Old HW thermostat has a yellow wire which connects to Y but then
continues over to W. System is a heat pump.So which or both (Y or W) go
in compatibility checker? When connecting to Nest does that yellow wire
go to Y or W. Other wires: red to R, whit...
Clearly a jumper but not a typical one since it's all 1 wire. So, would
I connect yellow to Y or W on the Nest. I don't know which of the 2
jumped connections to eliminate and which to use. Hard to see but the
yellow wire is stripped in about a 1/2 i...