I know my Wrangler over time slowly the resistors burn out in the heater box, it starts loosing the lower speeds, I have changed out two of them over the years.
Thanks for the advice, guys. I saw that I could get the resistor for $9 online but I didn't want to wait. - $25 at the local NAPA. Works great now. One more thing off of my 'to do' list.
While I was at it I noticed that my dome lights wouldn't come on when I opened the doors. I checked and saw that the interior light relay was missing. - Put in a new one and things are back as they should be. I noticed that the relay also controls the door buzzer. I suppose someone pulled it to get rid of the noise.