Automatic Temperature Control: Adjustment: Checking
Disconnect large Black vacuum line from power servo, disconnect potentiometer lead connector, connect accurate Ohmmeter to connector plug. Potentiometer resistance should be approximately 70 ohms. Connect vacuum line, start engine, and operate Comfortron system. After servo has been actuated by engine vacuum, Ohmmeter reading should drop to approximately 15 ohms. If performance not correct, make adjustment as follows: