Contour Enthusiasts Group Archives Forums General Troubleshooting A/C doesn't cool unless moving

Belt slipping would show up as squeal, so that doesn't appear to be your problem. A/C does shutoff to prevent stalling but I don't think that's your problem either.

I would start with car cold, by turning a/c on at idle and confirm that rad fan goes on and that compressor clutch engages and disengages, i.e. cycles while car is sitting there cooling.

We have to go to licensed a/c people here for leak test before recharge so I can't really comment on your DIY kit as I'm not familiar with them. "Adding a little" doesn't seem to me to mean the same as having the right amount, and more isn't better than the right amount as far as a/c goes. I would therefore think that check of refrigerant would be in order if above checks OK.

p.s. Just saw your simultaneous post. Max a/c only affects air circulation, not amount of cold.