Car Air Conditioner Servo Motor Disassembly & Repair 

Thank you

You might need to see if the evaporator has been clogged. Cleaning it will make a huge difference in cooling.

The same as I have. AC delays when start up for 45 second. This arose after replacing rear AC and amplifier (both are used parts not new). These codes appeared: B1447 Air mix damper control servo motor circut (Rear) B1443 Air outlet damper control servo motor circut. Could you help me?

@@bujabal76 Hey, in my case it was the mechanic's fault who put the servo motor back after cleaning the evaporator. I believe the car's ecu checks for the whole 45 seconds why the problem is occuring and then finally bypasses the checking process to run the AC. I took my car to Toyota and the technician told me that the mechanic who worked on my car did not align the gears of the servo motor with the flaps's arm. After the Toyota technician did what he had to, the problem is gone. The AC starts right up. Also, the servo motors on Toyotas are made by Desno and so they do not fail that easily. I would advise you to check whether your servo works when you switch from Recirculation mode to fresh air mode. Try to listen to a flap opening when you do so. You will feel a sudden decrease in air flow through the vents as well. If you hear a noise but with the flap not opening, you have probably been affected by the same problem I had. Take the motor out, dissassmble it and clean the interior of the housing keeping in mind the position of the gears and motor polarity. Check it this works. If not, then you might need a new servo motor. I wish you good luck, friend. h

@@sauravparashar8016 Thank you for the explaining this clearly. I have done as you said but no noise coming from the dash. I doubt the technician has missed to put back some wires for the servo motor when he was checking for the issue that caused the AC to failure. It was a bad amplifier

@@bujabal76 I am glad that you sorted the issue out. Cheers!

@@sauravparashar8016 Thank you for your contribution. My vehicle had a 45 sec delay before the AC system starts up. Following your guide, I took the vehicle back to the technician and he was able to align the gears of the servo motor with the flap's arm. AC system now ready for operation immediately the vehicle lights up. Grateful.

Nope, servo just controls the direction of the airflow through tunnels, Like it acts as a valve to opening, closing, and changing the flow direction. Maybe your evaporator inlet is blocked (Outside Air Inlet).

@@LahisTechLT ill look into that, thankyou much!

@@aquamayne8168 In my case, it was a clogged evaporator. But now, after I cleaned it, my servo motor is messed up.

@@sauravparashar8016 if your car is newer Lexus should have sent you a letter in the mail for servo motor going bad too soon, and will repay the xost it takes to fix it. I would reach out to Lexus dealership and see if your car qualifies

@@aquamayne8168 It’s a 2009 Corolla that I have. And so, my luck has just run out! Haha

It was lubricated using silicone grease. No need to lubricate it with too much of dielectric grease that's why I wiped it out the excessive. Thank you for the comment.

Toyota Sai

It worked.

@@LahisTechLT The bottom servo lever didn't even move?

@@jjack6896 it worked, I was unable to change the "A/C MODE" while filming to show that the servo lever movement. Sorry.

was kind of moving with hands the lever?

@@LahisTechLT hai.. which button should i press to test lower servo moving?the video show upper servo was functioning.. how to test lower servo was working..?Tq in advance

Spray wd40