A/C not blowing cold when stopped - 37663B Black Knock Down Grille Guard Dodge Ram 1500 200

Maybe the clutch is slipping on the compressor.

TO MANY REASONS FOR IT TO QUITE WORKING IT WOULD BE BEST TO LET SOMEONE LOOK AT IT

Low freon will cause the compressor to short cycle, when the compressor runs the pressure in the low line is pulled down and the low pressure switch turns it off. Not running the pressure builds up and turns it back on. In the old days there was no low pressure switch, with no freon to carry the oil the compressor was destroyed.

I can't say much without having the actual code.
When the ac stops blowing cold at idle, the most common reason is not enough air flowing thru the radiator, or the radiator fan is not running and the only air flow is when the vehicle is moving.

One of two things has happened. Either your coolant has gotten really low (easy enough to check) or you heater core is starting to plug up.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

check the freon charge for the a/c system to low can shut off the cutch

Is the compressor cutting out? It could be the compressor clutch relay is going bad.

If it happened all of a sudden, check the fan belt, and the A/C fuse. These are the most likely culprits. If the fuse is blown, the clutch on the A/C compressor may have gone bad, and should be looked at.

AC system appears low on charge

sounds like you have a minor vacuum leak in the system or a weak blend door motor. Your a/c is responding to engine vacuum changes.