The part(s) or condition(s) listed below for the symptom Humidifier not draining are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
The water evaporator pad might be clogged with calcium and other mineral deposits. Once the water evaporator pad is clogged, the water rides along the top of the pad and drips down outside of the water collection tray at the bottom. If water does not exit properly check the water evaporator pad and replace as needed. If the humidifier doesn’t drain properly, the water evaporator pad might be clogged with mineral deposits. If the water evaporator pad is clogged, the water will slide over the evaporator pad and drip outside of the water collection tray. Check the water evaporator pad—if the pad is clogged, replace it.
One of the water lines might be broken or out-of-position. Check the water line from the water inlet valve to the water evaporator pad, and check the water line from the bottom of the humidifier. If the water line is clogged, try cleaning it out. If the water line still leaks after you clean it out, replace the water line.
The water distribution tray sits at the top of the water evaporator pad. It is designed to direct the flow of water over the evaporator pad so that the water drips evenly into the pad. If the distribution tray is out of place, clogged, or cracked, water will not drip into the water evaporator pad.