Hi,
I am replacing old honeywell thermostat with rth230b model.
There are 6 wires comes from the wall. I have connecterd GYW and R to Rc.
Heat works fine. Then AC starts fan works but outside unit do not start up.
Looking at the wire diaramm looks like one I need power to Cool relay which means
Either blue or orange should go to Rc and existind R should be moved to Rh.
What should I do? Thanks