Does any body know why?

For the life of me I cant figure out why when you turn on the heater the A/C buton comes on. My 2007 4runner does the same thing?

 

A/C doesn't always mean cold air.

 

It does??? Hmmmm, now Ima have to go look at my truck and see. I dont think it does though?

 

mine doesnt unless I turn it on. just hit the ac button to turn it off

 

I hated that and took care of it during the 1st week I owned the truck. There is a wire you can cut (AC MOD) that will just let you only run the AC (compressor) when you push the button.

Do a search for it..

 

Exactly, just hit the ac button, and the light goes off

 

What is the position of the air mode switch when this happens? This is the switch on the far right.

Edit: the 2009 and 2010 models are different from older Taco's. The newer trucks have logic to automatically control fogging and I'm guessing that is the OP's issue.

 

I've never had that happen. When you say the a/c button comes on do you mean the air conditioning actually comes on or just the a/c button lights up?

 

exactly. I always run my AC in the winter time with the heat. It keeps the windows from fogging up. I have done it on every vehicle I have ever owned. I really can't tell the difference in heat when the AC is on vs. off.

 

LOL! Just press the A/C button and it will turn off.

 

F*** boys...push the little button that says A/C.. its the round thing under the dial

 

Seems like everyone thinks this!! And I would have to agree, seems to me that you just have to push it and it should just turn off.

 

I just learn't this from the salesmen. Driving for 30 years and never new that, but it works

 

It comes on an every position except defrost?

 

Just the light I think.

 

Thanks!

 

X2