[hesparza]

I have a 2001 Highlander and my wife has been complaining about the heater not working for a while now but everytime I used it, it worked. I had to turn the nob a few times but I got it to work. Then this morning I decided to drive it to work and sure enough the heater worked off and on. Air changed from hot to cold. After reeding wizzers comments, I remember I took the nob off 1 time and found the nuts were loose. I tightend them but nothing changed. I can't wait to get home and remove the panels to look for the wires. Thanks for the info and I'll post back when I'm done if I had success. Great details and thanks for the images posted Wizzer. It makes it easy to see what I'm going to remove and work on.