it is set that way. search for the 'changeable tundra electronics' pdf someone posted and it shows all of th esettings. only bad part is that to change it you have to go to the dealer.
or buy yourself a techstream device , hmm. how much are they???

 

Hold the button in for 3 seconds and it stays on.

 

Re: Recirculating air button turns off by itself

the recirculating air button would turn itself off every 3 minutes.

You mean turn itself on? I haven't taken mine in, but they say that it is an option that can be changed in software. I really hate this "feature", I can't figure out why it always wants cold air in the cabin (because it only does it when the outside temp is below 50)

Hold the button in for 3 seconds and it stays on.

That's what the manual tells you to do anyway... It doesn't work. (at least in my truck anyway)

 

Holding the button for 3 seconds keeps the recirculation on with my '07 SR5.

 

All newer vehicles do it... I think it's a safety feature for toxic fumes(i.e carbon monoxide)... Supposedly most can actually detect the fumes, and switch to recirc when gasses are detected from the outside... I believe it opens fresh air ever so often to circulate used air for fresh and to rid of any toxic gasses in the cab...

I also think it helps with funky smells or mildew build up in the AC system...

 

I had the dealer shut off they feature, no charge...you could too, see the attached PDF.

BTW, you really should have searched 1st, we've covered this topic dozens of times...but no harm, just keep it in mind for next time.:ts:

 

I was able to get the "hold for three seconds" feature to work once on my 08' but never again.

 

07 DC, doesnt work for me....sucks

 

3 second hold works for me everyday. 08 DC SR5

 

The 3 minutes hold don't work for my tundra 08, it keep it on for 3 to 5 minutes and the light go off and (fumes and odors from other car come in) I had a 2001 4 runner and don't remember never having this problem, I will take the truck back to the dealership to have them turn it off!!

 

I was able to get the "hold for three seconds" feature to work once on my 08' but never again.

try this, when you start the truck and the recirculation button is off (fresh air coming in) make sure to turn on the heater first before holding the button for atleast 5 sec. it works on my '08, even i turn off the heater after few minutes the light stays on until i turn off the engine.

 

I was just wondering about this, this morning