I’ve an Aprilaire 8400 series thermostat and I’m trying to wire up my
Nest Learning Thermostat. There are 7 wires Red, Wht, Grn, Blk, Dk Blu,
Brn, Yl, and Org. There are two jumpers. One from RC to R and another
from W to W2. I can’t find any posts t...
