Samsung Oven E27 Error Code — What It Means
The E27 error code on Samsung ranges and ovens indicates an open oven temperature sensor circuit. The control board is not detecting the expected resistance from the cavity temperature sensor or its wiring harness. This fault lives in the sensor circuit, not automatically the main control board. The oven will not heat properly until the open circuit is repaired.
Common Causes
- Failed oven temperature sensor The thermistor inside the oven cavity has failed and now reads open circuit instead of normal resistance.
- Disconnected or loose sensor connector The wiring connector between the sensor and control board has vibrated loose or was not fully seated during prior service.
- Damaged sensor wiring harness The wires running from the sensor to the control have been chafed, pinched, or damaged by rodents, creating an open circuit.
- Corroded or burned harness connection Heat or moisture has damaged the connector terminals or wire insulation where the sensor plugs into the harness.
- Defective control board sensor input If the sensor and all wiring test correctly, the control board’s input circuit for the sensor has failed internally.
Step-by-Step Fix
- Disconnect all power to the range by unplugging it or switching off the circuit breaker before opening any panels.
- Remove the rear access panel to expose the oven cavity wiring and locate the oven temperature sensor and its harness connector.
- Unplug the sensor connector from the control board or harness junction and use a multimeter to measure the resistance across the sensor terminals.
- Check the reading against the expected value (about 1,080 ohms at room temperature for Samsung sensors). If the meter reads open or infinite resistance, replace the sensor.
- Inspect the harness visually for chafing, rodent damage, burned insulation, or loose pins if the sensor resistance is normal.
- Test continuity through each wire of the harness from sensor plug to control board plug. Repair or replace the harness if any conductor is open.
- Reassemble and restore power, then run a test cycle to confirm the error clears and the oven heats normally. If E27 persists after sensor and harness are verified good, suspect the control board.
Parts Often Needed
| Part | Notes |
|---|---|
| Samsung oven temperature sensor | Amazon | Match the sensor part number to your exact model number for correct fit and resistance specification. |
| Oven sensor wiring harness | Amazon | Order if the harness shows visible damage, chafing, or open conductors that cannot be repaired with splicing. |
| Electronic control board | Amazon | Only required if both sensor and harness test correctly but the E27 code will not clear. |
When to Call a Pro
Call a qualified appliance technician if you are not comfortable working with household electrical circuits or removing panels from a hardwired range. Also bring in a pro if you have replaced the sensor and verified the harness integrity but the E27 error still appears, since control board diagnosis requires specialized tools and experience. If your range is still under warranty, contact Samsung or an authorized service center before attempting any repair.