In the winter, when you run the heat, it doesn't turn on the AC
compressor outside. If you are technical and want to bypass the nest
like I did, you can turn off the power switch near the furnace, jumper
your r and y1 wires together, then flip back o...
My issue was the cable that went from my furnace to the outside air
compressor. Apparently because it can be exposed, mice and weed whackers
can cause a break into that cable and cause a short which is one of the
things that can cause an e103 error. ...
For future reference, I initially tried replacing my contactor, I still
had the issue. I figured I had a non obvious short in my 24v wire from
my furnace control board to my AC compressor. I replaced my wire,
luckily it was only a fifteen foot run. I...