thanks much....getting closer.will the humidifier work when blower is on if wired this way ? i guess i'm confused...with what you mean by circle wires together?the aprilaire instructions have me connecting the soleniod direct to the a/a on the control.i am using outdoor sensor and this is a gas furnace.do i have to use 110v source or can i go to c w r g y or hum on furnace...thanks for your response

Hey Thanks HKestenholz
U are the man Gonna try a couple of things and get back to u with results. Thanks again!!!

You are the master of Aprilaire humidifer electrical hookup. I have been looking at the schematic panel on my 2002 Heil furnace and my Aprilaire 700 diagram and racking my brain since I bought the thing! Thanks