All, I usually rely on the forums for questions about my mustang, but since everyone here has been so helpful answering questions on the stanger, I thought I would ask a quick question about my 02 ford explorer. When I started it this morning, there was a loud clicking sound coming from the dash (almost sounded like popcorn popping) It was coming from directly above the radio. The radio and heat/ac were bothturned OFF which was really strange. After about 5 min it stopped. Any ideas? I thought for sure it was the ac/heater motor, but it was off. Any help would be greatly appreciated.....Thanks!

 

could have been a relay?

 

I just noticed that the rear ac/heat was set to the on position and I didn't know it early this morning. So the heat/ac was running. I am thinking it could be a blend door going bad? Any thoughts??