Samsung Oven/Range Error Code E-27 — Oven Temperature Sensor Open Circuit
What this means
The E-27 error code specifically indicates an open circuit in the oven temperature sensor loop. Unlike a general sensor error, E-27 points to a break in the circuit — either the sensor element itself has failed open, a wire in the harness is broken, or the connector is loose. The oven will not heat until this is resolved because it cannot monitor cavity temperature.
Alternate codes: E27
Step-by-step fix
4 stepsCheck the sensor connector
Turn off the breaker. Remove the rear panel of the range. Find the two-pin connector where the temperature sensor harness plugs into the control board harness. Unplug it, inspect for corrosion or bent pins, plug it back in firmly.
Corrosion on the pins is a common culprit — gently clean contacts with fine sandpaper or electrical contact cleaner.
Test the sensor for continuity
With the sensor disconnected, place your multimeter leads on the two sensor wires at the connector. You should read approximately 1,080–1,100 ohms at room temperature. An OL (open line) reading confirms the sensor or its wiring is broken.
Test at the sensor end as well — if the sensor itself reads good but the connector end reads OL, the wire harness has a break.
Inspect the wiring harness
Trace the sensor wires from the rear wall of the oven cavity to the control board connector. Look for pinch points, heat damage, or rodent chew marks. Pay special attention where the wires pass through the rear oven wall — heat cycling can make insulation brittle.
If you find a single break, you can splice and solder it with high-temperature wire and heat-shrink tubing as a quick repair.
Replace the temperature sensor
If the sensor itself reads OL, remove the mounting screw(s) inside the oven cavity, pull the probe out through the rear wall, disconnect the harness, and install the new sensor. Restore power and run a bake test.
After replacing the sensor, preheat to 350 °F and verify with an oven thermometer that the temperature is accurate within ±10 °F.
When to call a professional
If the wiring and sensor both test good but the error remains, the control board's sensor input may be defective. A technician can verify and replace the board.
Related error codes
The oven temperature sensor (thermistor) has an open or shorted circuit.
Moderate Fix · 30–60 minutes
The oven temperature sensor has a short circuit (abnormally low resistance).
Moderate Fix · 30–60 minutes
The oven has exceeded its maximum safe operating temperature.
Advanced Fix · 30–60 minutes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Oven Temperature Sensor
Part #DG32-00007B · $15–$30
If sensor reads OL (open line) on multimeter
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