I have a 1998 XJ sport with AC. The defroster door slams closed when I turn the fan speed up beyond low speed. All the other doors and controls seem to be working fine for all the other settings. I see no issues with the vacuum system. I presume the door or a lever is disconected or broken loose from the controling diaphram unit. Is this a common problem and Any easy fixes or tear the dash out when spring comes??

Also is the 98 XJ subject to the same intermitant spedo-tach-airbag light issues as the 99's I did a search and I see lots of info for the 99's but not so much for the 98's. My 98 never displays the no buss code. So far a slap on the dash or usually wait a minute and it fixes it's self. Also no problm with starting or running so maybe not related to the crank sensor
Thanks for the help.

 

Duck tape

 

With all the talent and experience and knowledge in this group I hoped a few people would offer some help or possibly links to helpful posts or threads. If I posted my question wrong or in the wrong place I would appreciate that information too so not to do it a second time.
Thanks