I've looked around on the internet and cannot find anything that is helpful. I have a 2003 tundra and the fan control knob just broke off the other day. The plastic square piece behind the knob was cracked, I glued it back together, but am unable to secure it in place. When I put the knob back into place it still has a lot of play and comes straight off when pulled. Any idea of a fix? Can you just replace the knob or do you have to replace everything? I would appreciate any advice.