and runs its diagnostic checks. A persistent E012 code requires physical inspection and repair rather than repeated resets.
Can I fix E012 on my Bosch oven myself?
A knowledgeable DIYer can start by checking the wiring harness connectors between the interface PCB and the main control board for damage, corrosion, or loose pins. If the wiring checks out, resolving E012 typically requires replacing the user interface PCB, which is a more advanced repair involving disassembly of the control panel area. If you are not comfortable working with electronic components and disconnecting power safely, professional service is recommended.
How much does it cost to repair a Bosch oven showing E012?
Repair costs depend on whether the issue is a simple wiring fix or requires a full user interface PCB replacement. A wiring or connector repair may cost relatively little beyond a service call fee, typically in the range of $75 to $150 for labor alone. If a new interface PCB is required, parts and labor combined can range from $200 to $500 or more depending on the specific Bosch model and local labor rates.

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