Bosch Oven Error Codes
Bosch wall ovens and ranges use E or F codes for temperature, door lock, and touch control faults on HBL and HDI series.
General troubleshooting
Try these checks before opening a specific error code page—they resolve many Bosch oven faults without parts.
- 1Allow the oven to cool completely before self-clean on HBL8453UC
- 2Verify the oven is on a dedicated circuit rated for the nameplate amperage
- 3Clean the door gasket and check the door hinges for smooth closure
- 4Reset by turning off the breaker for five minutes after control errors
- 5Use the temperature offset calibration in the service menu if bake runs hot or cold
Common symptoms
Owners often search for a code after noticing one of these issues on their Bosch oven:
- Error during pyrolytic self-clean when door lock fails
- Temperature inaccurate during European convection bake
- Touch panel unresponsive after steam from cooktop
- Heating element not energizing on bake but broil works
- Cooling fan runs continuously after the oven is off
All Bosch oven error codes
| Code | What it means | Guide |
|---|---|---|
| F31 | Oven temperature sensor short circuitF31 indicates a short circuit in the oven temperature sensor—the PT500 probe in the upper rear cavity sent resistance near zero, so the board disables bake and broil to prevent uncontrolled heating. | View fix → |
| F32 | Open circuit in oven temperature sensorF32 indicates an open break in the oven temperature sensor circuit—the probe or wiring lost continuity, so the control cannot read cavity temperature. On double ovens, F32 often refers to the lower cavity sensor per Bosch service literature. | View fix → |
| F33 | Warming drawer sensor short circuitF33 indicates a short circuit in the warming drawer temperature sensor—the probe that monitors the drawer cavity sent abnormally low resistance, disabling warming drawer heat on models with a separate warming zone below the oven. | View fix → |
| F34 | Open circuit in warming drawer sensorF34 signifies an open break in the warming drawer sensor circuit—the drawer heat zone cannot regulate temperature without a valid probe signal and the display locks warming functions until F34 clears. | View fix → |
| F35 | Upper oven cavity sensor out of rangeF35 on Bosch double-wall ovens indicates the upper cavity temperature sensor failed open or short—similar family to F31/F32 but logged specifically for the upper oven zone on dual-cavity models like the HBL8753UC series. | View fix → |
| F36 | Lower oven temperature sensor shortedF36 indicates a short circuit in the lower oven temperature sensor on dual-cavity Bosch wall ovens—the lower probe circuit read grounded or near-zero resistance, disabling lower bake and broil. | View fix → |
| F37 | Convection cooling fan not runningF37 indicates the convection cooling fan did not start or did not reach expected speed—the fan that moves air past the convection element on European-style Bosch ovens failed self-test, so convection bake and roast modes are disabled. | View fix → |
| F38 | Door lock motor overcurrent during lock attemptF38 logs door lock motor overcurrent—the motorized latch drew excessive current trying to engage, often before self-clean when the lock must secure the door above 900°F operating temperatures. | View fix → |
| F39 | Meat probe sensor short circuitF39 indicates a short circuit in the meat probe input—the jack on the control panel detected low resistance on the probe circuit while probe mode was selected or a probe was inserted. | View fix → |
| F40 | Meat probe open circuit or not detectedF40 indicates a meat probe error—the control selected probe cooking but the jack read an open circuit, as if no probe was inserted or the probe RTD failed internally. | View fix → |
| F41 | Oven door latch will not lockF41 means the upper or single oven motorized latch will not lock—the latch motor ran but switches never confirmed a locked position, so self-clean cannot start. Standard baking may still work on some models. | View fix → |
| F42 | Lower oven door latch will not lockF42 on Bosch double ovens indicates the lower motorized latch will not lock—same failure mode as F41 but for the lower cavity used independently on dual-wall units. | View fix → |
| F43 | Upper latch motor or wiring faultF43 indicates the upper or single oven latch motor or its wiring failed during a lock command—Bosch service literature groups F43 with jammed switches, pinched common wires, and defective latch motors on the power board P24 circuit. | View fix → |
| F44 | Lower latch motor or wiring faultF44 indicates lower oven latch motor or wiring failure on dual-cavity models—the lower lock circuit on P24/P10 did not complete, blocking lower self-clean and sometimes lower bake safety interlocks. | View fix → |
| F45 | Door latch switches stuck or defectiveF45 means the electronic control detected door latch sensor switches stuck or defective—the motor may move but microswitches on the latch assembly do not change state, so the board refuses heat modes that require a confirmed lock or unlock position. | View fix → |
15 codes documented with causes, fixes, and affected models.