The dehumidifier is not blowing "cold" air if it is not extracting condensation - unless there is no moisture in the air to be extracted.
Please check your internal thermostat and consider that air blowing rapidly across the skin will give the sensation of 'coolness' simply because that is the effect of air blowing across skin - it feels cooler - as long as it is at a temperature lower than body temperature.
If the unit is operating, and is not extracting moisture from the air, then either there is insufficient refrigerant in the unit, or there is insufficient moisture in the air.
These are simple units: they cool a coil (Aluminum-veined, serpentine copper tubing); pull air across the cooled coil; deposit moisture from air as it hits the cooled coil; drips the accumulated moisture to a collection device.
If the compressor (the device that cools the refrigerant running through the copper tubing) is operating then either there is insufficient refrigerant (a.k.a.: freon), or there is a leak in the refrigerant tubing - again resulting in insufficient refrigerant.
Turn the unit on: If, after the blower runs for a time, you can hear or feel a 'shudder' as another device begins working, then the compressor is operating. If the compressor is not operating... This unit will live no more. Remove the various metals, and take to a metal reclaim yard. (Copper is becoming almost 'semi-precious in value.)