On my car the AC compressor will run if in the manual mode with the recirculate mode selected. The little yellow LED inside the temp control knob is not illuminated but the AC compressor is defiantly running. Yesterday it was 94° outside and the temp control was set for 72°. The AC LED was not lit but the car cooled off nicely while in the recirculate mode. Anyone else notice this type of AC operation? If it is not hot outside and I am driving in a area with a lot of air polution I want to be able to use the recirculate but may not need the AC as I feel this just uses power from the engine and may lower fuel mileage.