I that vacumn line breaks, or you eliminated the valve like I did, you get coolant flowing to the heater core all the time. The later XJs don't even have a heater valve. The blend door inside the dash should still be routing the air flow around the heater core though. This sounds more like a blend door problem.
Thats the same problem with mine... Ive kinda learned to deal with it but jeez it gets so hot in there, its like the air is always on and its always hot and it feels like its coming out of the "foot" vents...
Thats the same problem with mine... Ive kinda learned to deal with it but jeez it gets so hot in there, its like the air is always on and its always hot and it feels like its coming out of the "foot" vents...