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What should r-134a refrigerant charged system be leaked checked with?
Wiki User
∙ 11y ago
If you suspect a leak the remaining refrigerant should be recovered and the system should pressurized with dry nitrogen and a bubble solution made for system leak detection.
In the shop, we'd recharge it with R-134a to the manufacturer's specified fill level. Then we'd do a system performance test with the manifold gauge set to determine if there is a deficiency, and to narrow down where it may be. From that point, we'd go over potential trouble spots with a halogen leak detector, including going inside the AC vent next to the passenger side door in order to test the evaporator. There are places in an AC unit and with certain vehicles where the visible bubble test isn't feasible, as you can't see those areas very easily. I would strongly discourage the dry nitrogen test. It doesn't generate the same system pressure as R-134a refrigerant would, and it doesn't carry the compressor oil the same way R-134a does, which could potentially lead to lubrication problems with your compressor.
Wiki User
∙ 11y ago
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