Hello,
The best option would be to replace the blend door actuator.
The actuator moves a certain amount to change the hot and cold air flow. If you want to manually change it, it will likely require removal of the HVAX box and disassembly of the shrouds to move the air door. Also, you will have to make sure it does not go back to the previous position, as it might if the actuator is still attached and stuck.
https://www.2carpros.com/articles/replace-blend-door-motor
I have attached diagrams for the actuator replacement procedure below for your reference.
Please let me know if you have any questions.
Thank you.
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Friday, February 11th, 2022 AT 9:26 AM