Problem: The vehicle owner complained that
the air conditioner was not cold enough.
Details: The technician verified that the
vehicle was equipped with a dual-zone system. The air was cold
coming out of the passenger side vents, but not on the driver’s
side. He connected a scan tool and found no diagnostic trouble
codes. A quick call to ALLDATA Tech-Assist resulted in some
interesting experience-based advice.
It seems that these dual-zone systems will cool less on one side
or the other when the refrigerant is low. The Tech-Assist
consultant suggested verifying if the refrigerant level was
correct. If it was not, he advised to inspect the high-pressure
line from the compressor to the top right corner of the condenser
for leaks; a problem the consultant had noticed happening more
often with these vehicles.
After connecting his A/C gauges, the tech found that the
refrigerant level was low. He added dye and checked for leaks. As
predicted, there were traces of dye at right top of the A/C
condenser, which indicated a small leak.
Confirmed Repair: The technician recovered
the refrigerant, replaced A/C condenser and recharged the system
with the correct amount of refrigerant. After the repairs, the
A/C cooled equally on both zones. Fixed!