Originally Posted by harlan_husker

I replaced my old mercury thermostat last fall with a honeywell rth230b digital model and furnace worked fine all winter, now that I am trying to use my air conditioner its like the thermostat does not recognize cool. I have 4 wires two red and two white, one of the Red wires I have plugged into RH and a jumber between RH and RC, then a white in W and a white in why and the other red in G. I can turn the fan on but the cannot get the actual air conditioner to turn on. Do I need to move the red from G to RC and discard the jumper?

Thanks much.