And not knowing where wires go. Know where wires are conneccted and there colors on the circuit board in blower unit. But I do not know were they are connect to the thermostat to corresponding letters. I have the RTH7500D, this is replacing a TH3210D1004, I have a Heat pump unit.

Post what wire is hooked to what on the control board and we can tell you where to put them on the stat.

Off the circuit board; C-Blue, R-Red, G-green, Y/Y2-yellow, O-Orange, W1-white, W2-Brown,Y1-nothing.

Need to connect to C, G, Y, O/B, AUX, E, L.

c= blue
r= red
o= orange
y= yellow
aux=white
e= brown
g= green
L= not used

Thank you AC tonight

Ok, gave up last night. Plowing hot air, when on cool and nothing when on hot. Nothing works when I shut the breaker off on panel for the heater.

What is crossed that I can change?

Are you saying you are getting hot air when you turn the ac on? Did you set up the installer setup to energize the reversing valve in cooling or heat?

Yes. I'm not sure as to what your ask, but if you mean programming the thermostat for Cooling, then yes, other?

Installer setup
#170 needs to 7
# 190 is the heatpump changeover. If it is a newer heatpump needs to be set at 0 if old needs set at 1

http://customer.honeywell.com/techli...0s/69-1730.pdf

AC up and running and getting cooler (90'o were in Florida), thanks again...

That's great! Glad you got it going. What ended up being the problem?