While ac is on and the idling gage goes up even while in park
I have a Nissan cube and when turn the ac on the
idling gage goes up even while am in park want to
know what's the reason
You are very observant. That is normal for the engine to speed up about 100 rpms when the A/C is on. This allows the compressor to turn faster, cooling system to run cooler and to help the engine better handle the extra load.
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