Hey guys, I think i have the answer but want to make sure before i go tearing through more stuff under my dash, I just replaced my Compressor, drier, and expansion valve on my 76 XJS, before doing so i removed my heater valve and bypassed my heater core, by doing this i removed the vacuum hose that went to the heater valve, and forgot to plug it. Once i Pulled my vacuum and recharged my system, i noticed i had a supply temp that would not go below 75 degrees, so i checked and found my fresh air intakes open, i shoved some plastic bags to temporarily cover the intake and boom 42 degree discharge temp. ( i,m thinking the vacuum line i removed off the heater valve also controls the fresh air dampers?????? ) and if so i can just cap that vacuum line, Ey or Nay. Thanks