The answer to 'humidifier blowing hot air' is that the humidifier is likely malfunctioning and blowing out hot air instead of the expected cool mist. This can be caused by a few common issues, such as a faulty heating element, a problem with the water supply, or a thermostat malfunction.
If your humidifier is blowing hot air, the first step is to check the settings and ensure it's not in a 'warm mist' mode, which is designed to produce hot vapor. If it's in the correct mode but still blowing hot air, you'll need to troubleshoot further. This may involve cleaning the unit, checking for mineral buildup, or replacing worn-out components. In some cases, the issue may require professional repair or replacement of the humidifier.