[V8] AC Failure II

[Scott Baumann / Progressive Technology Solutions]

Hey all.. I ran the fault program on the CC head unit.  Under section 01, came up with 09 and 166. 09 is a temp sensor and 166 is the high press switch (cutout?).  I checked the field relative to qty of AC Compressor cut-out due to high press switch since last ignition.  qty = 1.  Seems to point to the high press switch, whatever the heck that is.  Is this in the freon circuit?  Any BTDT;s on this stuff??

THanks

SB