Question about Aprilaire Humidifiers
I had it wire to the 24V leads in the furnace cabinet but the only time the water valve turns on to the unit is when I do it manually with the setting dial. Also, what stops the water from running once the filter element gets saturated with water?
The humidifier should turn on and off with the blower motor of the Furnace. This can be done by wiring the the humidifier to the HUM terminal on the furnace control board and then stepping down the power with a transformer. If the humidifier has it's own tarnsformer then a current sensing relay can be used by attaching it to the blower motors common wire.
Posted on Jan 14, 2013
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Posted on Jan 02, 2017
Disconnect the two yellow wires. The water should stop. If it does you have a bad (or miswired) humidistat. If the water does not stop the solenoid valve is bad. These valves are known to be expensive. You might want to consider replacing the whole unit.
Posted on Mar 08, 2009
sounds like you may have it wired to a continuous power source vs one that shuts off with the furnace. The most common wiring is red to C & white to W
Posted on Jan 13, 2010
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