Heater issues/cold air issues

[xcalbr2]

Hi all and early Happy Thanksgiving!
I have a 2012 Limited with 122xxx and the automatic dual climate control.
Last winter I had more heat than I could stand with it set on 69. This year seems to be chilly air even on 77/78 and its not that cold out yet.
Feels like I am getting too much cool air in the cabin.
Anything you can recommend I check? I did a forum search for heat and didn't find much that was relevant.

I did have the pass air bag replaced early this spring and not much heater use afterwards. Also had Radio out about a month ago to install accessory mount.

Coolant is not low, flushed out by Toyota early spring, engine temp gauge seems to be running where it should. If turn heat to HI or 80's it will get plenty hot but still seems to me to be a draft on drivers lower.
Thanks
X

 

[flyrv9]

I think you have to figure out how the system works. By that I mean systems where you can set a temp in degrees, have control programs that use sensors that tell a computer to make adjustments to keep the temp where you set it. Perhaps previous work like air bag replacement created problems. A connector could have been left off or similar issue could affect how the system functions.

Our SR5 doesn't have the ability to set the temp in degrees, so it's pretty basic. The other causes could be a duct (removed for air bag replacement or other service) or a blockage (check cabin air filter) there have been reports of leaves and other stuff found in the filter area. I'd also scan for codes - sensor failure, etc.

 

[08TxRunner]

Check the blend door servo.

 

[xcalbr2]

hvac

Any more info on that?
I see stuff for 4th gen but not 5th...

 

[xcalbr2]

bump

Bump
any more info/ideas

 

[Jivewalker]

stuck thermostat

 

[Tyjgordon]

Similar-ish issue

I have a 2011 sr5. Passenger side has no heat. Have the dash broken down and and blend motor seems to be doing everything it’s supposed to do for each blower setting and temp setting. The passenger side isn’t getting any heat from the core it seems but drivers side functions completely normally. And passenger side has cold ac.