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Error code reference
Bosch Oven Error Code F121
Stuck keyboard key; bad display head or bad keyboard.
SourceBosch HBL/HBN 7 - Service Manual: Fault Codes & Troubleshootingp. 8
Diagnostic procedure
The full F121 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check all connections between the display head (P5) and the keyboard (J1).
SourceBosch HBL/HBN 7 - Service Manual: Fault Codes & Troubleshootingp. 8
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
3 manuals in the MyPros+ library document this code for Bosch oven.
Models covered by the manuals that document this code
- HBL7
- HBL73
- HBL7376
- HBL74
- HBL742AUC
- HBL742AUC(FD8207)
- HBL742AUC/01
- HBL742AUC/02
- HBL745AUC
- HBL745AUC(FD8207)
- HBL745AUC/01
- HBL745AUC/02
- HBL745AUC/03
- HBL746AUC
- HBL746AUC(FD8207)
- HBL746AUC/01
- HBL746AUC/02
- HBL75
- HBL752AUC(FD8207)
- HBL752AUC/00
- HBL752AUC/01
- HBL752AUC/02
- HBL755AUC
- HBL755AUC(FD8207)
More models are covered than are listed here.
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