I bought a house that has a non-functioning Lasko 5000L whole-house humidifier. It fails to add any measurable humidity to the air, and the green LED does not come on during operation. Other than that, everything I've been able to observe seems to be functional. The unit (installed on the return duct) properly kicks on with the furnace assuming the humidistat is set high enough - as evidenced by the solenoid sound and plenty of flowing water. The humidistat operates correctly, activating the unit when set above the ambient humidity. Filter has been replaced, and with the cover off, I can watch water flow into the top and out through the clear drain tube. Intake ducting from furnace seems plenty warm and the damper is fully open. I have no idea what the lack of a green LED signifies. It doesn't seem like there's a fan with this type of model, and if there's a control board, I have no idea what it could be controlling that isn't working. I'm actually considering replacing the whole unit because I'm out of ideas (and a replacement unit would likely be about the same cost as a service call).
Usually, humidifiers are installed in the main distribution duct. It would make no sense to install it in the return duct.
SOURCE: lack of humidity
Try the following test, ( I will resume this is a flow through humidifier)
Spray water directly oin the filter make sure it is saturated. Some water should leak from the bottom. After 10 min measure the Humidity to see if this helped. If there is a higher level of humidity the pbm is that not enough water is saturating the filter. Check the level of the filter & water feed nozzle.
Option 2 is to connect the water feed tube to a Hot water source.
Hope this helps.
SOURCE: Honeywell HE260 leaks somewhere
Neither, even if the solenoid or humidistat stick, it should always drain properly. Is the unit mounted on the cold air return duct or the supply plenum? If it's mounted on the supply plenum, the water panel might be getting blown forward and spilling the water. High efficient furnaces also can leak water on the floor if its drain is restricted. If hum. is mounted on return duct make sure drain is clear by blowing through it. On Honeywell hum's I've seen the rubber hose from the solenoid valve to the distributor tray leak too, check the rubber 1/4" hose.
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