Go to the dollar tree and buy a couple things: a pump spray bottle full of your favorite flavor of awesome cleaner and a couple bottles of Spiderman bubble juice. Dump some awesome out of the pump sprayer and refill with a bottle of Spiderman. Spray thr crap out of everything that contains refrigerant. Connect low and high side to manifold gauges, open both valves, and pressurize to big dog psig (250 plus). Keep spraying and watching. If you want, use a sniffer, just don't spray it with soapy water.
If you still can't find the leak, you will have to isolate parts of the circuit and test them separately. I like flare fittings. If you're lucky, the first part you check will leak. If not, it will turn out to be an o-ring or Schrader valve.
|