I own a 97 v6 mustang convert. I was driving home last night when my heat suddenly turned cold. At the same time, the lights for the heat control knobswent dim and the blower seemed to have gotten slightly louder. The car didn't overheat and drives fine, just w/o heat. If you guys have any ideas for me, I would really appreciate it. Thanks

 

When mine did that it was the heater core.