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Error code · Oven

The Control Board’s Own Heat Sensor Died (Bosch Oven E312)

The control module has a built-in temperature sensor whose job is to protect the board from the cavity's heat. When E312 appears, that sensor has failed, and the oven has no way of knowing whether the…

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Code
E312
Appliance
Oven
Brand
Bosch
Warranty
30-day workmanship

What E312 means

The control module has a built-in temperature sensor whose job is to protect the board from the cavity's heat. When E312 appears, that sensor has failed, and the oven has no way of knowing whether the area around the board is getting too hot. Bosch's reaction is drastic and simple: every oven function is suspended until a control reset, and the recommended repair is a new control module.

Common causes of E312

  • Heat sensor on the board burned out
  • Cracked solder joints or traces around the sensor after years of heating and cooling
  • Control module simply worn out with age
✓ One safe check you can try

1. Switch the breaker off for two minutes; that is the reset the manual mentions. 2. Switch it back on. 3. If the oven runs a while and then shuts down again, the sensor really is dying and a new board is the answer on record. 4. Do not keep restarting it.

! Why to stop there
  • Running an oven that cannot monitor its own board temperature risks heat damage to the electronics.
  • The sensor is soldered to the board, so there is no separate part to swap at home.
  • Repeated restarts only delay a repair that will be needed anyway.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
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Other Oven codes

E223Lower Probe Reads Colder Than Allowed (Bosch Oven E223) E226Bosch Oven E226 After the Lower Door Latch Signal Is Lost E309Control Module Failed Its Program Memory Check: Bosch Oven E309 E310Bosch Oven E310 Signals a Settings Memory Failure on the Control Module E314Bosch Oven E314 When the Cancel or Off Key Reads Stuck E414Off Key Failure Logged Behind the Scenes, Bosch Oven E414 E201Bosch Oven E201 on a Double Wall Model, Lower Cavity Sensor Reads Open E204Lower Sensor Wire Touching Metal: Bosch Oven E204 on Double Ovens
E312E312 questions
Can the sensor be replaced alone?

The documented repair is a new control module, because the sensor is part of the board. We confirm the diagnosis and quote the full job in writing.

Why did the whole oven shut down?

Without its board sensor the control cannot protect the electronics, so it suspends all functions. That is a deliberate safeguard against heat damage, even though it feels abrupt.

Is it safe to use after a reset?

We do not recommend it. The protection is gone, so a hot day or long bake could overheat the board. Please leave it off until it is inspected.

Book a visit

Still seeing E312?

A technician diagnoses it on site and gives you the price in writing before any work starts.

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