Samsung Air Conditioner Error Code E272

E272 indicates a low pressure sensor error caused by an open or short circuit in the sensor wiring. The control board detected a sensor voltage either below 0.5V, which signals a short, or above 4.2V, which signals an open circuit. The unit shuts down to protect the compressor from running under unknown or unsafe refrigerant pressure conditions.

No. The E272 error causes the unit to shut down intentionally to protect the compressor. Running the system without a functioning low pressure sensor means the compressor could operate under dangerously low refrigerant pressure, which can cause compressor failure. Leave the unit off until the sensor fault is diagnosed and corrected.

A reset may temporarily clear the error code, but if the underlying wiring fault or sensor failure still exists, E272 will return as soon as the unit restarts and the control board checks the sensor signal again. A reset alone does not fix the problem. The sensor circuit must be inspected and the fault corrected before the unit will operate normally.

Some causes of E272 are DIY-accessible, such as reseating a loose sensor connector, inspecting the wiring harness for visible damage, or cleaning corroded terminals. However, if the refrigerant system itself has a pressure problem or the sensor requires replacement with handling of refrigerant lines, a certified HVAC technician should perform the work. Always disconnect power before inspecting any wiring inside the unit.

Repair costs depend on the root cause. A simple connector repair or harness fix might cost between $75 and $150 in labor if done by a technician. Replacing the low pressure sensor typically adds $30 to $80 in parts. If the control board needs replacement, total costs can range from $300 to $600 or more depending on the model and labor rates in your area.