My window A/C is starting making strange noises for some reason

I’m sensitive to sound after a short work in the military. Hearing artillery strikes and IUDs going off with the implied threat of existential harm was too much for my mind. I don’t love loud noises, especially a singles that are unexpected or terrifying. Machine noises are even worse for some reason, it’s the uncanny association with past memories that stirs my sense of dread faster than other sounds of the same decibel level. For instance, I’m not bothered so much by the sounds of crowds, crying babies, or noisy pets, as none of these serve as triggers for my PTSD symptoms. Sadly, it can be something as trivial as a rattling in my microwave while the dish is spinning and I can go from feeling nice to having an anxiety attack in a matter of seconds. It’s nearly as instantaneous as flipping on a light switch. Recently it has been my window A/C that has been giving me complications. It makes a loud metallic oscillation noise whenever the device is cycling, regardless of how hard I’m running it throughout the afternoon. The sound comes and goes as well, making it impossible to ignore. I suppose if it was constant, my brain would eventually lose the ability to register it altogether; but its constant exit and re-entrance into my train of thought is what gives it an unmistakably eerie quality. I realized that the only solution to this complication would be getting the device repaired, but the Heating and Air Conditioning supplier I called told me it would be cheaper to buy a brand new window A/C rather than taking it apart and trying to repair the noise complication as it could result from a number of weird causes.

 

Electric heating system