What I am trying to say is that my unit has a switch on the in house unit that we switch to heat for our heating needs then we switch to air for our cooling needs. They are not controlled by the thermostat only when the heat is switched on the thermostat only controls it & not the air but when it is switch on the unit itself for air the thermostat controls the air only. So my question is what is the color of the wire that is for the cooling to run where it will cut the system on & off to go in the RC cause all my wire colors are red yellow blue green white? Cause my system will not shut off if I have it switch to the cool & it does shuts off if I put it on the heat that's on the thermostat then no air at all. Can someone help me clear this up where my air will work coming off & On with the cooling switch on the thermostat?? We don't have the rc hooked up it is also showing a red wire should go there too but I only got 1 red wire & that's in the RH! Please help??

Most times if your system has only 1 transformer you need to put a jumper from RC to RH which gives you power to both heat and cooling ,whichever you have switch on tstat set for