AC button doesn't turn off AC

I have a 2012 Tacoma. AC will not turn off by pressing the AC button. The temperature setting doesn't change at all to hot air. Changed the clutch relay and heater relay, checked all fuses, replaced the module that houses the fan switch, ac button, etc. The ac does shut off when turning the fan off. Any ideas? Thanks.

 

Sorry but I have to ask, is the turn dial set all the way to the left? Because that’ll stop the ac button from turning the ac off.

that and having it on defrost.

 

No. I was aware of this. I have changed all of the settings on the panel and they function correctly. Except the button and the heat settings.

 

It sounds like you may have a faulty HVAC climate control unit.

 

Could be as simple as a bad actuator.
The temperature actuator can be seen by removing the glovebox and floor duct, the duct is a little tricky to get off but pretty easy once you figure it out.


The notch on the actuator shaft should line up with the mark on the actuator body as shown in the picture below.


Recirc door should also be open as shown with the recirc button on.

Closed (Recirc off)


Open (Recirc on)


Also check and see if the suction line (see picture below) is cold (truck running, A/C on high), if it isn't or is barely cool your either low on refrigerant or there's another problem in the refrigeration system, at this point you will need someone with gauges to hook up to it and diagnose further.

 

Got it, just checking

 

Thanks for the info and photos. I will check this tomorrow.

 

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