The answer to 'why is my humidifier not working' is that there are several common causes, including a clogged filter, mineral buildup, faulty components, or a problem with the water supply. Symptoms may include low humidity output, strange noises, or the humidifier not turning on at all.
Some potential solutions include cleaning or replacing the filter, descaling the unit to remove mineral deposits, checking for any faulty electrical connections or broken parts, and ensuring the water supply is working properly. If you're not comfortable troubleshooting the issue yourself, it's best to call in a professional HVAC technician to diagnose and repair the problem.