A/C works but as soon as I get to a red light it gets hot?

Hi,

It sounds like it needs to be recharged or the condenser at the front of the vehicle (in front of the radiator) is dirty and the air can't keep it cool.

The condenser looks like a smaller radiator. Check to see if it is dirty/clogged. Spray it off with a garden hose if it appears dirty. Also, take a look through this link and let me know if it helps:

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

I suspect it will be low on Freon which is mentioned in the link. Give that a try if you feel it is a possibility.

Let me know what you find or if you have other questions.

Take care,

Joe