Unfortunally you need to remove the entire dash assembly in order to gain access the the blend actuator. Consider replacing the heater core while your in there only because the amount of work involved to do it later if it should leak.
Remove the dash assembly to gain access to the blend door actuator.
How do I locate the heater blend door actuator in a Ford f150 pickup
how to replace a blend door actuator on a 1999 ford ranger
The entire dash assembly needs to be removed to gain access to the blend door actuator. Big job, suggest acquiring a shop manual of you plan on doing this job yourself.
How do i replace blend door motor
The blend door actuator can go bad. Big job to replace it. Dash assembly must be removed to gain access to it.
locate blend door actuator for 1997 pontiac bonneville se
Probably a faulty blend door actuator. Remove the glove box to gain access to the actuator. Replace the actuator with a new one.
Where is the blend door actuator on a 1998 Sonoma
where is the defrost/floor door actuator on 2002 chevy trailblazer
Get scissor doors.
You don't!