Quote:
Originally Posted by Mattlock18
Thanks for the responses. So, if I want to check to see if the servo is working, would I just take off the rubber boot and look to see if it lifts the lever when I turn the knob off of zero?
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Yes. If you rotate the knob the motor should pull the lever. You can also try it with the arm disconnected from the lever.
One of the issues with my car was the cables were rusted in the housing. The heat exchange valves can rust closed too.
There are countless threads on diagnosis of this system if you search.