My gfs dad has a 1999 Toyota 4runner limited edition, and his HVAC unit does not work. The only thing that works is the temp setting. The AC/Heat is always on, and the only way you can turn it off is if you push down really hard on the "OFF and Mode" buttons at the same time, and it takes a couple of tries 2 even get it off.. Any one know what the prob could be or any sites that sell that unit for cheap?

Heres a pic of what i am talking about, i took it off the internet.