INFICON TEK-Mate Refrigerant Leak Detector User Manual
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8. An apparent leak shall be verified at least once by blowing shop air into the area of the
suspected leak, if necessary, and repeating the check of the area. In cases of very large
leaks, blowing out the area with shop air often helps locate the exact position of the leak.
9. Leak testing of the evaporator core while in the air conditioning module shall be
accomplished by turning the air conditioning blower on high for a period of 15 seconds
minimum, shutting it off, then waiting for the refrigerant to accumulate in the case for time
specified in step 10, then inserting the leak detector probe into the blower resistor-block or
condensate drain-hole if no water is present, or into the closest opening in the HVAC case
to the evaporator, such as the heater duct or a vent duct. If the detector alarms, a leak
apparently has been found.
10. The accumulation time for evaporator testing is 13 minutes.
11. Following any service to the refrigerant system of the vehicle, and any other service which
disturbs the refrigerant system, a leak test of the repair and of the service ports of the
refrigerant system shall be done.
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