DIY: Replace Servo Sub-Assy

46runner · 2018-11-28T15:18:24+00:00

Symptoms: 1.Ten seconds of fast clicking noise (so fast it sounds like buzzing) from the dash area upon starting the car 2.Fan only blows through front vent. No air being blown to windshield or to feet vents 3.Fan temperature doesn’t change I decided to replace: SERVO SUB-ASSY, DAMPER (FOR MODE) 87106-35120 Controls where the air flows from (vents, defrost, etc). Under the glovebox, mounted on the center console, top position SERVO SUB-ASSY, DAMPER (FOR AIRMIX) 87106-35180 Controls the fan temperature Under the glovebox, mounted on the center console, bottom position Update: Post #12 offers a tip about accessing some of the screws for easier removal of servo. Posts #41 and 42 have pictures for drilling a hole to access the difficult screw. continued in next post...

Thread starter 46runner
Start date Nov 28, 2018

missionman

Member

Sep 6, 2025

88Center said:
Just finished replacing mine. One back screw caused a massive headache.

But to save others from possible headache, I did a clean writeup here.

Works like new now.

Replacing AC Servos / Actuators

THANK YOU for this. Helps a ton.