I am trying to trouble shoot my Aprilaire 600. It was already installed when we purchased the house 3 years ago but I don't believe we ever turned it on after purchasing the house in the summer.
The humidifier is power from the furnace and it is getting 24 V from the furnace to the humidistat. Out of the humidistat, I get no voltage going to the solenoid. I have replaced the humidistat and the solenoid, and still: nothing.
Any ideas? And thank you.