With the AC off, when I press the "auto" key, the AC on indicator LED does not light up. In addition, the AC compressor is turner on all time, it does not shut down, regardless of the set temperature.



In another function other than "auto", the AC button turns the compressor on and off, but it remains on or off indefinitely, it does not do the on / off control due to the temperature in the evaporator.



Which part do I need to change?