Would putting an auxiliary fan on the aircon condenser(?) (that mini "aircon radiator" in front of the big engine radiator) help improve the cooling? The only fan my truck has is the big one which is attached to the engine, behind the radiator.

During noontime, it takes a considerable amount of time to cool the interior, especially if the auto has been left on the open.The aircon has just been cleaned last summer, and though it was colder, it still couldn't beat the noontime heat.

I got the idea of putting an aux fan from another car forum, but couldn't find any further discussion about it.