Jessie I had a 91 grand caravan. It had one leak after another. Replaced evaporator, expansion valve, then the steel lines going to the rear evaporator had many pin hole leaks, then I got rid of van. It became a money pit after 15 years and 150K.
I have seen so many AC, dehumidifier, refrigerator and heat pump leaks, it's hard to say where you will find them.
I've concluded that anything that has freon it it, if it doesn't leak, just wait, it may leak tomorrow. I sometimes think some leaks are caused by the very thin, cheap copper and aluminum used. Then sometimes, it's gasses like 410a that run at such high pressures.
It's no wonder the HVAC people make a good living with service calls. It reminds me of the old TV repairman making service calls to replace vacuum tubes.