Kia 2004.5 Spectra Service Technical Training page 224

2004.5 Spectra Technology
TRIPLE PRESSURE SWITCH
AND CONDENSER FAN
The 4-pin connector triple pressure switch is located
on the high pressure line between the compressor and
the condenser. It is a combination of a medium
pressure switch as well as conventional low pressure
and high pressure switches. The low pressure switch
is a NO switch held closed by refrigerant pressure, it
will open and turn OFF to stop compressor operation
by interrupting current to the magnetic clutch if
refrigerant pressure is LOW. The high pressure switch
is a normally closed (NC) switch, it will open and
signal the PCM/ECM to turn OFF compressor operation
if refrigerant pressure is too high by interrupting
current to the magnetic clutch.
The medium pressure switch is a NO switch and will
close to turn ON at a medium level pressure (220 PSI)
to prevent the A/C system from overheating, and
open, turn OFF when pressure is below 164 PSI.
Heating, Ventilation, & Air Conditioning (HVAC)
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