On Saturday, January 13, 2018 at 1:06:04 PM UTC-5, Tom Biasi wrote:
Anyone know where I can get a schematic of the control board for a
Whitfield Advantage Plus?
TIA, Tom

I would start with the mother ship:

Innovative Hearth Products
1508 Elm Hill Pike, Suite 108
Nashville, TN 37210

Phone: (615) 925-3428
Toll-free Phone: (800) 655-2008

Peter Wieck
Melrose Park, PA