The answer to 'why is my humidifier blowing cold air' is that the humidifier may not be working properly. This can be caused by a few common issues, such as a malfunctioning heating element, a problem with the water supply, or incorrect settings on the humidifier.
If the humidifier is blowing cold air, it likely means the heating element that warms the water is not functioning correctly. This could be due to a faulty component, mineral buildup, or other mechanical issues. Another possible cause is if the water supply to the humidifier is turned off or restricted, preventing the unit from producing warm, moist air.