Hello Pablo, how are you? One thing is that it sounds and turns off another is that it sounds continuously in general lines if it sounds continuously it is marking a fault and you start to verify if it closes the door well if it activates the knobs of the light, if it was with network switch (switch inside the frame that divides up and down) if you turn on the fan and turn off the light ((it is tested by passing a magnet through the dividing frame)) it is checked whether a fan works and is followed by the sensors if there is no uncalibrated or broken. There are refrigerators that sound the alarm when there is a cold in the cabinet due to refrigerant leakage or compressor failures. Others sound the alarm until the sensor receives cold and is silenced and others due to plate failure and also due to failure or false contact of the plugs on the plate and takes it as an open door or lack of cold because the signal does not arrive in order There are many variables, it's just a matter of sitting down and checking everything