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Error code reference

Dacor Oven Error Code U80

Upper/single meat probe shorted

Dacor codesDacor oven codes

Upper/single meat probe shorted - A/D value above 0XF0 registered for 60 continuous seconds.

First step from the service manual

Verify oven meat probe connection end is clean and no food/moisture is in socket. Use new meat probe to test for correct values in service screens. Replace meat probe or socket.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What U80 means on a Dacor oven

The U80 error code on a Dacor oven indicates a shorted condition in the upper or single meat probe circuit. Specifically, the oven's control board has detected an analog-to-digital (A/D) conversion value exceeding 0xF0 for 60 or more continuous seconds. The meat probe circuit uses a temperature-sensitive resistor (thermistor) inside the probe tip, and the control reads the probe's resistance to calculate meat temperature. When the A/D value rises above 0xF0 and stays there, the control interprets this as a short circuit rather than a valid temperature reading, triggering the U80 fault.

The most common cause of this fault is contamination at the probe socket. Food residue, grease buildup, or moisture inside the socket can create an unintended electrical path that drives the A/D reading artificially high, mimicking a short. A damaged probe with an internal short in its thermistor or cable can produce the same abnormal signal. Physical damage to the socket itself, such as bent or corroded contacts, can also cause continuous out-of-range readings.

Diagnosis begins with a thorough inspection of the probe socket inside the oven cavity. The socket contacts should be clean, dry, and free of debris. Testing with a known-good replacement meat probe while monitoring the service screen A/D values will confirm whether the fault follows the probe or remains with the socket. If values normalize with a new probe, the original probe is faulty. If the fault persists with a new probe, the socket or the wiring between the socket and control board requires further inspection and likely replacement.

Source: manufacturer service documentation.

Common causes of U80

  1. 01

    Contaminated probe socket

    Wiring / connection

    Food debris, grease, or moisture inside the probe socket can create a short-circuit path, pushing the A/D reading above the 0xF0 threshold. Inspect the socket carefully and clean it thoroughly with a dry cloth or compressed air before retesting.

  2. 02

    Faulty meat probe (internal short)

    Part replacement

    The thermistor or wiring inside the probe itself can fail and short internally, producing a continuously elevated A/D value. Swap in a new meat probe and check the service screen readings to confirm whether the fault clears.

  3. 03

    Moisture in the probe or socket

    Wiring / connection

    Water or steam intrusion into the probe tip or socket contacts can temporarily create a short-circuit condition. Allow the oven and socket to dry completely, then retest with a new probe.

  4. 04

    Damaged or corroded probe socket

    Part replacement

    Bent, corroded, or burned socket contacts will produce unreliable or out-of-range A/D readings even with a good probe connected. Visual inspection of the socket contacts will reveal physical damage requiring socket replacement.

  5. 05

    Wiring fault between socket and control board

    Part replacement

    A damaged wire or connector in the circuit path from the probe socket to the control board can cause a persistent short reading. If a new probe and clean socket do not resolve the U80 code, inspect the wiring harness for chafing, pinches, or loose connectors.

See the test procedure for each cause

Frequently asked questions about U80

What does U80 mean on a Dacor oven?
The U80 code means the oven's control board has detected a shorted condition in the upper or single meat probe circuit. The analog-to-digital value from the probe thermistor has exceeded the threshold of 0xF0 for 60 continuous seconds, which the control treats as an abnormal short. The most common culprits are a dirty or wet probe socket or a faulty probe with an internal short.
Can I fix the U80 error myself without calling a technician?
In many cases, yes. Start by unplugging the oven, then inspect and clean the probe socket to remove any food residue or moisture. If you have access to a replacement meat probe, plug it in and check whether the error clears when the oven is powered back on. If a new probe resolves the issue, you simply need to replace the original probe. If the fault persists after cleaning and swapping the probe, a technician should inspect the socket and wiring.
Is it safe to use my Dacor oven while the U80 code is active?
The U80 fault is specific to the meat probe circuit and does not necessarily prevent the oven from operating for standard baking or broiling functions. However, you should not rely on the meat probe for temperature monitoring while this fault is active, as the readings will be unreliable. It is best to resolve the fault before using the probe feature again to avoid inaccurate cooking results.
How much does it cost to fix a U80 error on a Dacor oven?
If only the meat probe needs replacement, the cost is typically in the range of $30 to $80 for the part, depending on the specific model. If the probe socket requires replacement, parts and labor could range from $100 to $250 or more. A wiring harness repair or control board diagnosis by a technician would add to that cost depending on what is found.
Will resetting the oven clear the U80 error code?
A power reset may temporarily clear the U80 code, but if the underlying cause such as a shorted probe or contaminated socket is still present, the code will return within 60 seconds of the fault condition being detected again. A permanent fix requires addressing the root cause, either by cleaning the socket, replacing the meat probe, or repairing the socket and wiring.

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