i have an 83 300TD and one of the center vents is blowing very hot air, and i can't seem to make it stop. around the dash also feels hotter then normal i believe.

last night i did a valve adjustment and i'm wondering if i knocked something that controls that? for what its worth i noticed yesterday i had blown a fuse on my horn too...don't know if that matters but thought i'd mention since its an electrical issue.

about to go on a long drive and hoping that coolant is circulating correctly and that the car won't overheat....

any thoughts on what i should look in to?