Selling as faulty. I bought this from Meaco as a Grade B item, a minor mark on the display (see pic) however on higher fan speeds from 4 to 12 the speed of the fan keeps decreasing then returning  but runs as normal on lower fan speeds from 1 to 3. This is the same on all three modes, normal, night & eco (adjusts fan speed based on room temperature). It isnt the power supply cable plug as i have tried it with another. Its either an issue with the internal power supply unit or a temperature sensor.