Thanks guys
Matus your summary of my situation is correct. The AC is does not require to be on for this to happen. The engine revs will rise if only the internal heater fan is on the first setting, not necessarily with the AC on.
just to eliminate the idea that the car is drawing more power so requires to rev higher. I can turn on every electrical device in the car (Rear heater, front defog, heated seats, radio, window wiper defrost, lights) all at once and the car will still not require to idle any higher. As soon as the internal heater fan becomes active the revs rise.
I have heard that some of the motor manufacturers are examining the idea of using the same electrical wire to perform or manage different pieces of equipment by using different frequencies and pulses. Could this be one of the problems of cross talk over differing wires or am i on completely to wrong track?
I am a little concerned that i am going to encounter problems in the summer when the car is trying to cool itself down and the engine is reving to high.
Kevin