old one has the standard Y, G, and Y,

then there is a W1 and W2 dont know where to put them

this is just a plain jane furnace with an aftermarket central air unit,

everyone is telling me it must be a heat pump or two stage unit.... I highly doubt it.

Thanks in advance for any help.

I meant R, G, and Y,

R is for power, g is for fan, y is for cooling, w1 is for heat. the w2 should not do anything

you have 6 wires hooked up now?

you have 6 wires hooked up now?

no 5

the old thermostat also Montgomery Ward has R, G, Y, and W1 and W2

W1 and W2 if I follow them to the furnace they hook up to a transformer labeled W1 and W2

the R G Y all hook up to a second seperate transformer inside the furnace

it looks like in the old thermostat that W2 jumps back to R via an internal switch that looks like it never moves?

I will try without W2 and see what happens.

Thats what i would do first. Then let me know what happens.