Yaris 2010 Blend door actuator part number

[moozart]

Originally Posted by moozart

I used the TechStream and managed to find the following code:

B1421 Solar Sensor Circuit (Passenger Side)

I also noticed that now always blowing hot air, and when the AC is on, it is colder.

Does anyone know if I need to disassemble the dash to replace it?

Thank you!

Just learned when you scan on a dark place this code can appear. After reset and trying on sun light it is gone.


But this problem is getting me crazy. I noticed when fan speed is low ( up to 4/10) it blows cold. When I set the fan speed to max it blows hot. But then even reducing to low fan speed, it blows hot still. Then I need to restart the car in order to have it cold again.

What is funny is when fan speed is above speed threshold (4/10) I hear a muffled noise and it turns immediately hot. As If the mix air damper shut and lock


I'm starting to think I have a bad control unit (my is automatic). I'll go to a shop next week.