I am a highly skilled and experienced home service professional. I recently completed a job at a residential property where I cleared drains, checked wiring, and checked motors. The systems were cooling completely, and the customer reported hearing a noise from the bedroom unit. I investigated and found that the noise was coming from refrigeration in the lines when the system started. I checked the system and found that it was not making any noise while it was running. I also checked the electrical connections and found that they were all secure. The customer was satisfied with the work and thanked me for my help.