A/c

A/C leaks. Can't find where the leak is. Mechanic wants to replace entire system. Can anyone help me locate the leak. Don't know where the lines run in the rear of vehicle.

Inject some dye in it and use a blacklight. If no results, use a sniffer in the vents, in case the leak is in the evaporator. I'd say your mechanic just wants more money, or doesn't know much about A/C.

Also, what year is it, and how much/how fast is it leaking?