Servomotor from hell

Surprise!! found this place by google B1441 and B1448!
I have the exact same issue with my Prime 2019, precisely the same situation! The dealership Tustin Toyota asked for $3,000! Sucks! Prime suddenly started to blow high temp hot air 2 weeks ago! nothing wrong with the compressor and 134a！


I love this topic!
Servomotor from hell

 

And now me, too. 2019 Prius, B1441 and B1448, dealer wants $5000 to disassemble the entire dashboard and cooling system, including draining the refrigerant from the system...

JacobPrime, did you ever get yours fixed yet?

My wife wants me to just bypass the engine coolant around the heater core so it can't blow hot air anymore...

 

I managed to replace the #2 radiator damper servo without removing the dash and the entire heat/cool unit. A YouTube video pointed the way with a tool recommendation for a long, tight space, right angle screw driver. Still a tedious, difficult remove and replace. Not for easily discouraged folks. The good news is that my total cost, tool and part was about $150.

I took the old unit apart. The servo motors were easy to test and both seemed to be fine. There is a third component that seems to simply follow the motion of a large gear and connected linkage external to the servo unit. My best guess is it’s a position sensor of some kind? Does anyone know? It’s the wheel with 2 connecting pins that spins freely in the servo housing when not installed. The servo motors seeming to work fine in the old unit was a surprise and I’m wondering what the fault was as the system works perfectly after the replacement.

thanks! Love this forum.

 

We are also trying to replace this part and found the YouTube video. We bought the long tool (usually for motorcycle carburetors!) Have the correct replacement part from a Toyota dealership. Definitely not for the faint of heart! The screws are in so tight. And the torque on the tool is minimal. Any pointers on how to get them out? Thank you and thanks for this fantastic forum!