The answer to 'why is my humidifier' is that there are several common reasons a humidifier may not be working properly. Potential issues include a clogged filter, mineral buildup, low water level, thermostat problems, or a malfunctioning humidifier unit. Symptoms can include low humidity output, leaks, or the humidifier not turning on at all.
Many humidifier problems can be fixed with basic troubleshooting and maintenance. Homeowners can try cleaning the filter, checking the water level, and descaling the unit. However, more complex issues like thermostat or component failures may require calling in a professional HVAC technician for repair or replacement.