A Bertazzoni dishwasher raising F12 deserves a calm read of a possible heating-related problem clues — not a rush to open sealed or live panels. Bertazzoni Appliance Repair can verify on site.
Reviewed by Marco Bellini · Last reviewed August 12, 2026
Written by
Marco Bellini Appliance Repair Content SpecialistPublished August 10, 2026Technically reviewed August 12, 2026
Content status:
Needs Technical Review — this entry is awaiting technical verification and should be confirmed before it is relied upon.
Error codeF12
ApplianceDishwasher
Affected model seriesSelect Bertazzoni electronic-control appliances (verify the code map for yours)
Quick answer
Seeing F12? On many Bertazzoni dishwasher units it relates to a heating issue. Capture the model plate before resetting.
Model compatibility: Bertazzoni reuses codes across series and model years, so F12 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Bertazzoni dishwasher controls may raise F12 when a possible heating-related problem is involved. Record the full model number; the same characters can map differently across years. Treat this as independent homeowner guidance from Bertazzoni Appliance Repair, not a substitute for model-specific service literature.
Signs
Symptoms you may notice
The dishwasher shows F12 and results are cold or under-heated
The cycle runs longer than usual before F12 appears
Heating seems weak or absent when F12 is shown
Why it happens
Possible causes
A heating element or its relay
A control or sensor affecting heating
Limescale or wear reducing heat on some models
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
Confirm the appliance has power at the outlet
Allow the appliance to cool fully before any check
Perform a manufacturer-approved restart
Write down when F12 appeared and which cycle or mode was running
Important safety warning. Do not open internal panels, access high-voltage wiring, or bypass any safety device. If you see smoke, sparks, a burning smell, or water near electrical parts, switch the appliance off at the outlet if it is safe to do so and call a professional.
Please avoid
What not to attempt
Do not open internal panels or access high-voltage components
Do not bypass door locks, safety switches or interlocks
Do not keep running the appliance if there is water near electrical parts, a burning smell or sparks
Get help
When to call a technician
F12 that survives basic checks belongs with independent service. Bertazzoni Appliance Repair verifies the cause against your model documentation first.
Seeing this code on your Bertazzoni appliance?
Book a specialist visit for a clear estimate and approval before any repair. Independent service — not an official Bertazzoni service center.
Clearing the display is fine once notes are saved — it is not a repair. When F12 comes back on the next use, contact Bertazzoni Appliance Repair.
If two manuals disagree about F12, trust the literature for your exact model — then book independent help if the fault continues.
No. Bertazzoni Appliance Repair publishes independent repair guidance for homeowners. Use your Bertazzoni model manual for manufacturer wording, then book an independent technician if the fault continues.
References
Sources & references
Model-specific Bertazzoni manual — confirm the exact code wording
