XC90 Volvo air conditioner does not cool well at idle
Have the pressures checked, this sounds like you don't have enough airflow through the condenser, could be plugged with dirt and bugs.
I just remembered a vehicle that was in my shop some years ago that was the same thing and had correct pressures anyway to make it short I added another electric pusher fan than came on with the compressor and that cured the problem at low speeds.
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