Question about Aprilaire 1120 Humidifier

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My water never stops running into Aprilaire 112

When furnace stops and Aprilaire is off water keeps coming

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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.
Good luck
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Posted on Mar 08, 2009

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