Humidifier Not Getting Water? Humidifier Troubleshooting
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Common solutions for: Humidifier not getting water
01 - Water Inlet Valve
The water inlet valve is an electrically-controlled valve that opens to allow water to enter the humidifier. If the water inlet valve is clogged or defective, the humidifer will not fill with water. Use a multimeter to test the valve for continuity. If the water inlet valve does not have continuity, replace it. In addition, test the incoming power to the valve. If the water inlet valve has continuity and is getting power, but the humidifier won't fill with water, it is possible that the valve is... clogged. If the water inlet valve is clogged, replace it.
Top Solution
02 - Clogged Saddle Valve
The saddle valve is a small brass water supply valve which is often clamped to a copper household water supply pipe. Over time, the saddle valve can become clogged with sediment or calcium deposits. Because it is difficult to clean a saddle valve thoroughly, and because the replacement cost is fairly low, we recommend replacing the saddle valve if it is restricted.
Top Solution
03 - Humidistat
If the humidistat is incorrectly set or isn't working properly, the humidifier won't fill with water. To determine if the humidistat is defective, turn the humidistat to the highest setting and listen for a "click." If you do not hear a click, this indicates that the electrical contacts inside the humidistat are not closing. If you do hear a click, but the humidifier still won't fill with water, it is more likely that another part is defective.
Highly Likely
04 - Water supply valve turned off
Confirm the water supply shut off valve is in the on position. You may have to rotate or pull a knob or move a lever to open and shut the valve. You can follow the water line from the humidifier's water inlet valve to find the water supply valve.
Less Common
05 - Humidistat turned off or not set properly
If your humidifier is not getting water, verify that the humidistat is on and set properly. If there is a on/off switch, make sure it's turned on. A normal comfortable humidity range in a home is between 40% to 50%. Refer to owner's manual for guidance.
Uncommon But Possible
06 - Water Supply Problem
If the humidistat is set properly, the humidifier is turning on when the furnace runs, and the water supply valve is on, but not water is reaching the water inlet valve, then there may be a water supply issue.
Uncommon But Possible
07 - Normal Operation
The humidifier only lets water in when the furnace is on. If water is trickling through the evaporator pad when the furnace is running and the humidistat is on, this is normal operation.