re: Home AC Troubleshooting Question

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There is a product I've seen work before. Its called EZ Seal. Its about 50 bucks, you put it in the freon. If you have a small leak, it will seal it. If its a big leak, no helping.

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works like a charm on fridges too.

I loved that stuff.
Explain to the customer "well you have a leak, I need to vacuum out the refrigerant, solder in valves, fill it with nitrogen, find the leak then replace the offending parts, then refill with 134a and then seal. "

or... I can use this syringe.
I was worried about it clogging a capillary tube, but the first unit I fixed with that stuff is still doing fine over two years later.