Error code
Thermador oven error code E104
Thermador error code E104: the cavity temperature sensor reads as a short circuit — E104 for the upper cavity, E204 for the lower one. 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 E104, 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
E104
The cavity temperature sensor reads as a short circuit — E104 for the upper cavity, E204 for the lower one
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What it narrows down to
Cavity sensor shorted
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 E104
What this one means
The cavity temperature sensor reads as a short circuit — E104 for the upper cavity, E204 for the lower one. 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 two labels are the two cavities of a double or triple oven, not two ages of machine — E1xx is the upper cavity and E2xx the lower, and the number tells you which one to look at:
- E104, E204
- Three LEDs on the panel blinking out the digits 1, 0 and 4 — 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 cavity temperature sensor
- A chafed harness shorting against the cabinet
- The plug at the control module
Worth doing before you call
- Note whether the oven ran hot before it stopped — a shorted sensor reads cold to the control, which then keeps heating
Then what
This is the twin of the open-circuit code and is tested the same way, from the plug at the control module back to the sensor.
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