The slide shouldn't have any resistance--it's electronic. If they tried to replace the actuator and it still won't work, then the blend door is broken. It's only made of plastic and is common for them to break. Just had a friend talk to me tonight actually about the same problem. Local garage in small midwest towm gave $1000 estimate. So depending on where you are, that's not too far off.
Dave
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Tuesday, December 20th, 2016 AT 6:13 PM