According to William Wolanin, these are steps for detecting leaks.rn1. Perform a quick soap bubble test to spot easily found leaks.rn2. Pressure test the system with nitrogen for audible signs of a leak and then fix the leak conventionally, if it's accessible.rn3. Perform an electronic sniffer test.rn4. Use a halide torch test.rn5. Inject dye and use an ultraviolet light test. Next, here are his tips for working with sealants.rn1. Recover the refrigerant with a refrigerant recovery machine.rn2. Replace filter/driers.rn3. Evacuate the system down to 30 microns with arnvacuum pump at least two times to boil off any moisture in the system. "I use a micron gauge because it's more accurate than refrigeration gauges, but it's not mandatory," said Wolanin.rn4. Recharge the system with refrigerant.rn5. Inject the sealant into the low side after first evacuating the charging hose of possible contaminants. System refrigerant rushes into the vacuum-packed sealant can, mixes with the several ounces of sealant, and transports it into the system.rn6. Run the system. The sealant stays in a liquid state before bonding from atmospheric moisture only when leaving an exit hole with the escaping refrigerant.rn7. Check system pressures. If possible, return after a week to check system pressures again.
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