Rear AC alarm false triggers

[patricktokeeffe]

Current approach for detecting AC freeze-ups only works for summer. During winter/spring/fall there are false alarms when the AC is not running at all

    If (rear_AC_T < 19) Then
      prog_status = "WARNING rear AC setpoint too low"
    ElseIf (rear_AC_T < 15) Then
      prog_status = "ALARM rear AC at freeze risk"
    Else
      prog_status = "OKAY"
    EndIf