The answer to 'dehumidifier not cooling' is that a dehumidifier not cooling is usually caused by a problem with the compressor or refrigerant system. This can lead to the dehumidifier not lowering the humidity as effectively as it should.
Some common causes include a refrigerant leak, a faulty compressor, or a problem with the condenser coil. Symptoms may include the dehumidifier running but not lowering humidity, the air coming out feeling warm instead of cool, or the dehumidifier not turning on at all. In many cases, this requires professional repair by an HVAC technician to diagnose and fix the underlying issue.