Strange noise, A/C component suspected?

I just replaced the PCM on this car and it's running well. There were many error messages and malfunctions going on before the replacement, including that the car wouldn't start. At one point, I don't know if it is related or coincidental, it started making an unmistakable noise when the ignition was turned to "on." It had nothing to do with the engine or trying to start it. It would stop in 30 to 60 seconds. It was coming from the passenger side and sounded like it was under the dash. After checking the engine side and passenger side of the firewall it sounded more likely to be on the inside passenger side to me. It sounded quite similar to a windshield wiper in action. (I have included an audio attachment of it). The person who got the PCM working, and the chip keys set up said it had something to do a gear trying to engage in some component of the A/C system. (I hope I have that straight). In any case, the car is otherwise fine, but it still makes the noise and there is no AC to cool us in our incredibly hot/humid Southwest Florida summer weather. Any insight(s) would be really appreciated. "Filetype not allowed."
PS I couldn't upload the audio recording (message).