in american cars they are actuators but in yours they are servo motors. I've included a pic see if they are working corrrectly, especially the air mix one

Answered by hmac300 (expert)
17,879 answers provided

thanks for the quick response. Is there a way to determine if the problem is the servo or the actual control ****??

Response from jimdonsmith
1 question asked

if it's vacuum turn the control toheat and see if you are getting vacuum. if you are and it's not working then it's the servo.if it's electricyou'll have to do the same but use a test light or vom

Answered by hmac300 (expert)
17,879 answers provided

Ok. I still have no clue. I changed the air temperature control and the problem remains. What regulates the air mix servo? If it is only working from all hot or all cold...then a relay, resister or some sort of module must tell it to stop in the middle to allow the air to mix to "warm". Any information would be greatly appreciated.

Response from jimdonsmith
1 question asked

it's controlld by the control unit that says hot/cold. if it's vacuum it's how much is sent to it and if it's electrical ther ewill b a module inside teh control unit for it.

Answered by hmac300 (expert)
17,879 answers provided

OK....got it figured out. When I took car to dealership to have them repair the ignition switch, they unplugged the thermistor and never plugged it back in. It was located under the driver steering wheel behind the temperature sensor vent. I plugged it back in and it works perfectly. Thanks.

Response from jimdonsmith
1 question asked

Our pleasure. Happy to help. Closing thread.

Answered by rivermikerat (expert)
5,494 answers provided