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Old 06-21-2001, 11:13 AM
Posts: n/a
If it is holding a charge the leak test is unnecessary, however, as Steve said the filter/drier should be changed and the system evacuated with a strong vacuum for a period of time. If the technician at no time used a vacuum pump, the system is marginal at best.

If the equipment is available to him, it would be best to remove charge into a machine so that the R12 is not lost, replace filter/drier, draw a vacuum with a wet vane vacuum pump for a period of time, recharge with R12.

The gross leak test I described was merely a "poor boys" test of the system to see if there is a large leak in the system before wasting refrigerant into a system that has a large leak.

Good luck,
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