I've searched through the site and came upon this thread:

https://www.yotatech.com/forums/f2/h...oubles-121377/

I've got a '99 Runner SR5 Limited, lights on the climate control are off, no response from A/C button. Mode button works sometimes (sometimes have to push the hell out of it). I've noticed the unit seems to "reset" if I disconnect the battery. This allows me to push the A/C button to turn on or off but only for a few seconds.

Has anyone rectified this problem with a sensor replacement or do you have to replace the whole unit? Thanks, love the forums can't wait to do some fun stuff to my Runner!

 

go to ebay and type in item number: 380295604236 or check their website: http://www.autoecu.com/

I just used their rebuild service for my climate control on my 99 limited and it works like new. For the money you can't beat it and the turn around time was unbelievable. Much better than buying a used unit and it cost me around $140. The service came with a lifetime warranty!! Heck of a deal!!!

Removing the climate control is a breeze. I have some step by step instructions. If you need them let me know. email or pm me.