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Error code reference

Samsung Hood Error Code E-31

Weight sensor open error (HEX value above FF for 5 seconds).

Samsung codesSamsung hood codes

Weight sensor open error (HEX value above FF for 5 seconds).

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What E-31 means on a Samsung hood

The E-31 error code on a Samsung hood indicates a weight sensor open circuit fault. Specifically, the control system is detecting a HEX value above FF from the weight sensor signal for a continuous period of 5 seconds, which the controller interprets as an open circuit condition. An open circuit in this context means the electrical path through the sensor has been broken, preventing the control board from receiving a valid analog signal within the expected range.

The weight sensor in a hood application is typically used to detect the presence of a filter or cooking vessel, contributing to automated operational logic. When the sensor circuit goes open, the resistance or voltage reading falls completely outside the expected operating window, triggering the fault. Common causes include a broken wire in the sensor harness, a failed sensor element, or a corroded or disconnected connector between the sensor and the main control board.

Because the fault must persist for 5 seconds before the code is set, intermittent connection problems, such as a loose connector that breaks contact during vibration, can also trigger E-31. Technicians should inspect the full wiring harness from the weight sensor to the control board, checking for pinched wires, corrosion at connector pins, and continuity through the sensor itself. If the sensor reads open with no continuity across its terminals, the sensor requires replacement. If wiring checks out, the control board may have a failed input circuit.

Source: manufacturer service documentation.

Common causes of E-31

  1. 01

    Disconnected or loose sensor connector

    Wiring / connection

    The wiring connector between the weight sensor and the control board may have worked itself loose due to vibration during operation. Check all connectors in the sensor harness for secure seating and signs of corrosion.

  2. 02

    Failed weight sensor

    Part replacement

    The sensor element itself may have developed an internal open circuit, meaning it will show no continuity when tested with a multimeter. A completely open sensor reading confirms the sensor needs replacement.

  3. 03

    Damaged wiring harness

    Wiring / connection

    A wire in the harness leading to the weight sensor may be broken, pinched, or chafed through, interrupting the circuit. Visually inspect the harness routing for damage and test continuity along each wire.

  4. 04

    Corroded connector pins

    Wiring / connection

    Grease, moisture, and heat from cooking can cause connector pins to corrode over time, increasing resistance until the circuit reads open. Clean or replace affected connectors if corrosion is found.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor and all wiring test good, the input circuit on the control board may have failed, causing it to misread the sensor signal as an open circuit. Control board replacement is typically a last resort after ruling out all other causes.

See the test procedure for each cause

Frequently asked questions about E-31

What does E-31 mean on a Samsung hood?
E-31 indicates a weight sensor open circuit error. The control board is not receiving a valid signal from the weight sensor, and the out-of-range condition has persisted for at least 5 seconds. This points to a broken connection, a failed sensor, or damaged wiring in the sensor circuit.
Can I fix E-31 on my Samsung hood myself?
If the problem is a loose connector, a DIYer comfortable working with appliance wiring can unplug the unit, locate the weight sensor connector, reseat it firmly, and check for obvious wire damage. If the sensor itself has failed or the wiring harness is damaged, the repair involves sourcing a replacement part and basic electrical work, which is manageable for experienced DIYers but may warrant a technician for others.
Will resetting the hood clear the E-31 error?
A reset may temporarily clear the code, but if the underlying open circuit condition is still present, the error will return within seconds because the fault requires only 5 continuous seconds of an out-of-range sensor reading to trigger. A reset alone is not a fix and should only be used to confirm whether the fault is persistent or intermittent.
Is it safe to use my Samsung hood while E-31 is displayed?
Operating the hood with an active sensor fault means the control system cannot properly read weight sensor data, which may affect automated functions that depend on that input. While the immediate fire or electrical risk from this specific fault is low, continued use without resolving the issue is not recommended, as the hood may not operate as intended and could mask additional problems.
How much does it cost to repair a Samsung hood E-31 error?
If the fix is simply reseating a connector, there may be no parts cost at all, only the time investment. A replacement weight sensor typically costs in the range of $20 to $80 depending on the specific model. A new control board, if that turns out to be the faulty component, generally runs $100 to $250 or more, and professional labor for diagnosis and repair commonly adds $80 to $150 on top of parts.

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