HVAC stuck on defrost constantly blowing heat

Hello,

This could be a problem with your defrost actuator. Over time your vehicle's actuators, which are little plastic gear driven motors, through normal wear and tear will wear out. When an actuator finally fails, if it stuck in a position, that is where it will stay. Your defrost actuator, it sounds like got stuck in the open position when it failed.
I have included a link for you to go to down below:

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

It is a helpful guide for your vehicle's condition. I have also included vehicle specific factory repair and replace instructions in the diagrams down below. Please go through these and get back to us with what you find out.

Thanks,
Alex
2CarPros

I was thinking so. Most are called Blend Door actuator but I also thought it might be my heater core valve and one of the door actuators. But I’m going to attempt to take out the blend door actuator to see if It’s stuck and then see about my other theory.

Hello again,

The temperature blend door actuator could be sticking as well. I have included a factory diagnostic guide to pinpoint the problem in the diagrams down below. Please go through it and get back to us with what you find out.

Thanks,
Alex
2CarPros