Samsung Oven Error Code E-27 — What It Means
The Samsung oven error code E-27 typically indicates a problem with the oven’s temperature sensing or communications related to temperature control. When the range or wall oven cannot read a valid temperature signal (or detects a short/open in the sensor circuit), the control board will display E-27 and may stop normal cooking functions. This error can occur intermittently or persistently and often leads to inconsistent baking, longer or shorter cook times, inaccurate displayed temperature, or the oven refusing to heat. In some cases a temperature-sensor fault can present a safety risk—if the oven can’t monitor or control actual temperature it could overheat or fail to shut off properly—so prompt diagnosis and repair are recommended.
Common Causes
- Faulty oven temperature sensor (NTC thermistor) — open, shorted, or out-of-spec
- Loose, damaged, or corroded wiring/connectors between sensor and main board
- Failed or failing main control board (PCB) or its sensor input circuit
- Software/firmware glitch requiring a power reset or control board reset
- Physical damage to the sensor from high heat, spill infiltration or impact
- Intermittent ground or neutral issues affecting sensor voltage reference
Troubleshooting Steps
- Power cycle the oven: turn off power at the breaker for 60 seconds, then restore power. Watch if E-27 returns — this can clear transient faults.
- Inspect the sensor and wiring visually: remove the oven racks and check for obvious damage, loose connectors, burn marks, or melted insulation around the sensor wiring.
- Safely disconnect power, then test the sensor with a multimeter for continuity and resistance. If it is open or shorted, or far outside the expected range, the sensor should be replaced. Refer to the service manual for the correct resistance range for your model.
- Check connectors at the main control board for corrosion or loose pins. Reseat any multi-pin connectors and ensure a firm connection.
- If the sensor and wiring measure OK, try swapping the sensor harness connection (if another identical plug is available) or inspect the control board for visible damage or burnt components.
- Look for error history/reset options in the oven’s user menu; on some models you can run a diagnostics mode that returns specific sensor or board fault codes.
- Replace the temperature sensor first if it fails testing — it’s a common and relatively inexpensive fix. After replacement, power on and verify normal operation and accurate temperature control.
- If a new sensor does not fix the error, the main control board may be defective. At that point consider professional diagnosis because board replacement and firmware calibration can be complex.
- For gas ovens: if you suspect the problem ties into ignition or gas control, stop using the appliance and consult a qu