The Informant Refrigerant Leak Detector
14
Instruction
0019-9210
• At each area checked, the probe shall be moved around the location, at
a rate no more than 25 to 50 mm/sec (1 to 2 in./sec), and no more than
5 mm (0.2 inch) from the surface completely around the position. Slower
and closer movement of the probe greatly improves the likelihood of
fi
nding a leak.
• An apparent leak shall be veri
fi
ed 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.
• 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 an addi-
tional 15 seconds minimum for the refrigerant to accumulate in the case,
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 heating/ventilation/air conditioning case to the evaporator, such
as the heater duct or a vent duct. If the detector activates, a leak appar-
ently has been found.
• 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.
Operation