Air Conditioner stays on.

My air conditioner will not deactivate. I'll have the air condition button turned off but it will still blow out ice cold air. I do a lot of city driving and having the air conditioner always on isn't that great on my engine or gas mileage. Please Help me! How do resolve this issue?

Thanks!

Have you checked the switch, it may not be disconnecting?? Have you cisconnected the A/C compressor?

Is it on front defrost? Running the defrosters will turn on the compressor.