We were going to replace the TR8411R thermostat with a programmable one and have discovered that we apparently have a heat pump (we just bought the house last week). As we were trying to match the wires to the new thermostat we found that a blue wire was not attached. The installer seemed to follow the color coding to the lugs pretty well so we are assuming that the Blue wire should go to the B lug.

Currently there are wires attached as:
Lug Wire Color
R Red
W2 & E White
O Orange
Y Yellow
G Green
C Brown

L, B, W1 Currently don't have a wire connected to them.

Do you think we should attach the Blue wire to the B lug?

Are there special programmable thermostats for Heat Pumps?