How do I wire my hot air gas furnace with a CK-43F or CK-43 and a power venter?
Find the terminal board on the furnace (it usually has terminals RWGCY). Remove the white wire from W on the furnace terminal board and re-route it to T1 on the CK kit. Run a new wire from T3 to the GSK-3 (if applicable) and from the other side of the GSK-3 to W on the furnace terminal board. Run T2 to C on the furnace terminal board. Follow tthe CK instructions for the L1, N, & M terminals.