I tried recharging my A/C a few times and it went straight into the red?

Hi,

What are you using to recharge the system? Are you certain you are attached to the low side?

Do me a favor. Take a look through this link and let me know if this is how you are recharging the system:

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

If that is what you are doing, we need to get a manifold gauge set and check what the pressures are on both the high and low sides.

I suspect they vacuumed the system to determine if there were no leaks. It can hold a vacuum, but there can be issues with the compressor or something could be blocked. Take a look through this link to see how manifold gauges are used in a vacuum/recharge.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

If you have a gauge that goes into the red, be careful. Excessive pressure can cause the can to fail.

Let me know.

Joe