I have a 1996 Park Avenue with 100k miles that runs great and is super comfortable. Currently the climate control seems to be doing nothing, no heat, no a/c, no blower, nothing. I think it is the control head. Other weird electrical things occur that defy explanation. Sometimes the dash panel lights go out. Sometimes after sitting in the car with it off for several minutes, the interior lights come on. The headlights are almost always on in the day but not always. Any thoughts. Thanks

 

You might have someone run a health check of the BCM, body control module.