This winter I installed honeywell rth230b. Heater works great, but I have no a/c. I have 6 wires from wall.
Rh--red
Rc--blue
W--white
Y--yellow
G--green
Brown not being used
Help it is 90 deg. I need my a/c
Thank you all

Is your heating system a gas or electric or a heat pump??

Lennox elite series gas heater and lennox a/c unit

I suspect that you run a jumper wire from RH to RC... then turn off the power to the AC unit and have someone stand outside by the unit and you switch the thermostat to cooling and see if you hear a deffinate click at the outdoor unit. Is so that means you are activating the contactor and if the power was on the unit should run. Now turn the thermostat back off, turn on the power and then the thremostat back to cool and check things out.

Thank you for your help. Ran a jumper wire and we are blowing ICE CUBES. My wife and I thank you for your help