Ac not cold when Idle

[shady090]

2014 LR4

I am noticing that while at idle, the Air condition is not blowing cold, once I start driving it gets good and cool.

I do have the GAP tool , but not exactly sure what I should be looking for. My first instinct is maybe its a little low on refrigerant, but I do see other people saying it could be overfilled, problem on low pressure side etc.

Anyone have any tips for me to help me diagnose this?

 

[Rover Range]

If your motor mounts are collapsed. The cooling fan will rub on the shroud and barely turn.
If that's the case, remove the brush looking part on the shroud.