Error code
Thermador oven error code E123
Thermador error code E123: the probe is reporting a temperature below the range it is allowed to report. What the code covers, what to check first, and what it does not tell you — on wall ovens & steam ovens.
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What we can confirm
Code E123, from the manufacturer's own documentation
A code is only meaningful together with the generation showing it — the same two digits mean different things across generations.
The code
E123
The probe is reporting a temperature below the range it is allowed to report
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What it narrows down to
Probe reads too cold
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.
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Measure before you judge Oven runs hot or cold
Baking that has gone wrong at the same setting you have always used. A thermometer in the middle of the oven settles in twenty minutes what an argument about it never will.
- Everything browning too fast, or not at all
- A consistent offset at every setting
- A code in the E1 or E2 hundreds
In more detail
About Thermador oven error code E123
What this one means
The probe is reporting a temperature below the range it is allowed to report. It is a code the manufacturer publishes for this appliance, not one we have worked out — and it is decoded here rather than left as three characters on a display.
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:
- Three LEDs on the panel blinking out the digits 1, 2 and 3 — 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 probe
- The socket in the cavity wall
- The probe module
What to try yourself
- Unplug and replug the probe with the oven cold, seating it fully
- Try a second probe if you have one
Then what
The twin of the too-hot probe code, and it has the same cheap first move: rule out the probe before anyone opens the oven.
This code is published for wall ovens & steam ovens. The full list of codes has the rest of them, searchable, including the labels older and newer machines use for the same conditions.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards