We have a large selection of furnace parts manuals / wire diagrams online.
To help you look up your part number by model number. Click on Furnace Parts Manuals then use Control and F to search your model number. ctrl+F
1 Year Warranty on ALL parts!
OBSOLETE, ITEM NO LONGER AVAIL Lower control board found on 7681-7701 universal blend air systems. Measures 3" x 2.25" with one switch.
Replaces 7681-399, 7681-3991 & 7681-399/A. Matching upper boards no longer available. NLA No Longer Available