Samsung Microwave Error Code E-27

E-27 is a sensor open error indicating the microwave's control board cannot detect a valid signal from the temperature sensor. This means the circuit between the sensor and the control board appears broken or incomplete. The issue may be a disconnected connector, damaged wiring, or a failed sensor element. The microwave flags this error to prevent uncontrolled or inaccurate cooking operation.

Unplugging the microwave for a minute and plugging it back in may temporarily clear the E-27 code, but the error will return if the underlying sensor issue has not been resolved. A reset does not fix a disconnected connector, damaged wiring, or a failed sensor. Proper diagnosis and repair of the sensor circuit are required for a lasting fix.

Repair costs depend on what component has failed. A replacement temperature sensor typically falls in the range of $15 to $50 for the part alone. If professional labor is involved, total repair costs including diagnosis and installation can range from $80 to $200 or more. A damaged wiring harness or a failed control board will push costs toward the higher end of that range.

Some causes of E-27, such as a loose sensor connector, can be addressed by a careful DIYer after unplugging the unit and accessing the internal components. However, working inside a microwave carries serious safety risks due to the high-voltage capacitor, which can retain a lethal charge even when unplugged. If you are not trained in safely discharging a microwave capacitor, professional service is strongly recommended.

It is not recommended to continue using the microwave while E-27 is active. The temperature sensor is critical for monitoring internal heat levels, and operating without accurate sensor feedback can lead to improper cooking performance or uncontrolled heating conditions. Power off the unit and address the error before further use.