[gunforhire]

Greetings everybody. I'm new to the forum and was wondering if one of you well edu-macated jeep fiends could lend a hand.

It's starting to get cold here in the northeast and 94 YJ is having some heater issues. Specifically, when I set the heater to ‘warm’, well, it’s just not that warm. That aside, it also seems that whenever the heater is on, my transmission (3 speed auto) gets finicky and has trouble engaging from a
dead stop.

I guess my question is, does the transmission have a vacuum control that might be linking these problems or are these unrelated?

Digging around inside the dash board I found what CHILTON calls the ‘Air Door Motor Switch’. And I noticed that this is a three pronged vacuum port, however mine only has two lines connected. Is this intentional or am I creating a vacuum leak that is giving me trans. trouble when I turn on the heat?

Any thoughts are greatly appreciated.