I'm connecting my new thermostat with two wires, one red and one white. When connecting the red wire does it go directly in the rh slot along with the jumper that is already in place? I had it set up this way and my heat would not come on. I put the old thermostat back up and it worked fine. Any help would be great.

Old thermostat brand and Exact part number?

mike 12,

I use my RTH221B for oil fired hot water heating system control only and connected mine: white to Rh (along with jumper), red to W. So far, so good.