My furnace works fine but it won't turn on my Air conditioner unit outside. Everything on the inside unit is new. I have installed a new capacitor and solenoid on the air conditioner out side and still nothing. I have also installed a new thermostat. I need help and fast it is supposed to be over 100 today. Even the heating and air guys can't figure out what is going on. Oh and this is the 3rd circuit board I have installed with no luck