Machine works, but no water collecting

A dehumidifier is basically a cooler. The condenser coil on the outside should feel cold to the touch usually around 34 to 38 degrees, as air passes over the coils they collect the humidity in the air and it then drips down into a collector tray. If the coil does not feel cold it is ether a bad control switch not letting the cooler (compressor) turn on, low on freon, or burned out compressor