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Error code reference

Samsung Range Error Code bo

IGBT (Insulated Gate Bipolar Transistor) sensor open (high resistance) error on inverter board; may occur…

Samsung codesSamsung range codes

IGBT (Insulated Gate Bipolar Transistor) sensor open (high resistance) error on inverter board; may occur when ambient temperature falls under 14°F.

First step from the service manual

If top sensor resistance matches chart and wiring is OK, replace Ass'y Inverter Module PCB.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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What bo means on a Samsung range

The bo error code on a Samsung range indicates an IGBT (Insulated Gate Bipolar Transistor) sensor open error on the inverter board. Specifically, the sensor circuit is reading abnormally high resistance, which the control system interprets as an open circuit condition. The IGBT is a critical power switching component within the inverter module PCB that controls the high-frequency induction heating elements on induction-capable Samsung ranges. When the sensor associated with this transistor reports an open circuit, the range cannot reliably manage power delivery to the cooktop and triggers this fault to prevent damage or unsafe operation.

A key environmental factor linked to the bo code is ambient temperature. Samsung's diagnostic data notes that this error may appear when the surrounding temperature drops below 14 degrees Fahrenheit. At extremely low temperatures, sensor resistance characteristics can shift outside normal operating parameters, causing a false open-circuit reading even when the hardware is otherwise functioning correctly. This is important context for technicians diagnosing ranges installed in unheated spaces such as garages, outdoor kitchens, or regions experiencing extreme cold snaps.

Diagnosing this code requires measuring the top sensor resistance and comparing it against the resistance chart specified for the unit. If the measured resistance values match the chart and all associated wiring connections are intact with no visible damage, fraying, or loose terminals, the fault points to the inverter module PCB assembly itself. In that scenario, replacement of the Ass'y Inverter Module PCB is the recommended corrective action.

Source: manufacturer service documentation.

Common causes of bo

  1. 01

    Extreme cold ambient temperature

    Wiring / connection

    When the installation environment drops below 14 degrees Fahrenheit, the IGBT sensor resistance can shift to abnormally high levels and trigger a false open-circuit error. Moving the appliance to a warmer environment or allowing it to warm up may resolve the code without any parts replacement.

  2. 02

    Faulty Inverter Module PCB

    Part replacement

    If the sensor resistance checks out against the resistance chart and all wiring is confirmed good, the inverter module PCB itself is defective. Replacement of the Ass'y Inverter Module PCB is the indicated fix in this scenario.

  3. 03

    Open or damaged sensor wiring

    Wiring / connection

    A broken wire, corroded connector, or loose terminal in the harness connecting the IGBT sensor to the inverter board can produce a high-resistance reading consistent with the bo error. Inspect the full wiring path for continuity and secure connections before replacing any boards.

  4. 04

    IGBT sensor out of specification

    Part replacement

    The sensor itself may have drifted out of its specified resistance range due to age or heat stress. Comparing the measured resistance to the resistance chart will confirm whether the sensor is within acceptable parameters.

See the test procedure for each cause

Frequently asked questions about bo

What does bo mean on a Samsung range?
The bo code on a Samsung range indicates an IGBT sensor open error on the inverter board. The sensor circuit is reading abnormally high resistance, which signals an open circuit condition to the control system. This error can occur due to a faulty inverter PCB, damaged wiring, or exposure to extremely cold ambient temperatures below 14 degrees Fahrenheit.
Can I fix the bo error code on my Samsung range myself?
Some causes of the bo error are DIY-friendly. If the range is installed in a cold location, allowing it to warm up to normal room temperature may clear the code. You can also inspect visible wiring for loose connections. However, if the fault points to the inverter module PCB after resistance testing, replacing that board is a more involved repair that requires comfort working with electronic components and disconnecting high-voltage parts.
Is it safe to use my Samsung range while the bo error is displayed?
It is not recommended to continue using the range while the bo error is active. The code indicates a fault in the inverter board's sensor circuit, which controls power delivery to the induction elements. Operating the range in this condition could cause unpredictable behavior or further damage to the inverter module. The range should be diagnosed and repaired before returning it to regular use.
Will resetting my Samsung range clear the bo error code?
A reset may temporarily clear the bo code, but it will return if the underlying issue is not resolved. If the error is caused by a low ambient temperature, warming the unit and resetting it may be sufficient. If the cause is a faulty inverter PCB or damaged wiring, the code will reappear after a reset because the hardware fault remains present.
How much does it cost to repair a Samsung range with the bo error code?
Repair costs depend on the root cause. If the issue is simply a cold environment, there may be no parts cost at all. If the inverter module PCB needs to be replaced, parts alone typically range from around $150 to $350 or more depending on the model, with additional labor costs if a technician performs the work. Getting a diagnostic estimate before committing to the repair is advisable.

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