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Error code reference

Samsung Range Error Code E-27

Oven sensor opened (resistance over 2950 ohms), detected 20 seconds after oven starts working.

Samsung codesSamsung range codes

Oven sensor opened (resistance over 2950 ohms), detected 20 seconds after oven starts working.

First step from the service manual

Disconnect power, open back cover, disconnect sensor harness from control, measure sensor resistance (should be 1080 ohms at room temperature).

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

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What E-27 means on a Samsung range

The E-27 error code on a Samsung range indicates that the oven temperature sensor circuit has opened, meaning the control board is reading a resistance value above 2950 ohms from the sensor. The oven temperature sensor, also called an RTD (resistance temperature detector), is a thermistor-based component mounted inside the oven cavity. It works by changing its electrical resistance in a predictable way as temperature rises or falls. At room temperature, a properly functioning sensor should measure approximately 1080 ohms. When the resistance climbs above 2950 ohms, the control board interprets this as a failed or disconnected sensor and triggers E-27 exactly 20 seconds after the oven begins operating.

The most common root causes fall into three categories: a physically failed sensor, a wiring harness problem, or a faulty control board. The sensor itself can fail internally, causing its resistance to spike or become infinite (open circuit). The wiring harness connecting the sensor to the control board can develop breaks, corrosion at the connector pins, or loose terminals that interrupt the circuit and produce an artificially high resistance reading. In rarer cases, the control board's sensor input circuit fails and misreads an otherwise healthy sensor.

Diagnosing E-27 starts with disconnecting power to the range, removing the back cover panel, and unplugging the sensor harness from the control board. Using a multimeter set to measure resistance, probe the two terminals of the sensor connector directly at the sensor end. A reading near 1080 ohms at room temperature confirms the sensor is good and the fault likely lies in the wiring or control board. A reading significantly above 2950 ohms, or an open-circuit reading (OL on the meter), confirms the sensor itself has failed and needs replacement.

Source: manufacturer service documentation.

Common causes of E-27

  1. 01

    Failed oven temperature sensor

    Part replacement

    The sensor's internal resistance element breaks down or opens, causing resistance to exceed 2950 ohms. Confirmed by measuring resistance directly at the sensor connector, where a reading well above 1080 ohms or an open circuit (OL) indicates sensor failure.

  2. 02

    Damaged or broken sensor wiring harness

    Part replacement

    The wire harness running from the sensor to the control board can develop breaks, burns near the oven cavity, or corroded terminals that interrupt the circuit. Inspect the full length of the harness and connector pins for visible damage or oxidation.

  3. 03

    Loose or disconnected sensor connector

    Wiring / connection

    Vibration or a previous repair can cause the sensor harness connector to partially unseat from the control board or sensor terminal, producing an open circuit reading. Check that both ends of the harness are fully seated and latched.

  4. 04

    Corroded connector pins

    Wiring / connection

    Moisture or grease contamination inside the sensor harness connector can corrode the metal pins, increasing resistance in the circuit beyond acceptable limits. Inspect the connector terminals closely and clean or replace as needed.

  5. 05

    Faulty control board sensor input circuit

    Part replacement

    If the sensor measures correctly at approximately 1080 ohms at room temperature and the wiring harness shows no damage, the control board's sensor monitoring circuit may have failed and is misinterpreting the signal. Control board replacement is required in this scenario.

See the test procedure for each cause

Frequently asked questions about E-27

What does E-27 mean on a Samsung range?
E-27 means the oven temperature sensor circuit has opened, with the control board detecting a resistance above 2950 ohms from the sensor. This fault is detected 20 seconds after the oven starts operating. The sensor, which should read approximately 1080 ohms at room temperature, has either failed internally, lost a wiring connection, or developed a harness fault. The oven will not operate normally until the underlying cause is corrected.
Can I fix E-27 myself on a Samsung range?
A knowledgeable DIYer can diagnose and often fix E-27 by disconnecting power, removing the back cover, and using a multimeter to test the sensor resistance at the harness connector. If the sensor reads significantly above 1080 ohms or shows an open circuit, replacing the oven sensor is a straightforward repair that involves removing one or two screws inside the oven cavity and swapping the connector. Wiring harness repairs or control board replacement are more involved and may warrant a professional technician.
Is it safe to use my Samsung range when E-27 is showing?
You should not attempt to use the oven when E-27 is active. The error indicates the control board cannot read oven temperature, which means it cannot regulate heat safely or accurately. Continuing to run the oven without a functioning temperature sensor risks overheating. The range's surface burners may still function normally, but the oven should remain off until the fault is resolved.
Will resetting my Samsung range clear the E-27 error?
Disconnecting power briefly may temporarily clear the error code display, but E-27 will return within 20 seconds of the oven starting again if the underlying fault still exists. Because the control board actively monitors sensor resistance each time the oven operates, the code is not a stored fault that can be permanently cleared by a reset alone. The sensor, wiring, or control board issue must be repaired first.
How much does it cost to repair E-27 on a Samsung range?
Oven temperature sensor parts typically range from around $20 to $65 depending on the specific model. If a technician performs the repair, total costs including labor generally fall between $100 and $250 for a sensor replacement. A wiring harness repair adds some labor time, while a control board replacement can bring costs to the $200 to $400 range or higher. Getting a diagnostic visit quote first is a good way to confirm which component is at fault before committing to repair costs.

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