Question about Aprilaire 600 Humidifier
Power humidifier warm air side installation
humidifier does not come on when second stage heat does. Fan on the humidifier comes on but the water is not supplied to the unit. It does come on with fan and water during the 1st stage.
If the installer used a #50 relay when they installed it they did not take in consideration the the fan will run at two different speeds in heating. Remove the #50 relay from the blower wire it is connected to. Reinstall it on the blowers white wire (neutral). This should fix the problem.
Posted on Mar 29, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
Jan 26, 2015 | Honeywell HE120 Humidifier
Unless you are using a current sensing relay or sail switch, you need to get the humidifier power from the blower motor supply so it only operates when the blower is on.
Since you can manually control the humidifier, there is not a fault with the solonoid.
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