What do I do if I only have 2 wires? Simple Customer Care May 03, 2018 20:32 Follow Please contact Simple customer care and we can provide you with a with a Common Maker kit. Support@thesimple.com Related articles I don't have a C-Wire What is a C-wire? Is my gas furnace compatible? Fast-Stat 1000 and Common Maker - Installation Guide Comments 0 comments Article is closed for comments.