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Model 400-should filter be wet??don't know if my unit is working??
Aprilaire 400 Humidifier
Problem for Aprilaire 400 Humidifier
Why doesn't my humidifier work when heat is on
Popular Solutions for Aprilaire 400 Humidifier
Questions and Unsolved Problems for Aprilaire 400 Humidifier
Do you recommend Aprilaire 400 Humidifier?
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My Aprilaire 400 will only work on test mode. Currently connected in auto-mode.
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Unist controller reads 33 but hygrometer through out the house read 25% at 68 degrees. Controller is...
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Fan goes on but water dose not enter unit
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