Error code
Bosch error code F8
Bosch error code F8: a zone was left running without any control being touched, and the automatic time limit switched it off. What the code covers, what to check first, and what it does not tell you — on cooktops & rangetops and ranges.
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What we can confirm
Code F8, from the manufacturer's own documentation
A code is only meaningful together with the machine showing it — the same digits mean different things on different equipment.
The code
F8
A zone was left running without any control being touched, and the automatic time limit switched it off
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What it narrows down to
Automatic time limit
What you are probably seeing
Diagnostic
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What it looks like from the kitchen
The symptom this code usually arrives with
A code names the subsystem; the symptom is what sent you to look at the display in the first place. That page says what it usually turns out to be, cheapest cause first.
-
Usually protection working Cooktop zone switching itself off
A zone that cuts out under load, or a cooktop that shuts down after a while at high power. Almost every version of this is a protection doing its job, and each one has a published code that says which.
- Cuts out after twenty minutes on high
- All zones off at once
- Comes back after it cools
On the same appliance
What else belongs to the cooktops & rangetops
On this make a code belongs to the appliance rather than to a product line. These are the other conditions this machine can display, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this appliance can display
Supply voltage
Wired incorrectly
Zone overheated
Electronics overheated
Hot pan on the panel
Demo mode
Connection lost
Panel wet or covered
Controls locked
Self-maintenance
No power
General electronics
The same digits mean different things on different equipment. Search the full code list
In more detail
About Bosch error code F8
What this one means
A zone was left running without any control being touched, and the automatic time limit switched it off.
The other ways your machine may say it
The same condition is published under more than one label, because it has been carried across generations of this appliance:
- F8 with H or h and the zones not heating — how a model with no digital display says it. On that machine, the lights are the code
What the code covers
A published cause names a circuit rather than a component, which is the single most useful thing to know before ordering a part. This one covers:
- The safety timer
What to try yourself
- Touch any control on the surface
- Set the zone again and carry on
Then what
A deliberate safety feature rather than a problem, and the time allowed is longer at low power than at high. It exists because a hob left on and forgotten is one of the more dangerous things in a kitchen.
This code is published for cooktops & rangetops and ranges. The full list of codes has the rest.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards